JP3045075B2 - Production scheduling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production scheduling apparatus and method, and more particularly to a production scheduling method for producing a production plan in a production factory or the like, in which each order is used for producing order information. The present invention relates to a production scheduling method in a load planning process for examining whether resources such as equipment and tools are sufficient.

[0002]

2. Description of the Related Art Conventionally, this type of production scheduling system merely evaluates how much the cumulative capacity exceeds the cumulative load during the production plan adjustment period, and judges whether or not the production is possible as a whole. Was. In addition, the load was broken and adjusted between time buckets and the process where the plan creation period was divided at regular intervals.

[0003] In addition, while varieties are assigned to equipment by simulation, actual production conditions are predicted.

[0004]

The first problem is that there is an error in determining whether or not production is possible.

[0005] The reason is that the evaluation is performed based on the cumulative load and the cumulative capacity. Here, the cumulative load is the load determined for each type of equipment without limiting the equipment to be used, and then accumulated.The cumulative capacity is the cumulative capacity determined for each equipment group without limiting the type of equipment. It was done. When there are a plurality of workable facilities of a production type, the production capacity of the production type changes depending on the equipment. Actually, since a plurality of varieties are produced, the same equipment cannot be used among the varieties, and a situation occurs in which different equipment is used. The reason is that the relationship between the load and the capacity in this case cannot be determined by the accumulated value.

The second problem is that the processing takes a long time, and the required processing capacity and storage capacity of the hardware and the like for the processing increase and the cost increases.

[0007] Furthermore, if a plurality of resource conditions such as jigs and tools are taken into account in addition to the equipment, further processing time is required.

[0008] The reason is that the state of load and capability is to be grasped in a time series in consideration of the load generation timing.

An object of the present invention is to formulate a highly accurate production plan in a short time.

[0010]

SUMMARY OF THE INVENTION A production schedule of the present invention is provided.
The ring method includes a plan column (1 in FIG. 1) for displaying the product type in the production plan, a planned number column (2 in FIG. 1) for displaying the required number of operations required for the production plan for each type. A capacity column (4 in FIG. 1) provided for each type of equipment and displaying the number of possible operations for each type of equipment, and an allocation column (5 in FIG. 1) provided for each type of equipment and displaying the number of allocated equipment for each type of equipment. ), A difference column (9 in FIG. 1) for displaying the difference obtained by subtracting the required number of operations from the production amount, which is the number of operations that can be performed by the assigned number of units for all types of equipment, An equipment unassigned column (1 in FIG. 1) indicating the number of unassigned units obtained by subtracting the total number of units assigned for all types.
3) Use a production scheduling display screen with
The production plan in which the difference in the difference column is negative has not been adjusted.
The value in the column of equipment allocation not completed column is available for the work with
Is divided by the number of possible operations in the capacity column
A calculation procedure for calculating the allocated number (25 in FIG. 2);
The assigned number calculated in this calculation procedure is
Fill in the assignment column for this equipment and enter
Based on the product type
If the number of units is recalculated and equipment shortage occurs, the equipment concerned
The value in the column of equipment allocation not completed
Recalculation procedure to repeat the recalculation by entering in the allocation field
(26 and 27 in FIG. 2), and correspond to this recalculation procedure.
If the difference between varieties is still negative,
However, for other facilities that have not performed the calculation procedure,
The re-calculation procedure to ensure that there is no equipment shortage.
If the difference between the applicable varieties becomes 0, the above calculation is performed for other varieties.
Executing the re-calculation procedure and the re-calculation procedure.
You.

[0011]

According to the production scheduling method of the present invention, a priority determination procedure for determining the priority of a plurality of types of products and the priority of a plurality of types of equipment for each type (41, 42 in FIG. 3); Calculation procedure (44 in FIG. 3) for calculating the number of required work required for the production plan of one type of product selected in accordance with the priority order when working with the equipment selected in accordance with the priority order; If the number of equipments exceeds the number of unallocated equipment, which is the number of equipment not yet allocated for the work of the production plan of the relevant equipment, the number of allocated equipment, which is the number of equipment to which the relevant equipment is allocated to the relevant product, is not allocated to the equipment. The equipment allocation procedure (steps 45 and 4 in FIG. 3) is performed by subtracting the required number of operations of the corresponding type from the number of allocated equipment and setting the number as the difference of the corresponding type.
7, 48), and after the execution of the equipment allocation procedure, the calculation procedure is executed with the difference of the corresponding product type as the required work number for the equipment of the next priority, and the required equipment number calculated in the calculation procedure is calculated as the required equipment number. Performing the calculation procedure and the equipment allocation procedure for a product of the next priority when there is no equipment of the next priority when the equipment allocation unfinished number is equal to or less than and after the execution of the equipment allocation procedure ,
If the number of required equipment calculated in the calculation procedure is equal to or less than the number of unallocated equipment of the corresponding equipment and there is no product of the next priority, the process is terminated.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is used in a first embodiment of the present invention.
It is a diagram of the production scheduling for the display screen that. This display screen for production scheduling allocates work for production planning in one production process to multiple types of equipment, checks whether work is possible for this allocation,
If work is not possible, the number of work shortages is displayed, and if work is possible, the remaining number of equipment not allocated to production is displayed.

In FIG. 1, in the column of plan 1 at the left end, product types (QFP64P2.7, QFP8
0P2.7, QFP120P3.0) are displayed, and the number of work required to achieve the production plan of each type is displayed in the column of the number of plans 2. Following the planned number 2, the facilities 3 that can be used in this process are displayed side by side in the upper column, and the capacity (for example, the number of production per day) for each type of the plan 1 is displayed in the capacity 4 column provided for each of the facilities 3. Is done. If the capacity 4 is displayed as 0, it indicates that the corresponding facility cannot perform work for the corresponding type.

In the column of allocation 5 provided for each of the facilities 3, the number of allocated facilities 3 for each type of the plan 1 is displayed. The value obtained by multiplying the value of the capacity 4 by the value of the assignment 5 is the work amount of the corresponding type in the corresponding facility. If work can be performed with a plurality of facilities for each type of plan 1, other facilities are also allocated, and the total work volume of each facility is displayed in the column of the production amount 6 of 6, and the total of used facilities is 8 is displayed. In the column of the difference 9, a difference which is a difference between the value of the production amount 7 and the value of the planned number 2 is calculated and displayed. Further, the total of the allocations 5 of the facilities 3 is displayed in the column of the total number of facilities 10 on the lower side of FIG. If the total number of equipments 10 exceeds the number of owned equipments 11, the excess number is displayed as the number of equipment shortages in the column of equipment shortage information 12, and if the total number of equipments 10 is less than the number of owned equipments 11, the number is satisfied. The number that does not exist is displayed as a surplus equipment in the column of equipment allocation not completed 13.

Contents of equipment 3 (equipment A, equipment B), plan 1
Of the product type, the planned number 2, the capacity 4, and the owned equipment number 10 are read out from a storage device (not shown) and displayed, and the contents of the assignment 5 are inputted from a keyboard (not shown). Further, these data are calculated by a processing unit (not shown) to calculate the production amount 7, equipment 8, difference 9,
The columns of the total number of facilities 10, the facility shortage information, and the facility assignment not completed 13 are displayed.

FIG. 2 shows a processing procedure of an example of a production scheduling method using the production scheduling display screen shown in FIG.

Referring to FIG. 1 and FIG. 2, a processing procedure for calculating a producible amount for a production plan will be described.

Procedure 1. It is checked whether there is a non-adjusted variety of the plan 1 with the difference 9 being negative [21]. (The corresponding reference number in the figure is shown in []. The same applies hereinafter.) If there is no such information, the process is terminated [29]. The production amount 7 at that time represents the production amount with respect to the facility capacity.

Procedure 2. If there is a type of the plan 1 in which the difference 9 is minus, it is checked whether there is a workable facility 3 [22]. If it does not exist, another type of the remaining plan 1 is targeted [30].

Procedure 3. It is confirmed whether or not the capability 4 of the facility 3 capable of working for the product of the plan 1 with the difference 9 minus is present [23]. If it does not exist, other equipment 3 is targeted [31]. If there is no workable equipment, the other types of the remaining Plan 1 are targeted.

Procedure 4. Equipment assignment not completed for applicable equipment 1
It is checked whether a number exists in 3 [24]. If it does not exist, the next facility 3 is targeted [32]. If there is no workable equipment, the other types of the remaining Plan 1 are targeted.

Procedure 5 The number of facilities is calculated by dividing the number of plans 2 by the capacity 4 [25].

Procedure 6. The result of step 5 is input to assignment 5 as the number of assignments.

Procedure 7. Production volume 7, equipment 8, difference 9, total equipment number 10, equipment shortage information 12, equipment allocation not completed 1
3 is recalculated [27].

Procedure 8. The recalculation result is evaluated [28].
Equipment allocation not completed for equipment with insufficient equipment number 13
Is the number of equipments allocated [33]. If the difference 9 for the corresponding product type in Plan 1 is negative, other equipment is targeted [34]. If there is no problem, target other varieties of the plan.

Next, a production scheduling method according to a second embodiment of the present invention will be described in detail with reference to FIG. FIG. 3 is a flowchart illustrating an example of a process when the equipment is automatically allocated. In this processing, the workable amount for the owned equipment can be calculated.

Procedure 1. Priorities are determined for varieties to be subjected to a production plan [41]. For example, they are determined in order of delivery date.

Procedure 2. The type of the target plan determines the priority of using the equipment [42]. For example, it is determined in the order of the ability.

Procedure 3. A set of the highest priority type of the plan and the highest priority type of the equipment is created [43].

Procedure 4. The required number of facilities when the number of works of the corresponding type is worked in the corresponding facility is calculated [44].

Procedure 5 It is checked whether the required number of facilities exceeds the unallocated number, which is the number of the facilities that have not yet been allocated to the production plan [45]. If it does not exceed, it is checked whether or not there is a product of the next priority order [46].

Procedure 6. The next priority type and the set of the highest priority equipment for the relevant type are determined [5.
0]. Then, the required number of equipment is calculated again [4
4].

Procedure 7. If the required number of equipments exceeds the number of unallocated equipment in step 5 [45], the number of unallocated equipment before the current allocation is set as the number of allocated equipment for the corresponding product [47].

Procedure 8. The number of works corresponding to the number of assigned facilities is subtracted from the work for planning of the corresponding product in the plan, and the remaining work number is set as a difference [48].

Procedure 9. If there is a next-priority facility [49], the corresponding type and the next-priority facility are determined as allocation targets [51], and then the required number of facilities is calculated again [44]. In the processing 44 again, the difference of the corresponding type is set as the number of operations. If there is no equipment of the next priority [49], a plan of the next priority and the highest-priority equipment of the type of the corresponding plan are determined as allocation targets [50].
I do.

In the production scheduling method of the present embodiment, data on the type and equipment are stored in a storage device and processed by a program control using an information processing device. The content can be displayed on a display screen similar to the one shown.

Next, a production scheduling method according to a third embodiment of the present invention will be described in detail with reference to FIG.
In the processing shown in FIG. 4, if there is no equipment having the next priority in the processing 49, the processings 52 and 53 are performed and then the processing 50
The process is the same as that shown in Fig. 3 except that the process moves to Fig. 3. In this process, it is possible to calculate the required number of equipment for the planned production number.

If there is no equipment of the next priority in the process 49, the necessary total number of equipment when the difference is worked with the highest priority equipment of the corresponding type is calculated [52], and the calculated total number of equipment is calculated. The number obtained by subtracting the number of owned equipment from the above is set as the number of equipment shortage information of the highest priority equipment [53].

Next, a production scheduling display screen according to a fourth embodiment of the present invention will be described in detail with reference to FIG. FIG. 5 shows a screen for confirming the number of retained jigs and the number of remaining jigs. In FIG. 5, the tool name 61 is displayed in the leftmost column,
Used equipment 62 for jig / tool name 61, ability 63 determined from equipment and jig / tool, number of held jig / tool 64, number of assigned 6
5. The remaining number 66 is displayed.

FIG. 6 shows a processing procedure of the embodiment of the present invention shown in FIG. 5, and is the same as FIG. 2 except that a processing 35 is performed instead of the processing 27.

The number of equipment allocated is calculated for the type and equipment of the plan selected in the processes 21 to 24 [25], and this is input to the allocation 5 of the relevant type and equipment, and the production amount 7, the equipment 8, the difference 9, After recalculating the total number of equipments 10, the equipment shortage information, and the equipment allocation not completed 13, the number of jigs and tools used in the used equipment 62 of the corresponding type is calculated and displayed as the remaining number 66 from the holding number 64 [35] ].

[0044]

The first effect is that a load plan can be made with high accuracy.

The reason is that the equipment is allocated to the work for each type in the production plan, and in the actual execution of the plan, the other types use the corresponding equipment and the equipment originally planned is not used. This is because it is possible to avoid occurrence of a variety that cannot be used and cannot be produced.

The second effect is that the processing time can be reduced. Furthermore, the processing time can be shortened by automatically assigning without actually inputting by the planner. At the same time, information on a plurality of resources such as jigs and tools can be handled.

The reason is that by allocating to equipment without dealing with time-series information, a planner can make a load plan on a screen and perform automatic allocation.

[Brief description of the drawings]

FIG. 1 is a diagram of a production scheduling display screen used in a first embodiment of the present invention.

FIG. 2 is a flowchart showing a procedure of a production scheduling method using the production scheduling display screen shown in FIG.

FIG. 3 is a flowchart illustrating a procedure of a production scheduling method according to a second embodiment of the present invention.

FIG. 4 is a flowchart illustrating a procedure of a production scheduling method according to a third embodiment of the present invention.

FIG. 5 is a diagram of a display screen for production scheduling according to a fourth embodiment of the present invention.

6 is a flowchart showing a procedure of a production scheduling method using the production scheduling display screen shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 plan 2 number of plans 3 equipment 4 capacity 5 allocation 6 total 7 production 8 equipment 9 difference 10 total equipment number 11 owned equipment number 12 equipment shortage information 13 equipment allocation not completed 61 jig tool name 62 used equipment 63 capacity 64 holding number 65 Assigned 66 Remaining

Claims (4)

(57) [Claims] 1. A meter for displaying a product type in a production plan.
Displays the number of required work required for production planning for each product type.
Column for the number of plans
Capacity column to display the number of possible operations for each type of
Assignment for each type of equipment provided for each
Column to display the number of units
This is the number of work that can be performed for the equipment for the assigned number.
Difference that displays the difference obtained by subtracting the required number of operations from the production volume
For all varieties from the number column and the number of units owned for each equipment
Unassigned units obtained by subtracting the total number of units assigned
Production schedule including equipment assignment not completed column
Using the ring display screen, the difference in the difference column is minus
Can work on a product whose production plan is not yet adjusted.
The capacity of the equipment for which the value of the incomplete column is not 0
Calculate the number of assigned units by dividing the difference by the number of possible operations in the power column.
Calculation procedure to be issued and the allocation table calculated by this calculation procedure
Enter the number in the above-mentioned assignment column for the relevant product and the relevant equipment.
Difference of applicable varieties and applicable
Recalculation of the number of unallocated equipment causes equipment shortage
If an error occurs, the value in the above-mentioned equipment allocation not completed column for the relevant equipment
Enter the above in the assignment column for the relevant product
A recalculation procedure for repeating the recalculation.
If the difference between the varieties is still negative,
For other facilities that have not yet performed the calculation procedure,
The above calculation procedure is executed, and it is determined that equipment is insufficient in the recalculation procedure.
If the difference between the varieties becomes 0 and other varieties are not
Performing the calculation procedure and the recalculation procedure.
Characteristic production scheduling method. 2. The priority order of a plurality of product types and the product type.
Prioritize multiple types of equipment for each
Ranking procedure and production of one variety selected according to priority
The number of operations required for production planning is selected according to priority.
Calculation procedure for calculating the required number of equipment when working with
The required number of equipment calculated by this calculation procedure is still
Units not allocated for production planning work
If the number of equipment allocations has not been exceeded, the applicable equipment
Is the number of equipment to be allocated,
Assigned the number of work required for the corresponding type as the number of unallocated
Equipment allocation that is calculated by subtracting the number of equipment from the number of equipment and calculating the difference between the applicable models
Ri hit and a procedure, after the execution of this equipment allocation procedure
Necessary work for the difference of the applicable type for the equipment of the following priority
Execute the calculation procedure as a number, and calculate by the calculation means.
Required equipment is less than or equal to the number of equipment that has not been allocated
At the time of and after execution of the equipment allocation procedure
If there is no equipment of the next priority,
Performing the calculation procedure and the equipment allocation procedure,
The required number of equipment calculated in the calculation procedure is
There are no varieties with the next priority below the
A production schedule characterized by terminating the process if any
Ring method. 3. The following priority after the equipment allocation procedure is performed.
If there is no equipment at the
Necessary equipment when working with the highest priority equipment for this type
Number of equipment that is insufficient to allocate the number to the highest priority equipment
Is calculated, and the above-described calculation procedure is performed for the next priority type.
3. The production schedule according to claim 2, wherein the production schedule is carried out.
-Ring method. 4. The number of tools of each type is stored and stored.
And recalculate in the recalculation procedure.
Calculate the number of jigs and tools used for the equipment, and
2. The method according to claim 1, wherein the number of remaining jigs and tools is determined.
Production scheduling method.