JP5437196B2 - Production plan creation method, production plan creation program, and production plan creation device - Google Patents

Description

  The present invention relates to a production plan creation method, a production plan creation program, and a production plan creation apparatus that create orders by assigning loads of a plurality of orders that are production targets to orders with various delivery dates.

  Conventionally, there is a technology for creating a production plan by allocating the load of multiple orders that are production targets to multiple time segments on the time axis divided by a predetermined width between the start and end of the production plan. Has been developed. As a technique for leveling the load allocated to the production plan, loads are temporarily allocated (stacked) to a plurality of time segments divided by a predetermined width. There is a method of reducing the fluctuation of the load for each time segment by sequentially moving a part of the system to adjacent time segments with a low load (climbing) (for example, Patent Document 1). In addition, as a method of allocating the load temporarily, there are a method of allocating on the basis of the delivery date (to a limit time segment in time for the delivery date) and a method of allocating on the basis of the earliest start (to the time segment at which work can be started earliest).

  In a provisional load assignment state, a time segment with a high load and a time segment with a low load are usually mixed. In a time segment with a high load, the process capacity is greatly exceeded, and it is often impossible to execute the produced production plan as it is. Therefore, by using the method as in Patent Document 1, the load is reduced in the time segment with a high load, and the load is increased in the time segment with a low load, so that the process capability can be effectively utilized. It is possible to create a production plan that minimizes delays in delivery within the scope of capacity.

JP 2006-338602 A

However, the conventional technique as shown in Patent Document 1 has the following problems.
-It is necessary to repeatedly execute a search for a time segment with a high load and move a load to an adjacent time segment, and it takes a lot of calculation time until the overall load is finally leveled.
・ As long as the load exceeds the process capability, even if the delivery date is sacrificed, a feasible production plan can be created by breaking down in the future direction of the time axis, but under the conditions that strictly adhere to the delivery date, Load leveling that allows excess of process capability is not possible. This is due to the fact that the prior art does not have a clear landscaping termination condition other than “the load falls below the process capability”. For this reason, it is difficult to formulate a production plan in time for delivery even if a little increase in process capability (for example, overtime or increase in labor (it is better if it is less)). Alternatively, it is not possible to obtain a guide as to how much process capacity enhancement measures can be taken at which time divisions to meet the delivery date.

  Therefore, the problem to be solved by the present invention is that a production plan creation method, a production plan creation program, and a production plan capable of creating a production plan that complies with the delivery date of an order while allowing a slight excess of process capability. A creation device is provided.

  The production plan creation method according to the present invention allocates loads of a plurality of orders to be produced to a plurality of time segments on a time axis divided by a predetermined width from the start to the end of the production plan. A production plan creation method for creating a production plan, wherein the processing executed by the computing unit of the computer includes an order information storage step for registering delivery dates and loads of the plurality of orders as order information, and A load accumulation step that loads the loads into time segments corresponding to the delivery times of the plurality of orders and outputs the result as a load accumulation result, and a time segment in which the loads are accumulated based on the load accumulation result is a load accumulation calculation time segment For each load accumulation calculation time segment, before the load accumulation calculation time segment is accumulated in the time segment in the past direction of the time axis. Load accumulation calculation step of accumulating loads and outputting them as load accumulation calculation results, and load accumulation in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period based on the load accumulation calculation results The load increase rate calculation step for calculating the load increase rate as the load increase rate and the start time segment of the load increase rate calculation period are fixed, and the width of the load increase rate calculation period is set to the start time segment of the production plan. To a load increase rate calculation period update step that changes and updates in units of time segments from the production plan to the end time segment of the production plan, and the maximum value of the load increase rate in accordance with the update of the load increase rate calculation period A maximum load increase rate update step for updating the load increase rate calculation period as the maximum value as a maximum load increase rate and a maximum load increase rate calculation period, and the load increase rate meter The end of the update of the width of the period is determined, the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain collapse, and the start time section of the load increase rate calculation period is updated In the load increase rate calculation management step and the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the load that reallocates the load by regarding the corresponding maximum load increase rate as the process capability A mountain climbing step.

  The production plan creation program according to the present invention allocates loads of a plurality of orders to be produced to a plurality of time segments on a time axis divided by a predetermined width from the start to the end of the production plan. A production plan creation program for creating a production plan, the order information storage step for registering the delivery date and load of the plurality of orders as order information, and the load of the plurality of orders corresponding to the delivery date of the plurality of orders A load stacking step in which the load is stacked and output as a load stacking result, and the load storage calculation time segment is defined as the load accumulation calculation time segment based on the load stacking result. Accumulate the load by accumulating the load accumulated in the time segment in the past direction of the time axis from the load accumulation calculation time segment. A load accumulation calculation step that is output as a calculation result, and based on the load accumulation calculation result, an increment of load accumulation in the future direction of the time axis per unit time segment in a predetermined load increase rate calculation period is defined as a load increase rate. With the load increase rate calculation step to be calculated and the start time segment of the load increase rate calculation period fixed, the width of the load increase rate calculation period is changed from the start time segment of the production plan to the end time segment of the production plan. The load increase rate calculation period update step that changes and updates in units of time intervals, and the load increase rate maximum value and the load that becomes the maximum value in accordance with the update of the load increase rate calculation period The maximum load increase rate update step for updating the increase rate calculation period as the maximum load increase rate and the maximum load increase rate calculation period, and the end of the update of the width of the load increase rate calculation period is determined. A load increase rate calculation management step for registering the maximum load increase rate and the maximum load increase rate calculation period as load increase rate information for mountain break, and updating a start time section of the load increase rate calculation period; In the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate is regarded as a process capability, and a load load collapse step for reallocating the load is included. It is characterized in that the computer reads the data out by the calculation unit and executes the processing of each step.

  The production plan creation device according to the present invention uses a computing unit of a computer to load a plurality of orders that are production targets on a time axis divided by a predetermined width from the start to the end of the production plan. A production planning device that allocates the time divisions to create a production plan, the order information storage unit for registering the delivery date and load of the plurality of orders as order information, and the plurality of loads of the plurality of orders. The load stacking unit that piles up in the time division corresponding to the delivery date of the order and outputs it as the load pile result, and the time division in which the load is piled up based on the load pile result is used as the load accumulation calculation time division. Load accumulation calculation is performed by accumulating the load accumulated in the time direction in the past direction of the time axis relative to the load accumulation calculation time segment. The load accumulation calculation unit that outputs as a result, and the load accumulation increment in the future direction of the time axis per unit time segment in a predetermined load increase rate calculation period is calculated as the load increase rate based on the load accumulation calculation result The load increase rate calculation unit and the start time segment of the load increase rate calculation period are fixed, and the width of the load increase rate calculation period is changed from the start time segment of the production plan to the end time segment of the production plan. A load increase rate calculation period update unit that changes and updates in units of time segments, and the load increase rate maximum value and the load increase that becomes the maximum value in accordance with the update of the load increase rate calculation period A maximum load increase rate update unit that updates the rate calculation period as a maximum load increase rate and a maximum load increase rate calculation period, and determines the end of updating the width of the load increase rate calculation period, and the maximum load increase rate and the A load increase rate calculation management unit that registers a large load increase rate calculation period as load increase rate information for mountain break and updates a start time section of the load increase rate calculation period, and load increase rate information for the mountain break In the maximum load increase rate calculation period registered in (1), the load maximum break rate corresponding to the maximum load increase rate is regarded as a process capability, and a load crushing unit for reallocating the load is provided.

  According to this, the load for each order is first piled up in the limit time section in time for the delivery date. Next, the accumulation of the load piled up based on this load pile result is calculated. A predetermined load increase rate calculation period starting from a predetermined time segment is given to the load accumulation result. Next, the load increase rate (the load per unit time section in the section) is calculated from the increment of load accumulation in the load increase rate calculation period. Furthermore, after fixing the start time segment of the load increase rate calculation period, the end time segment is changed in units of time segments, and a new load increase rate is calculated. Among these calculated load increase rates, the maximum value and the period for which the maximum value is taken are always maintained, and when the update of the end time section of the load increase rate calculation period is completed, the maximum value and The period is registered as hill-climbing load increase rate information. Then, this mountain climbing load increase rate information is the minimum process capability necessary to comply with the delivery date of the order included in the period. Next, after updating the start time section of the load increase rate calculation period and performing the same processing as described above, new load increase rate information for mountain climbing is generated. The calculated load increase rate for each period is regarded as the process capability of the period, and the load is reassigned (climbing), and stored and stored as a crushing result. As described above, the minimum process capability required to meet the delivery date can be calculated for each period before the hill-climbing operation (= load leveling operation), so it is necessary to repeat the hill-climbing operation as in the conventional method. The load can be leveled at high speed. Furthermore, it is possible to estimate the minimum process capability required to strictly observe the delivery date. Therefore, it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of process capability. The start time segment and the end time segment of the production plan mean time segments corresponding to the start and end of the production plan. The start time segment and the end time segment of the load increase rate calculation period mean a start time segment and an end time segment of the load increase rate calculation period, which are periods for calculating the load increase rate.

  Here, in the production plan creation method and the production plan creation program according to the present invention, the load increase rate calculation period update step further includes the load increase rate calculation period within a preset upper limit range in units of time segments. You can change it.

  In the production plan creation device according to the present invention, the load increase rate calculation period update unit may further change the load increase rate calculation period in units of time sections within a preset upper limit.

According to this, the upper limit is set to the width of the load increase rate calculation period (end time segment-start time segment) when calculating the load increase rate from the load accumulation result, and the start time segment of the load increase rate calculation period is set The update (expansion) of the load increase rate calculation period after fixing is terminated when the width of the load increase rate calculation period reaches this upper limit. here,
・ Upper limit of load increase rate calculation period → Large: Fluctuation of load → Small: Degree of advance production for delivery date → Large upper limit of calculation period width of load increase rate → Small: fluctuation of load → Large: For delivery time Since there is a small relationship →
・ If importance is attached to load leveling, increase the upper limit of the load increase rate calculation period.
・ In order to reduce the inventory due to pre-production as much as possible in order to ship in accordance with the delivery date, the upper limit of the load increase rate calculation period is reduced.
It is possible to easily reflect the landslide (load leveling) policy according to the situation.

Further, in the production plan creation method and the production plan creation program according to the present invention, the load increase rate calculation period update step fixes the start time section of the load increase rate calculation period with the start time section of the production plan as an initial value. In this state, the width of the load increase rate calculation period is updated in increments of time segments until reaching the end time segment of the production plan, and the load increase rate calculation management step is updated in the load increase rate calculation period. Based on whether or not the end time segment is the end time segment of the production plan, it is determined whether the update of the width of the load increase rate calculation period is completed, and the maximum load increase rate and the maximum load increase rate calculation period are crushed And the start time segment of the load increase rate calculation period to the next time segment moved in the future direction of the time axis from the maximum load increase rate calculation period. Newly, the load leveling step determines the end of registration of the level increase rate information for landslides based on whether the end time segment of the maximum load increase rate calculation period is the end time segment of the production plan. In the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate may be regarded as process capability and the load may be reassigned .

In the production plan creation device according to the present invention, the load increase rate calculation period updating unit fixes the load increase rate in a state where the start time segment of the load increase rate calculation period is fixed with the start time segment of the production plan as an initial value. The rate calculation period width is updated in increments of time segments until reaching the end time segment of the production plan, and the load increase rate calculation management unit determines that the end time segment of the load increase rate calculation period is the production plan. The end of update of the width of the load increase rate calculation period is determined based on whether or not the end time segment of the load, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing In addition, the start time segment of the load increase rate calculation period is updated to the next time segment moved in the future direction of the time axis from the maximum load increase rate calculation period, and the load crushing unit is configured to increase the maximum load increase. The end of the calculation period is determined based on whether or not the end time of the production plan, the end of the load increase rate information for mountain climbing is determined to be registered, and the load increase rate information for the mountain break is registered in the information In the maximum load increase rate calculation period, the corresponding maximum load increase rate may be regarded as the process capability and the load may be reassigned .

According to this, the start time segment of the load increase rate calculation period is fixed, the end time segment is advanced in the future direction, and a new load increase rate is calculated, so it is easy to calculate the load increase rate can do. In addition, since the start time segment of the load increase rate calculation period is updated to the next time segment moved in the future direction of the time axis from the maximum load increase rate calculation period, newly generated load increase rate information for mountain breaks Since the registered maximum load increase rate calculation period and the maximum load increase rate calculation period registered as crushed load increase rate information are connected on the time axis, the load over a long period of time Adjustment can be performed quickly and easily .

Further, in the production plan creation method and the production plan creation program according to the present invention, the load increase rate calculation period update step further includes whether the end time segment of the load increase rate calculation period is the load cumulative calculation time segment. If the end time segment of the load increase rate calculation period is the load cumulative calculation time segment, the width of the load increase rate calculation period is updated, while the end time segment of the load increase rate calculation period is the If it is not the load accumulation calculation time section, the load increase rate calculation period may not be updated, and the load increase rate calculation period may be further changed in units of time sections .

In the production plan creation device according to the present invention, the load increase rate calculation period update unit further determines whether an end time segment of the load increase rate calculation period is the load cumulative calculation time segment, and the load increase rate If the end time segment of the calculation period is the load accumulated calculation time segment, the width of the load increase rate calculation period is updated, while the end time segment of the load increase rate calculation period must be the load accumulated calculation time segment. For example, the width of the load increase rate calculation period may not be updated, and the load increase rate calculation period may be further changed in units of time .

According to this , since the load is not accumulated and the load increase rate does not change on days other than the load accumulation calculation time section, the calculation can be simplified and the calculation can be made more efficient and faster. .

  The production plan creation program according to the present invention can be recorded and distributed on a fixed recording medium such as a removable recording medium or a hard disk, or via a communication network such as the Internet by wired or wireless telecommunication means. It can be distributed.

  The production plan creation method, the production plan creation program, and the production plan creation apparatus of the present invention can create a production plan that complies with the delivery date of an order while allowing a slight excess of process capability.

It is a block diagram of a production plan creation device concerning this embodiment. It is the flowchart explaining the procedure of the process of the production plan preparation method which concerns on this embodiment. It is a figure which shows the production process of the order used as the object of the production plan which concerns on a present Example. It is a figure which shows the delivery date and load of the order used as the object of the production plan which concerns on a present Example. It is a figure which shows the load pile result of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the load accumulation calculation result of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the image of the load increase rate of [period 1] of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the image of the load increase rate of [period 2] of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the image of the load increase rate of [period 3] of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the image of the load increase rate of the whole period of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the landslide result of the production plan which concerns on the present Example 1. FIG. It is a figure which shows the relationship between the leveling result of the production plan which concerns on the present Example 1, and process capability. It is a figure which shows the image of the load increase rate of [period 1] of the production plan which concerns on the present Example 2. FIG. It is a figure which shows the image of the load increase rate of [period 2] of the production plan which concerns on the present Example 2. FIG. It is a figure which shows the image of the load increase rate of [period 3] of the production plan which concerns on the present Example 2. FIG. It is a figure which shows the image of the load increase rate of [period 4] of the production plan which concerns on the present Example 2. FIG. It is a figure which shows the image of the load increase rate of the whole period of the production plan which concerns on the present Example 2. FIG. It is a figure which shows the landslide result of the production plan which concerns on the present Example 2. FIG.

  Hereinafter, a form for carrying out a production plan creation method, a production plan creation program, and a production plan creation apparatus according to the present invention will be described based on a specific example with reference to the drawings.

  In addition, what is demonstrated below is only what was illustrated and does not show the application limit of the production plan creation method, the production plan creation program, and the production plan creation device according to the present invention. That is, the production plan creation method, the production plan creation program, and the production plan creation device according to the present invention are not limited to the following embodiments, and various modifications are possible as long as they are described in the claims. Is.

  In addition, the time division used in the production plan creation method, the production plan creation program, and the production plan creation apparatus according to the present embodiment described below (that is, the time axis divided by a predetermined width from the start to the end of the production plan). As the above-mentioned plurality of consecutive divisions, a day unit may be used, and a unit such as a month, a week, a work, or a time can be used.

  First, the production plan creation apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram of a production plan creation apparatus according to the present embodiment. The production plan creation apparatus 1 includes a calculation unit, a storage unit, an input unit, and an output unit, and is mounted on a computer. Here, each part (calculation part, memory | storage part, input part, and output part) of the production plan preparation apparatus 1 shown by FIG. 1 is comprised by computers, such as a general purpose personal computer. Such a computer stores hardware such as a CPU, ROM, RAM, hard disk, and CD-ROM drive, and the hard disk stores a program (this program is recorded on a removable storage medium). Can be installed on a variety of computers). And the above-mentioned each part is constructed | assembled by combining these hardware and software.

  As shown in FIG. 1, the production plan creation device 1 includes a load pile unit 11, a load accumulation calculation unit 12, a load increase rate calculation unit 13, a load increase rate calculation period update unit 14, and a maximum load increase rate update. Unit 15, load increase rate calculation management unit 16, load crushing unit 17, order information (order information storage unit) 21, load pile result 22, load accumulation calculation result 23, and load increase rate calculation start time It is composed of a category 24, an upper limit width 25 of a load increase rate calculation period, a load increase rate calculation period 26, a maximum load increase rate information 27, a load increase rate information 28 for mountain breaks, and a mountain break result 29. The

  The order information (order information storage unit) 21 is for registering and storing delivery dates and loads of a plurality of orders to be produced from the outside as order information. As the load of each order, weight, quantity, number, time and the like can be used. Here, in the order information storage unit 21, information registered from outside is input from an input unit (keyboard or the like) (not shown) at the start of production plan creation, recorded in a removable storage medium, provided, or wired. Alternatively, it is given via a communication network such as the Internet by wireless electric communication means and stored in a storage device, an auxiliary storage device or the like.

  The load pile calculation unit 11 is used to pile up the load of each order registered in the order information storage unit 21 into time segments corresponding to the delivery date of each order, and to output as a load pile result 22. Then, the load pile result 22 is input to the load accumulation calculation unit 12.

  The load accumulation calculation unit 12 calculates the accumulation of the load in the future direction on the time axis based on the load pile result 22 and outputs it as the load accumulation calculation result 23. Specifically, the load accumulation calculation unit 12 uses the load accumulation result 22 as a load accumulation calculation time segment in the time segment in which the load is accumulated, and for each load accumulation calculation time segment, Accumulate loads piled up in the past time segment. Then, the result is output as a load accumulation calculation result 23. In addition, since it is cumulative, the cumulative value increases monotonously with the future direction of the time axis, that is, with the advance of the day. Then, the load accumulation calculation result 23 is input to the load increase rate calculation unit 13.

  The load increase rate calculation start time section 24 is for storing a start time section of a load increase rate calculation period, which is a period in which the load increase rate calculation unit 13 calculates the load increase rate. In the load increase rate calculation start time section 24, the start time section of the production plan is set as an initial value. Here, the information set in advance as the initial value of the load increase rate calculation start time section 24 is input from an input unit (keyboard or the like) (not shown) or recorded in a removable storage medium at the start of production plan creation. Or provided via a communication network such as the Internet by wired or wireless telecommunication means and stored in a storage device, an auxiliary storage device or the like.

The load increase rate calculation period update unit 14 fixes the width of the load increase rate calculation period (that is, the load increase rate calculation period of the load increase rate calculation period) while the start time section of the load increase rate calculation period is fixed. For changing the range from the start time segment to the end time segment) within the preset upper limit width 25 of the load increase rate calculation period until the end time segment of the production plan. Is. Then, the updated load increase rate calculation period is output as the load increase rate calculation period 26 as information on how many times ahead from the start time segment of the load increase rate calculation period registered as the load increase rate calculation start time segment 24. Is done. Note that the information output as the load increase rate calculation period 26 is not limited thereto, and may be output as the width of a time segment including the start time segment of the load increase rate calculation period, or the start of the load increase rate calculation period A time segment and an end time segment may be output. Here, 0 (zero) is initially registered as the load increase rate calculation period. That is, in the initial state, the end time segment of the load increase rate calculation period = the start time segment.
Then, the load increase rate calculation period update unit 14 changes the width of the load increase rate calculation period based on the load accumulated calculation time interval, and the end time interval of the load increase rate calculation period is the load accumulated calculation time interval. Judge whether or not. If the end time section of the load increase rate calculation period is the load accumulation calculation time section, the load increase rate calculation period is updated. On the other hand, if the end time section of the load increase rate calculation period is not the load accumulation calculation time section, the load increase rate calculation period is not updated, the load increase rate calculation period is further changed in units of time sections, and the load increases again. It is determined whether the end time section of the rate calculation period is the load accumulated calculation time section. This is because on days other than the load accumulation calculation time section, the load is not accumulated and the load increase rate does not change, so that the calculation can be simplified. This determination need not be made and is not an essential requirement of the present embodiment.
Further, the load increase rate calculation period update unit 14 may execute the condition “the end time segment of the load increase rate calculation period is the end time segment of the production plan” or “the load with the width of the load increase rate calculation period set in advance” If the condition “the upper limit width 25 of the increase rate calculation period” is satisfied, the update of the load increase rate calculation period is terminated.

  The upper limit width 25 of the load increase rate calculation period is for storing the upper limit of the width of the load increase rate calculation period. Here, in the upper limit 25 of the load increase rate calculation period, preset information is input from an input unit (keyboard or the like) (not shown) or recorded in a removable storage medium at the start of production plan creation. Or provided via a communication network such as the Internet by wired or wireless telecommunication means and stored in a storage device, an auxiliary storage device or the like.

  The load increase rate calculation unit 13 calculates, based on the load accumulation calculation result 23, an increment of load accumulation in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period as a load increase rate. belongs to. Specifically, based on the load accumulation calculation result 23, the load accumulation increase in the load increase rate calculation period 26 (corresponding to a predetermined load increase rate calculation period) updated by the load increase rate calculation period update unit 14. Is calculated as the load increase rate. The calculated load increase rate is input to the maximum load increase rate update unit 16.

  The maximum load increase rate update unit 15 is for registering the maximum load increase rate and the maximum load increase rate calculation period in the maximum load increase rate information 27, and the load increase rate calculated by the load increase rate calculating unit 13. And the maximum load increase rate registered in the maximum load increase rate information 27, and the maximum load increase rate registered in the maximum load increase rate information 27 in which the load increase rate calculated by the load increase rate calculating unit 13 is compared. If the increase rate is equal to or greater than the increase rate, the load increase rate and the load increase rate calculation period 26 calculated by the load increase rate calculation unit 13 are set as the maximum load increase rate and the maximum load increase rate calculation period in the maximum load increase rate information 27. It is for renewal registration. The maximum load increase rate information 27 is initially registered as maximum load increase rate = 0 (zero) and maximum load increase rate calculation period = none.

  The load increase rate calculation management unit 16 determines that the load increase rate calculation period update unit 14 has a condition that “the end time segment of the load increase rate calculation period is the end time segment of the production plan” or “the load increase rate calculation period Information that is registered in the maximum load increase rate information 27 when the update of the load increase rate calculation period has been completed and it is determined that the condition of “the width of the load has reached the preset upper limit range” is satisfied. (Maximum load increase rate and maximum load increase rate calculation period) are registered as the hill-climbing load increase rate information 28, and it is determined whether the end time segment of the maximum load increase rate calculation period is the end time segment of the production plan. Until the load increase rate calculation start time segment registered in the load increase rate calculation start time segment 24 is updated to the next time segment of the maximum load increase rate calculation period. However, when the load increase rate calculation management unit 16 determines that the end time segment of the maximum load increase rate calculation period registered in the maximum load increase rate information 27 is the end time segment of the production plan, the load increase rate The load increase rate information 28 for load collapse is output to the load collapse unit 17 without updating the load increase rate calculation start time segment registered in the calculation start time segment 24.

  Based on the hill-climbing load increase rate information 28, the load-climbing unit 17 calculates the corresponding maximum load increase rate for each maximum load increase rate calculation period, and the production capacity of the process in each maximum load increase rate calculation period. By considering it, it is for reassigning the load. Then, the load collapse result obtained by reallocating the load is stored as a collapse result 29. Note that the mountain break result 29 may be output as a calculation result in the production plan creation apparatus 1 to an output unit such as a display or a printer (not shown) via a result output unit (not shown).

Next, the processing procedure of the production plan creation method according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart illustrating the processing procedure of the production plan creation method according to the present embodiment.
The process of the production plan creation method according to the present embodiment described below can be read and executed by the CPU as a production plan creation program in the computer as well. Further, the production plan creation program can be installed in storage devices of various computers by recording it in a removable storage medium.

  As shown in FIG. 2, in a computer, as order information, the delivery date and load of a plurality of orders to be produced are input in advance from an input unit, recorded in a removable storage medium, given, or wired Alternatively, it is given through a communication network such as the Internet by wireless telecommunication means and registered in the storage unit (STEP 1: order information storage step). In addition, the upper limit of the load increase rate calculation period is input in advance from the input unit, recorded in a removable storage medium, or provided via a communication network such as the Internet by wired or wireless telecommunication means. Or set in the storage unit (STEP 1: load increase rate calculation period update step). Note that the details of this step are the same as the description contents of the order information 21 and the load increase rate calculation period upper limit width 25 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, the load of each order registered in STEP 1 is piled up in time segments corresponding to the delivery date of each order, and output as a load pile result (STEP 2: load pile step). The details of this step are the same as those described in the load stacking unit 11 and the load stacking result 21 of the production plan creation device 1 described above, and a description thereof will be omitted.

  Next, based on the load accumulation result output in STEP2, the accumulation of loads in the future direction on the time axis is calculated and output as a load accumulation calculation result (STEP3: load accumulation calculation step). Specifically, in the load accumulation result, the time division in which the load was piled up was set as the load accumulation calculation time division, and for each load accumulation calculation time division, the load was accumulated in the time division in the past direction of the time axis rather than the time division. Accumulate the load. Then, the result is output as a load accumulation calculation result. The details of this step are the same as those described in the load accumulation calculation unit 12 and the load accumulation calculation result 23 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, the start time section of the load increase rate calculation period is initialized (STEP 4: load increase rate calculation period update step). Specifically, the start time section of the production plan is set as the initial value. This step is the same as the description of the load increase rate calculation start time section 24 of the production plan creation apparatus 1 described above, and a description thereof is omitted.

  Next, the maximum load increase rate and the maximum load increase rate calculation period, which are maximum load increase rate information, are initialized (STEP 5: maximum load increase rate update step). As initial values, the maximum load increase rate = 0 (zero) and the maximum load increase rate calculation period = none are registered. This step is the same as the description of the maximum load increase rate update unit 15 and the maximum load increase rate information 27 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, the width of the load increase rate calculation period that is a period for calculating the load increase rate (that is, the width from the start time segment to the end time segment of the load increase rate calculation period) is initialized (STEP 6: load increase rate calculation period) Update step). 0 (zero) is registered as an initial value. That is, in the initial state, the end time segment of the load increase rate calculation period = the start time segment. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Next, with the start time segment of the load increase rate calculation period fixed, the end time segment of the load increase rate calculation period is loaded to change the width of the load increase rate calculation period based on the load accumulated calculation time segment. It is determined whether or not it is a cumulative calculation time section (STEP 7: load increase rate calculation period update step). If the end time section of the load increase rate calculation period is the load accumulated calculation time section (STEP 7: YES), the load increase rate calculation period is updated and the process proceeds to STEP 8. On the other hand, if the end time section of the load increase rate calculation period is not the load accumulation calculation time section (STEP 7: NO), the load increase rate calculation period is further changed in units of time sections (STEP 12: load increase rate calculation period update step) ) Again, it is determined whether or not the end time section of the load increase rate calculation period is the load accumulation calculation time section (STEP 7). Here, STEP 7 may not be performed, and is not an essential requirement of the present embodiment. When STEP 7 is not performed, the process proceeds from STEP 6 to STEP 8. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Next, based on the load accumulation calculation result calculated in STEP 3, the load accumulation increment in the load increase rate calculation period updated in STEP 7 is calculated as a load increase rate (STEP 8: load increase rate calculation step). In addition, this step is the same as the description content of the load increase rate calculation part 13 of the production plan preparation apparatus 1 mentioned above, The description is abbreviate | omitted.

  The load increase rate calculated in STEP 8 is registered by comparing the load increase rate calculated in STEP 8 with the maximum load increase rate registered as maximum load increase rate information (STEP 9: maximum load increase rate update step). If it is equal to or greater than the maximum load increase rate registered as the maximum load increase rate information (STEP 9: YES), the load increase rate calculated in STEP 8 and the load increase rate calculation period are set to the maximum load increase rate information of the maximum load increase rate information. The update is registered as the maximum load increase rate calculation period (STEP 10: maximum load increase rate update step), and the process proceeds to STEP 11. If the load increase rate calculated in STEP 8 is not equal to or greater than the maximum load increase rate registered as the registered maximum load increase rate information (STEP 9: NO), the process proceeds to SPTE 11. This step is the same as the description of the maximum load increase rate update unit 16 of the production plan creation device 1 described above, and the description thereof is omitted.

  In STEP 11, the condition “the end time section of the load increase rate calculation period is the end time section of the production plan” or “the width of the load increase rate calculation period is the upper limit width of the load increase rate calculation period set in advance” It is determined whether or not the condition is satisfied (STEP 11: load increase rate calculation period update step). The condition of "End time section of load increase rate calculation period is the end time section of production plan" or "The width of load increase rate calculation period is the upper limit width of load increase rate calculation period set in advance" If any one of the conditions is satisfied (STEP 11: YES), the update of the load increase rate calculation period is terminated, and the process proceeds to STEP 13. On the other hand, the condition “the end time section of the load increase rate calculation period is the end time section of the production plan” or “the width of the load increase rate calculation period is the upper limit width of the load increase rate calculation period set in advance” If any of the conditions is not satisfied (STEP 11: NO), the process returns to STEP 12. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  In STEP13, information registered as maximum load increase rate information (maximum load increase rate and maximum load increase rate calculation period) is registered as hill-climbing load increase rate information (STEP13: load increase rate calculation management step). This step is the same as the description of the load increase rate calculation management unit 16 of the production plan creation apparatus 1 described above, and the description thereof is omitted.

  Then, it is determined whether or not the end time section of the maximum load increase rate calculation period is the end time section of the production plan (STEP 14: load increase rate calculation management step). If it is determined that the end time segment of the maximum load increase rate calculation period is not the end time segment of the production plan (STEP 14: NO), the start time segment of the load increase rate calculation is set to the next time of the maximum load increase rate calculation period. Update to the category (STEP 15: Load increase rate calculation management step), and return to STEP 5. On the other hand, when it is determined that the end time section of the maximum load increase rate calculation period is the end time section of the production plan (STEP 14: YES), the process proceeds to STEP 16. This step is the same as the description of the load increase rate calculation management unit 16 of the production plan creation apparatus 1 described above, and the description thereof is omitted.

  In STEP 16, the maximum load increase rate calculation period is selected based on the hill-climbing load increase rate information (STEP 16: load landslide step), and the maximum load increase rate corresponding to the selected maximum load increase rate calculation period is selected. The load is reassigned by regarding it as the production capacity of the process in the calculated maximum load increase rate calculation period (STEP 17: load crushing step). Then, it is determined whether or not all the maximum load increase rate calculation periods have been selected (STEP 18: load crushing step). When it is determined that all the maximum load increase rate calculation periods have not been selected (STEP 18: NO) Returning to STEP 16, if it is determined that all the maximum load increase rate calculation periods have been selected (STEP 18: YES), the result of load collapse after reallocating the load is stored as the result of the collapse, and a production plan creation method Terminate the process. In addition, this step is the same as the description content of the load crushing unit 17 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  As described above, according to the production plan creation device, the production plan creation method, and the production plan creation program of the present embodiment, the loads for each order are first piled up in the limit time interval in time for the delivery date. Next, the accumulation of the load piled up based on this load pile result is calculated. A predetermined load increase rate calculation period starting from a predetermined time segment is given to the load accumulation result. Next, the load increase rate (the load per unit time section in the section) is calculated from the increment of load accumulation in the load increase rate calculation period. Furthermore, after fixing the start time segment of the load increase rate calculation period, the end time segment is advanced in the future direction, and a new load increase rate is calculated. Among these calculated load increase rates, the maximum value and the period for which the maximum value is taken are always maintained, and when the update of the end time section of the load increase rate calculation period is completed, the maximum value and The period is registered as hill-climbing load increase rate information. Then, this mountain climbing load increase rate information is the minimum process capability necessary to comply with the delivery date of the order included in the period. Next, update the start time segment of the load increase rate calculation period to the next time segment moved in the future direction of the time axis from the maximum load increase rate calculation period, and then perform the same process as above to create a new mountain break. The maximum load increase rate calculation period for which the load increase rate information is generated and registered as the newly generated mountain load increase rate information, and the maximum load registered as the mountain load increase rate information so far The increase rate calculation period is continuously obtained in a connected form on the time axis. The calculated load increase rate for each period is regarded as the process capability of the period, and the load is reassigned (climbing), and stored and stored as a crushing result. As described above, the minimum process capability required to meet the delivery date can be calculated for each period before the hill-climbing operation (= load leveling operation), so it is necessary to repeat the hill-climbing operation as in the conventional method. Therefore, adjustment of load leveling over a long period of time can be performed quickly and easily. Furthermore, it is possible to estimate the minimum process capability required to strictly observe the delivery date. Therefore, it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of process capability.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the above-described embodiment, the upper limit width 25 of the load increase rate calculation period is set in advance (STEP 1), but it may not be set. When the upper limit 25 of the load increase rate calculation period is not set in advance, the load increase rate calculation period update unit 14 sets only the condition that “the end time section of the load increase rate calculation period is the end time section of the production plan”. It is determined whether or not it is satisfied (STEP 11).

  Next, in order to explain specific examples of the production plan creation apparatus, production plan creation method, and production plan creation program of this embodiment, two simple examples will be described below.

  As shown in FIG. 3, the production process of an order targeted in the production plan according to the present embodiment has a process of one processing machine and a shipment buffer, and manufactures a product by inputting raw materials in order units. As shown in FIG. 4, in this embodiment, there are 12 orders of orders 1 to 12 having four types of delivery times of April 3, April 6, April 10, and April 13. On the other hand, the production plan after April 1 shall be performed. Orders 1 to 4 have a delivery date of April 3, orders 5 and 6 have a delivery date of April 6, orders 7 to 11 have a delivery date of April 10, and order 12 has a delivery date Is April 13th. The weight (load) of each order is 1 ton. Further, in this embodiment, the time division is set to 1 day, and the start time division of the production plan (in this embodiment, the time division is 1 day, which is the start date) is April 1, and the production plan end time. The division (in this embodiment, the time division is 1 day, which is the end date) is April 13. Further, in this embodiment, the delivery date is regarded as a delivery date, and if the manufacturing is completed before the delivery date, the product is shipped on the delivery date.

[Example 1]
First, Example 1 is demonstrated based on FIG. In this embodiment, twelve pieces of order information 21 from order 1 to order 12 shown in FIG. 4 are registered (STEP 1). As shown in FIG. 4, the delivery date for orders 1 to 4 is April 3, the delivery date for orders 5 and 6 is April 6, the delivery date for orders 7 to 11 is April 10, and the delivery date for order 12 is April. 13 days. Further, the load (weight in this embodiment) of each order is 1 ton. Then, the upper limit width 25 of the load increase rate calculation period is set as 13 days (STEP 1).

  And the load pile calculation part 11 piles up the load of each order registered in the order information memory | storage part 21 in the time division corresponding to the delivery date of each order, and outputs it as the load pile result 22 (STEP2). In this embodiment, since the time division is one day, the load pile unit 11 loads the loads of orders 1 to 12 on each delivery date, and the load pile result 22 is 4 as shown in FIG. March 3: 4 tons, April 6: 2 tons, April 10: 5 tons, April 13: 1 ton.

  Next, the load accumulation calculation unit 12 calculates the accumulation of the load in the future direction of the time axis based on the load accumulation result 22, and outputs it as the load accumulation calculation result 23 (STEP 3). In this embodiment, the delivery date becomes the load accumulation calculation date (load accumulation calculation time division), and as shown in FIG. 6, April 3: 4 tons, April 6: 2 tons + 4 tons = 6 tons, 4 March 10: 4 tons + 2 tons + 4 tons = 10 tons, April 13: 1 tons + 4 tons + 2 tons + 4 tons = 11 tons.

  Then, the load increase rate calculation start time section 24 initializes the start time section of the load increase rate calculation period, which is the period during which the load increase rate calculation unit 13 calculates the load increase rate (sets the start time section of the production plan) (STEP 4). In this embodiment, as the initial value of the load increase rate calculation start date (start time segment of the load increase rate calculation period) n, April 1 (n = 1) is the initial value of the load increase rate calculation start time segment 24. Is set.

  Then, the maximum load increase rate update unit 15 initially registers, as the maximum load increase rate information 27, the maximum load increase rate = 0 (zero) and the maximum load increase rate calculation period = none (STEP 5).

  Also, the load increase rate calculation period update unit 14 initially registers 0 (zero) as the load increase rate calculation period (STEP 6). In this embodiment, the load increase rate calculation period update unit 14 sets the width of the load increase rate calculation period to j days ahead from the load increase rate calculation start date n (that is, from the load increase rate calculation start date n to j days ahead). Is the end date of the load increase rate calculation period (end time section of the load increase rate calculation period)), j = 0 (ie, the load increase rate calculation end date = the load increase rate calculation start date). Is the initial value.

  Next, the load increase rate calculation period update unit 14 fixes the start time segment of the load increase rate calculation period, and the width of the load increase rate calculation period that is a period for calculating the load increase rate (that is, the load increase rate calculation period) In order to update the width of the calculation period from the start time segment to the end time segment) in units of time segments, determine whether the end time segment of the load increase rate calculation period is a load cumulative calculation time segment ( (STEP 7) If the end time section of the load increase rate calculation period is the load accumulation calculation time section, the load increase rate calculation period is updated (STEP 12). In this embodiment, the load increase rate calculation period update unit 14 calculates the load increase rate calculation period j from the load increase rate calculation start date n every time the load increase rate calculation unit 13 calculates the load increase rate. In the future direction, it is updated by incrementing by one day, which is a time division unit, until the next accumulated load calculation date. Then, it is determined whether or not the end date (n + j day) of the load increase rate calculation period is the load accumulation calculation date (the delivery date when the load is piled up). Here, first, the load accumulation rate calculation start date n = 1 (April 1) is fixed, the first cumulative calculation date is April 3, and j = 2 (April 1 2 To update the load increase rate calculation period.

Then, based on the load accumulation calculation result 23, the load increase rate calculation unit 13 calculates the load increase in the load increase rate calculation period 26 updated by the load increase rate calculation period update unit 14 as the load increase rate (STEP 8 ). In the present embodiment, the load increase rate Δ _{n, j} which is the load increase rate in the load increase rate calculation period j days after the load increase rate calculation start date n is calculated. First, the initial value input from the load increase rate calculation period 26 is the load increase during the load increase rate calculation period from April 1 to 2 days ahead of the load increase rate calculation start date (n = 1, j = 2). A rate is calculated, and based on FIG. 6, the load increase amount in the load increase rate calculation period is 4 tons, and the load increase rate calculation period is 3 days. Therefore, the load increase rate Δ _1,2 = 4 Ton / 3 day = 4/3 [ton / day].

Next, the maximum load increase rate update unit 15 compares the load increase rate calculated by the load increase rate calculation unit 13 with the maximum load increase rate registered in the maximum load increase rate information 27 to calculate the load increase rate. If the load increase rate calculated by the unit 13 is equal to or greater than the maximum load increase rate registered in the registered maximum load increase rate information 27, the load increase rate calculated by the load increase rate calculating unit 13 and the load increase rate calculation The period 26 is updated and registered in the maximum load increase rate information 27 as the maximum load increase rate and the maximum load increase rate calculation period (STEP 9). In the present embodiment, the load increase rate Δn _{, j} calculated in STEP 8 is compared with the maximum load increase rate. Here, since the calculated load increase rate Δn _{, j} is 4/3 [ton / day] and the registered maximum load increase rate is 0 (zero), the maximum load increase rate information is set to the maximum load. Increase rate = 4/3 [ton / day], Maximum load increase rate calculation period = Load increase rate calculation start date From April 1 to 2 (n = 1, j = 2), that is, maximum load increase rate The update period is registered as the end date m = n + j = 3 (April 3) of the calculation period.

  Then, the load increase rate calculation period update unit 14 performs the condition that “the end time segment of the load increase rate calculation period is the end time segment of the production plan” or “the load whose width of the load increase rate calculation period is set in advance” It is determined whether or not the condition “the upper limit width 25 of the increase rate calculation period” is satisfied (STEP 11). When any one of the conditions is satisfied (STEP 11: YES), the load increase rate calculation period update unit 14 ends the update of the load increase rate calculation period, and proceeds to STEP 13. In this embodiment, the upper limit 25 of the load increase rate calculation period is set to 13 days in advance. In this embodiment, in the state of n = 1 and j = 2, since neither condition is satisfied (STEP 11: NO), the load increase rate calculation period update unit 14 updates the load increase rate calculation period. In the state where the load increase rate calculation start date n = 1, j is increased by 1 day (j = 3), and the process returns to STEP7.

Thus, in the present embodiment, in the state where the load increase rate calculation start date n = 1, the condition that “the end time segment of the load increase rate calculation period is the end time segment of the production plan” and “the load increase rate” The calculation period width is the upper limit width 25 of the load increase rate calculation period set in advance ”, j = 12 (April 13 12th ahead of April 1 = the end date of the production plan, And the process from STEP7 to STEP12 is repeated in the load increase rate calculation period between the load increase rate calculation start date n and the load accumulation calculation date until the upper limit width of the load increase rate calculation period = 13 days. In this process, j = 5 (April 6), j = 9 (April 10), j = 12 (April 13), and the load increase rate Δ _{n, j} by the load increase rate calculator 13 is Calculated as follows:
Δ _1,5 = 1 [ton / day] (6 tons over 6 days)
Δ _1,9 = _11/10 [ton / day] (11 tons in 10 days)
Δ _1,12 = _12/13 [ton / day] (12 tons in 13 days)

Then, in the state where the load increase rate calculation start date n = 1, the load calculated at j = 5 (April 6), j = 9 (April 10), j = 12 (April 13) The load increase rate Δ _{n, j} during the increase rate calculation period is Δ _1,5 = 1 [ton / day], Δ _1,9 = _11/10 [ton / day], Δ _1,12 = _12/13 [ton] / Day] (12 tons in 13 days), both of which are smaller than Δ _1,2 = 4/3 [ton / day], and therefore the maximum load increase rate update unit 15 performs maximum load increase rate information 27. The information registered in is as follows.
Maximum load increase rate = 4/3 [ton / day]
Maximum load increase rate calculation period = load increase rate calculation start date April 1 to April 3 (n = 1, j = 2), that is, end date of maximum load increase rate calculation period m = n + j = 3 (April 3)

Next, the load increase rate calculation period update unit 14 sets the condition that “the end time segment of the load increase rate calculation period is the end time segment of the production plan” or “the width of the load increase rate calculation period is preset. If it is determined that any one of the conditions “the upper limit width 25 of the load increase rate calculation period” is satisfied (STEP 11: YES), the update of the load increase rate calculation period is ended, and the process proceeds to STEP 13 to proceed to the load increase rate. The calculation management unit 16 registers the information registered in the maximum load increase rate information 27 (the maximum load increase rate and the maximum load increase rate calculation period) as the mountain load increase rate information 28 (STEP 13). In this example,
[Period 1]
Start date of maximum load increase rate calculation period (n) = 1 (April 1)
End date of maximum load increase rate calculation period (m) = 3 (April 3)
Maximum load increase rate = 4/3 [ton / day]
It becomes. FIG. 7 shows an image of the hill-climbing load increase rate in [period 1] registered as the hill-climbing load increase rate information 28. In FIG. 7, from April 1 to April 3, a cumulative load line (thick straight line) leveled at a production rate of 4/3 [ton / day] is drawn. It can be seen that during this period, if production is performed at a higher pace than this, optical rotation occurs and excess inventory occurs, and if production is performed at a lower pace, delivery delays occur.

  Further, the load increase rate calculation management unit 16 determines whether the end time segment of the maximum load increase rate calculation period is the end time segment of the production plan (STEP 14). When the load increase rate calculation management unit 16 determines that the end time segment of the maximum load increase rate calculation period is the end time segment of the production plan (STEP 14: YES), the registration of the hill-climbing load increase rate information 28 is terminated. Then, load collapse is performed by the load collapse unit 17 (STEP 16). When the load increase rate calculation management unit 16 determines that the maximum end time segment of the load increase rate calculation period is not the end time segment of the production plan (STEP 14: NO), the load registered in the load increase rate calculation start time segment 24 The start time segment of the increase rate calculation is updated to the next time segment of the maximum load increase rate calculation period (STEP 15). In this embodiment, the load increase rate calculation management unit 16 determines that the end m = 3 (April 3) of the maximum load increase rate calculation period is not the end date (April 13) of the production plan (STEP 14). : NO), the start date n of the load increase rate calculation period is replaced with the day after the end date m of the maximum load increase rate calculation period registered as the hill-climbing load increase rate information 28 (assuming n = m + 1). Here, it is updated to n = 4 (April 4th). And it returns to STEP5.

Next, in the present embodiment, the processing from STEP5 to STEP15 is executed in a state where the start date n = 4 of the load increase rate calculation period. The load accumulation calculation dates in this process are April 6 (j = 2), 10th (j = 6), and 13th (j = 9), and each load increase rate by the load increase rate calculation unit 13 is as follows. The load increase rate Δn _{, j} during the calculation period is calculated as follows.
Δ _4,2 = 2/3 [ton / day] (2 tons in 3 days)
Δ _4,6 = 1 [ton / day] (7 tons in 7 days)
Δ _4,9 = _8/10 [ton / day] (8 tons in 10 days)

Thereby, the information registered in the maximum load increase rate information 27 by the maximum load increase rate update unit 15 in the state of the load increase rate calculation start date n = 4 is as follows.
Maximum load increase rate = 1 [ton / day]
Maximum load increase rate calculation period = Load increase rate calculation start date April 4 to April 10 (n = 4, j = 6), that is, end date of maximum load increase rate calculation period m = n + j = 10 (April 10)

Then, the information registered as the landslide load increase rate information 28 by the load landscaping unit 17 is:
[Period 2]
Start date of maximum load increase rate calculation period (n) = 4 (April 4)
End date of maximum load increase rate calculation period (m) = 10 (April 10)
Maximum load increase rate = 1 [ton / day]
It becomes. FIG. 8 shows an image of the hill-climbing load increase rate in [period 2] registered as the hill-climbing load increase rate information 28. In FIG. 8, a cumulative load line (thick straight line) leveled at a production rate of 1 [ton / day] is drawn from April 4 to April 10.

  Similarly, the load increase rate calculation management unit 16 determines that the end m = 10 (April 10) of the maximum load increase rate calculation period is not the end date (April 13) of the production plan (STEP 14: NO), the start date n of the load increase rate calculation period is replaced with the day following the end date m of the maximum load increase rate calculation period registered as the hill-climbing load increase rate information 28 (assuming n = m + 1). Here, it is updated to n = 11 (April 11). And it returns to STEP5.

Next, in the present embodiment, the processing from STEP5 to STEP15 is executed in the state where the start date n = 11 of the load increase rate calculation period. The load accumulation calculation date in this process is only April 13 (j = 2), and the load increase rate Δ _{n, j} of each load increase rate calculation period by the load increase rate calculating unit 13 is as follows. Calculated.
Δ _11,2 = 1/3 [ton / day] (1 ton in 3 days)

Accordingly, the information registered in the maximum load increase rate information 27 by the maximum load increase rate update unit 15 in the state of the load increase rate calculation start date n = 11 is as follows.
Maximum load increase rate = 1/3 [ton / day]
Maximum load increase rate calculation period = Load increase rate calculation start date April 11 to April 13 (n = 11, j = 2), that is, end date of maximum load increase rate calculation period m = n + j = 13 (April 13)

Then, the information registered as the landslide load increase rate information 28 by the load landscaping unit 17 is:
[Period 3]
Start date of maximum load increase rate calculation period (n) = 11 (April 11)
End date of maximum load increase rate calculation period (m) = 13 (April 13)
Maximum load increase rate = 1/3 [ton / day]
It becomes. FIG. 9 shows an image of the hill-climbing load increase rate in [period 3] registered as the hill-climbing load increase rate information 28. In FIG. 9, from April 11 to April 13, a cumulative load line (thick straight line) leveled to a production rate of 1/3 [ton / day] is drawn.

  At this stage, the load increase rate calculation management unit 16 determines that the end date m = 13 (April 13) of the maximum load increase rate calculation period is the end date (April 13) of the production plan (STEP 14). : YES), the registration of the mountain climbing load increase rate information 28 is terminated. FIG. 10 shows the result.

Then, for each of the periods shown in FIG. 10 ([period 1] to [period 3]), the load crushing unit 17 reallocates the load by regarding the load increase rate as the production capacity of the process. (STEP 16-18). FIG. 11 shows the result of reassigning the load. From FIG. 11, for example, the following can be understood.
● In [Period 1] (April 1st to 3rd), the load from order 1 to order 4 is allocated evenly with 4/3 [ton / day] as the production capacity. Here, since the delivery date of order 1 to order 4 is April 3, there is no delay in delivery date.
● In [Period 2] (April 4th to 10th), the load from order 5 to order 11 is evenly allocated with 1 [ton / day] as the production capacity. Here, the delivery date of order 5 and order 6 is April 6, and the delivery date of order 7 to order 11 is April 10, so there is no delay in delivery date.

  As described above, it can be seen from the present embodiment that the landslide for leveling the load as much as possible can be executed quickly and easily without repeating the selection and movement of the load while complying with the delivery date. Moreover, as shown in FIG. 12, the minimum capability improvement rate and period required in order to observe a delivery date can be confirmed easily. In this embodiment, the standard capacity is set to 1 ton / day, and it can be seen that the capacity improvement of 4/3 times is required from April 1 to April 3.

[Example 2]
Next, Example 2 will be described with reference to FIGS. In the second embodiment, an example in which the upper limit width 25 of the load increase rate calculation period set in STEP 1 of the first embodiment is shortened from 13 days to 6 days will be described. Here, in the second embodiment, other conditions such as order information and process capability are the same as those in the first embodiment. Further, since the processing flow is the same as that of the first embodiment, only the points different from the first embodiment will be described below.

In the second embodiment, since the upper limit width 25 of the load increase rate calculation period is set to 6 days (STEP 1), the load increase is performed in the state where the start date n = 1 (April 1) of the load increase rate calculation period. The update of the load increase rate calculation period by the rate calculation period update unit 14 ends on April 6 (STEP 11). Therefore, as shown in FIG. 13, first, the following [Period 1] in which the load increase rate is maximum between April 1 and April 6 is the maximum load increase rate by the maximum load increase rate update unit 15. It is set as information 27 (maximum load increase rate and maximum load increase rate calculation period) (STEPs 5 to 12), and is registered as mountain load increase rate information 28 by the load increase rate calculation management unit 16 (SETP13).
[Period 1]
Start date of maximum load increase rate calculation period (n) = 1 (April 1)
End date of maximum load increase rate calculation period (m) = 3 (April 3)
Maximum load increase rate = 4/3 [ton / day]

Next, the load increase rate calculation management unit 16 sets the start date n = 4 (April 4) of the load increase rate calculation period (STEPs 14 and 15). At this time, since the upper limit 25 of the load increase rate calculation period is set to 6 days (STEP 1), the load increase rate calculation is performed with the start date n = 4 (April 4) of the load increase rate calculation period. The update of the load increase rate calculation period by the period update unit 14 ends on April 9. Therefore, as shown in FIG. 14, the following [Period 2] in which the load increase rate is the maximum between April 4 and April 9 is the large load increase rate information 27 by the maximum load increase rate update unit 15. It is set as (maximum load increase rate and maximum load increase rate calculation period) (STEPs 5 to 12), and is registered as mountain load increase rate information 28 by the load increase rate calculation management unit 16 (SETP13).
[Period 2]
Start date of maximum load increase rate calculation period (n) = 4 (April 4)
End date of maximum load increase rate calculation period (m) = 6 (April 6)
Maximum load increase rate = 2/3 [ton / day]

Next, the load increase rate calculation management unit 16 sets the start date n = 7 (April 7) of the load increase rate calculation period (STEPs 14 and 15). At this time, since the upper limit 25 of the load increase rate calculation period is set to 6 days (STEP 1), the load increase rate calculation is performed in the state where the load increase rate calculation period start date n = 7 (April 7). The update of the load increase rate calculation period by the period update unit 14 ends on April 12. Therefore, as shown in FIG. 15, the following [period 3] in which the load increase rate is maximum between April 7 and April 12 is the large load increase rate information 27 by the maximum load increase rate update unit 15. It is set as (maximum load increase rate and maximum load increase rate calculation period) (STEPs 5 to 12), and is registered as mountain load increase rate information 28 by the load increase rate calculation management unit 16 (SETP13).
[Period 3]
Start date of maximum load increase rate calculation period (n) = 7 (April 7)
End date of maximum load increase rate calculation period (m) = 10 (April 10)
Maximum load increase rate = 5/4 [ton / day]

Next, the load increase rate calculation management unit 16 sets the start date n = 11 (April 11) of the load increase rate calculation period (STEPs 14 and 15). At this time, since the end date of the production plan period is April 13 (STEP 1), the load increase rate calculation period update unit 14 in the state of the load increase rate calculation period start date n = 11 (April 11). The update of the load increase rate calculation period will end on April 13. Therefore, as shown in FIG. 16, the following [period 4] in which the load increase rate is the maximum between April 11 and April 13 is the large load increase rate information 27 by the maximum load increase rate update unit 15. It is set as (maximum load increase rate and maximum load increase rate calculation period) (STEPs 5 to 12), and is registered as mountain load increase rate information 28 by the load increase rate calculation management unit 16 (SETP13).
[Period 4]
Start date of maximum load increase rate calculation period (n) = 11 (April 11)
End date of maximum load increase rate calculation period (m) = 13 (April 13)
Maximum load increase rate = 1/3 [ton / day]

  At this stage, the load increase rate calculation management unit 16 determines that the end date m = 13 (April 13) of the maximum load increase rate calculation period is the end date (April 13) of the production plan (STEP 14). : YES), the registration of the mountain climbing load increase rate information 28 is terminated. FIG. 17 shows the result. Here, compared with FIG. 10 which is the result in the first embodiment, in the second embodiment, since the upper limit width of the load increase rate calculation period is small, one more period is registered in the mountain climbing load increase rate information 28. It can be seen that the number is 3 in the first embodiment and four in the second embodiment. Therefore, it can be seen that the change in the load increase rate from April 4 to April 10 is larger in Example 2 than in Example 1.

Then, for each of the periods shown in FIG. 17 ([period 1] to [period 4]), the load crushing unit 17 reallocates the load by regarding the load increase rate as the production capacity of the process. (STEP 16-18). FIG. 18 shows the result of reassigning the load. Here, when FIG. 18 is compared with FIG. 11 which is the result in the first embodiment, for example, the following can be understood.
● Due to the difference in the load increase rate from April 4 to April 10, the load in Example 2 (FIG. 18) has changed greatly since April 6. In the first embodiment (FIG. 11), no load change occurs.
● In Example 1, the load change is small, but the order 6 with the delivery date of April 6 has already been produced on April 5 the day before the delivery date, and there is a wait until the delivery date (shipping date). doing. On the other hand, in Example 2, the order 6 has been produced on the delivery date (shipping date), and no waiting has occurred.

  In this way, it can be seen from this embodiment that load adjustment can be performed with an emphasis on reducing the waiting time for shipment rather than load leveling by reducing the upper limit of the load increase rate calculation period width. On the contrary, it is assumed that load adjustment can be performed with an emphasis on load leveling by increasing the upper limit of the load increase rate calculation period width.

  Therefore, with the production plan creation device, production plan creation method, and production plan creation program of this embodiment, it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of process capability. I understand that.

DESCRIPTION OF SYMBOLS 1 Production plan preparation apparatus 11 Load pile part 12 Load accumulation calculation part 13 Load increase rate calculation part 14 Load increase rate calculation period update part 15 Maximum load increase rate update part 16 Load increase rate calculation management part 17 Load load break part 21 Order information (Order information storage)
22 Load accumulation result 23 Load accumulation calculation result 24 Load increase rate calculation start time section 25 Upper limit width of load increase rate calculation period 26 Load increase rate calculation period 27 Maximum load increase rate information 28 Load increase rate information 29 for mountain climbing 29 Mountain collapse result STEP1 Order information storage step STEP2 Load pile step STEP3 Load accumulation calculation step STEP1, 4, 6, 7, 11, 12 Load increase rate calculation period update step STEP8 Load increase rate calculation step STEP5, 9, 10 Maximum load increase rate update step STEP13 -15 Load increase rate calculation management step STEP16-18 Load crushing step

Claims (12)

A production plan creation method that creates a production plan by allocating the loads of multiple orders that are production targets to multiple time segments on the time axis that are separated by a predetermined width from the start to the end of the production plan. Because
The processing executed by the computing unit of the computer is
An order information storage step of registering delivery times and loads of the plurality of orders as order information;
A load stacking step of stacking the loads of the plurality of orders into time segments corresponding to the delivery dates of the plurality of orders, and outputting as a load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. Load accumulation calculation step of accumulating the load and outputting as a load accumulation calculation result;
A load increase rate calculation step of calculating, as a load increase rate, an increment of load accumulation in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period based on the load accumulation calculation result;
With the start time segment of the load increase rate calculation period being fixed, the load increase rate calculation period is set in units of time segments between the start time segment of the production plan and the end time segment of the production plan. A load increase rate calculation period update step to update and change,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update step,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period Load increase rate calculation management step to update the time division,
In the maximum load increase rate calculation period registered in the load increase rate information for the mountain break, the load load break step for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation method characterized by comprising: The load increase rate calculation period update step further includes:
The production plan creation method according to claim 1, wherein the load increase rate calculation period is changed in units of time segments within a preset upper limit. In the state where the load increase rate calculation period update step fixes the start time section of the load increase rate calculation period with the start time section of the production plan as an initial value, the width of the load increase rate calculation period is set to the production plan. Updated by increments of time segments until the end time segment of
The load increase rate calculation management step determines the end of update of the width of the load increase rate calculation period based on whether the end time segment of the load increase rate calculation period is an end time segment of the production plan, The maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start time section of the load increase rate calculation period is changed from the maximum load increase rate calculation period to the future direction of the time axis. Update to the next time zone moved to
The load leveling step determines the end of the registration of the load level increase rate information for leveling based on whether or not the end time segment of the maximum load rate increase rate calculation period is the end time level of the production plan, in the maximum load increase rate calculation period registered in the load increase rate information for, and regards the maximum load increase rate corresponding to the process capability, to claim 1 or 2, characterized in that to reassign the load The production plan creation method described.
The load increase rate calculation period update step further includes:
If the load completion time segment of the increase rate calculation period is determined whether the load accumulated computation time segment, the end epoch the load accumulated computation time segment of the load increase rate calculation period, the load increase rate computation If the end time section of the load increase rate calculation period is not the load accumulated calculation time section, the load increase rate calculation period is not updated and the load increase rate calculation period is changed. 4. The production plan creation method according to claim 3 , further comprising changing the time unit .
A production plan creation program that allocates the load of multiple orders that are production targets to multiple time segments on the time axis that are separated by a predetermined width from the start to the end of the production plan, and creates a production plan Because
An order information storage step of registering delivery times and loads of the plurality of orders as order information;
A load stacking step of stacking the loads of the plurality of orders into time segments corresponding to the delivery dates of the plurality of orders, and outputting as a load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. Load accumulation calculation step of accumulating the load and outputting as a load accumulation calculation result;
A load increase rate calculation step of calculating, as a load increase rate, an increment of load accumulation in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period based on the load accumulation calculation result;
With the start time segment of the load increase rate calculation period being fixed, the load increase rate calculation period is set in units of time segments between the start time segment of the production plan and the end time segment of the production plan. A load increase rate calculation period update step to update and change,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update step,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period Load increase rate calculation management step to update the time division,
In the maximum load increase rate calculation period registered in the load increase rate information for the mountain break, the load load break step for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation program characterized by having a computer read out by a calculation unit and executing processing of each step. The load increase rate calculation period update step further includes:
6. The production plan creation program according to claim 5, wherein the load increase rate calculation period is changed in units of time sections within a preset upper limit. In the state where the load increase rate calculation period update step fixes the start time section of the load increase rate calculation period with the start time section of the production plan as an initial value, the width of the load increase rate calculation period is set to the production plan. Updated by increments of time segments until the end time segment of
The load increase rate calculation management step determines the end of update of the width of the load increase rate calculation period based on whether the end time segment of the load increase rate calculation period is an end time segment of the production plan, The maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start time section of the load increase rate calculation period is changed from the maximum load increase rate calculation period to the future direction of the time axis. Update to the next time zone moved to
The load leveling step determines the end of the registration of the load level increase rate information for leveling based on whether or not the end time segment of the maximum load rate increase rate calculation period is the end time level of the production plan, in the maximum load increase rate calculation period registered in the load increase rate information for, and regards the maximum load increase rate corresponding to the process capability, to claim 5 or 6, characterized in that to reassign the load The production plan creation program described.
The load increase rate calculation period update step further includes:
If the load completion time segment of the increase rate calculation period is determined whether the load accumulated computation time segment, the end epoch the load accumulated computation time segment of the load increase rate calculation period, the load increase rate computation If the end time section of the load increase rate calculation period is not the load accumulated calculation time section, the load increase rate calculation period is not updated and the load increase rate calculation period is changed. 8. The production plan creation program according to claim 7 , wherein the program is changed in units of time segments .
Using the computing unit of the computer, the load of multiple orders to be produced is assigned to multiple time segments on the time axis divided by a predetermined width from the start to the end of the production plan. A production planning device for creating a plan,
An order information storage unit for registering delivery times and loads of the plurality of orders as order information;
A load stacking unit that loads the loads of the plurality of orders into time segments corresponding to the delivery dates of the plurality of orders, and outputs the load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. A load accumulation calculation unit for accumulating the load and outputting as a load accumulation calculation result;
A load increase rate calculation unit that calculates, as a load increase rate, an increment of load accumulation in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period based on the load accumulation calculation result;
With the start time segment of the load increase rate calculation period being fixed, the load increase rate calculation period is set in units of time segments between the start time segment of the production plan and the end time segment of the production plan. A load increase rate calculation period update unit to update and change,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update department,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period A load increase rate calculation management section for updating the time segment;
In the maximum load increase rate calculation period registered in the load increase rate information for mountain break, the load load break portion for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation device characterized by comprising: The load increase rate calculation period update unit further includes:
10. The production plan creation apparatus according to claim 9, wherein the load increase rate calculation period is changed in units of time sections within a preset upper limit range. In the state where the load increase rate calculation period update unit fixes the start time section of the load increase rate calculation period with the start time section of the production plan as an initial value, the width of the load increase rate calculation period is set to the production plan. Updated by increments of time segments until the end time segment of
The load increase rate calculation management unit determines the end of update of the width of the load increase rate calculation period based on whether the end time segment of the load increase rate calculation period is an end time segment of the production plan, The maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start time section of the load increase rate calculation period is changed from the maximum load increase rate calculation period to the future direction of the time axis. Update to the next time zone moved to
The load landscaping unit determines the end of registration of the landslide load increase rate information based on whether an end time section of the maximum load increase rate calculation period is an end time section of the production plan, and the landslide in the maximum load increase rate calculation period registered in the load increase rate information for, and regards the maximum load increase rate corresponding to the process capability, to claim 9 or 10, characterized in that to reassign the load The production plan creation device described.
The load increase rate calculation period update unit further includes:
If the load completion time segment of the increase rate calculation period is determined whether the load accumulated computation time segment, the end epoch the load accumulated computation time segment of the load increase rate calculation period, the load increase rate computation If the end time section of the load increase rate calculation period is not the load accumulated calculation time section, the load increase rate calculation period is not updated and the load increase rate calculation period is changed. The production plan creation device according to claim 11 , wherein the production plan creation device further changes the time division unit .