JP3307290B2 - Inventory management method, inventory management device, and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for managing the types of products to be stocked and their stock amounts based on the actual order quantities of a plurality of types of products, an apparatus used for carrying out the method, and The present invention relates to a machine-readable recording medium on which the program is recorded.

[0002]

2. Description of the Related Art In inventory management, in which each product is stored in a predetermined proper inventory based on the actual order quantities of a plurality of types of products and the inventory of the products is managed, a predetermined evaluation index is used. It is important to determine each appropriate stock amount in a short time so that the required value is obtained. As a method of determining such an appropriate stock amount, a method of calculating the appropriate stock amount T using the following equation (1) has been proposed. T = L × μ + S × √L × σ (1) L: Procurement period, which is the period from product ordering to product stocking μ: Average order volume within the management target period S: Safety coefficient σ: Standard deviation of order volume

When inventory management of a plurality of products is performed by this method, an appropriate inventory amount is calculated for each item by using the equation (1). When the quantity reached, they ordered products for each item. However, such a method has the following problems.

Now, suppose that there are two products A and B having the same safety factor S and the same procurement period L for order A and order B, which set the ratio of the number of out-of-stocks to the number of orders to a predetermined value. The total appropriate stock amount T _{A + B} of the products A and B obtained by the above-described method is given by the following (2).
It is expressed like a formula. _{T A + B = T A +} T B = (L × μ A + S × √L × σ A) + (L × μ B + S × √L × σ B) = L × (μ A + μ B) + S × √L × (σ _A + σ _B )… (2)

At this time, if the product A or the product B can be issued to the order A and the order B respectively, only the product A can be held as an inventory for the order A and the order B. represented by (3) a proper stock quantity T _a Hatsugi of. T _A = L × (μ _A + μ _B ) + S√L × σ _{A, B} (3) where σ _{A, B} : Standard deviation of the order quantity of product A and product B

In equations (2) and (3), (σ _A +
Since a _{σ B) ≧ σ A, B} , is T _{A + B} ≧ T A. As described above, when the product A that is substituted for the product A for the order A and the product B for the order B is held as inventory, the product A for the order A and the product B for the order B are separately held as inventory as described above. In this case, the total inventory can be reduced.

As a method for managing the inventory of a plurality of products including this substitutable product, Toshio Nishida, Hiroaki Ishii and Takio Shimonaka, "Three-Item Inventory Management System Considering Substitution Cost", Autumn Research of OR Society of Japan In the presentation abstracts, p.144 (1982), product a can be substituted for product b and product c, and product b is preset for three products A, B, and C that can be substituted for product c. It proposes a method of formulating the model thus obtained and calculating the items to be stocked and the appropriate stock quantity so that the stock cost, which is the cost required when the product is stored as stock for a predetermined period, is minimized.

[0008]

However, in the above-described conventional method, each time the number of replaceable products or the conditions of replacement are changed, a model corresponding to the change must be formulated. However, there is a problem that it takes much time to formulate the model. Furthermore, as the number of replaceable products increases, and as the conditions for replacement increase, the formulation of models becomes more difficult, and it becomes difficult to determine the items to be replaced and determine the appropriate inventory of each product. There was a possibility that it could not be done.

The present invention has been made in view of the above circumstances, and has as its object the purpose of each product type, the type being a core element, and the use of other products that can be replaced with the product of the core element. One or more product sets each of which type is an element are generated, one or more product sets satisfying a predetermined condition are selected, and an appropriate stock amount of core element products included in the selected product set is obtained. Therefore, even if there are many types of products that can be replaced and the conditions of replacement are various, an inventory management method that can easily determine the types of products to be stocked and the appropriate stock quantity thereof, and are used for implementing the methods. And a machine readable recording medium on which the program is recorded.

[0010]

According to a first aspect of the present invention, there is provided an inventory management method, wherein a computer uses a computer to respond to a plurality of types of orders with a corresponding type of product or another type of product that can be replaced with that type of product. In order to issue a product, the type of product to be received and its proper inventory are determined based on the actual order quantity of each type of order and predetermined conditions, and multiple types of products are obtained using the obtained appropriate inventory. In the method of managing the inventory of the products, the alternative information between the products stored in the storage unit is read out.
And, by type of calculator products, the type is a nuclear element, the type of other products that may be replaced by the product of the nucleic element is an element one or more of the products set to generate, respectively, then
Read and calculate the core elements included in each product set and the actual order quantity corresponding to each element from the database
The unit calculates the appropriate stock amount of each product set, selects one or more product sets that satisfy the above-mentioned condition from a plurality of product sets generated for each product type, and includes a core element included in the selected product set. The appropriate stock amount of the product is determined as the appropriate stock amount of the product set, and the appropriate stock amount of the other types of products is set to zero.

[0011] The inventory management method according to the second aspect of the present invention, computer
For each type of order, when issuing a corresponding type of product or another type of product that can be substituted for that type of product for multiple types of orders, the performance of each type of order for each of multiple unit periods based on the order amount and the predetermined condition, determine the kind and the proper amount of stock to be warehousing product, a method of managing an inventory of a plurality of types of products using the optimum inventory amount obtained, stored in the storage unit Alternative information between products
Read, the calculation unit generates one or a plurality of product sets in which the type is a core element, the type is a core element, and another product type that can be substituted for the core element product is an element,
In addition, the minimum actual order quantity is obtained from each actual order quantity of each type of order stored in the database, and the calculation unit subtracts the corresponding minimum actual order quantity from each actual order quantity, Using the core elements included in the product set and the actual order quantities obtained by subtracting the orders corresponding to the elements, the appropriate stock quantity of each product set is calculated and generated for each product type from the storage unit. Read out multiple product sets and calculate
The department selects one or a plurality of product sets satisfying the above conditions, and determines the appropriate stock quantity of the core element products included in the selected product set by the appropriate stock quantity of the product set and the minimum performance related to the core element products. The amount is calculated using the order quantity, and the appropriate stock quantity of another type of product is calculated using the minimum actual order quantity of the product of the type.

[0012] The inventory management apparatus according to the third aspect of the present invention, when a product of a corresponding type or another type of product that can be substituted for the product of the type is delivered to a plurality of types of orders, the order management of each type of order. Based on the actual order quantity and the predetermined conditions,
A computer-based device that determines the types of products to be stocked and their appropriate inventory, and manages the inventory of multiple types of products using the obtained appropriate inventory .
A storage unit storing the alternative information; and a calculation unit.
The setting unit reads the replacement information from the storage unit , and for each product type, one or more product sets in which the type is a core element and the other product type that can be replaced by the product of the core element is an element the means to generate respectively, reads the actual order of the corresponding order respectively to nuclear elements and elements included in each product set from the database, and means for calculating the optimum inventory quantity for each product set respectively, generated by type of product Means for selecting one or a plurality of product sets satisfying the above condition from the plurality of product sets obtained, and means for determining an appropriate stock amount of core element products included in the selected product set as an appropriate stock amount of the product set. and characterized in that it comprises a <br/> hand stage to determine the proper amount of stock for other types of products to zero.

According to a fourth aspect of the present invention, there is provided an inventory management apparatus, wherein a plurality of unit periods are output when a corresponding type of product or another type of product that can be substituted for the type of product is delivered to a plurality of orders. Based on the actual order quantity of each type of order and the predetermined conditions, the type of product to be stocked and the appropriate stock quantity are obtained, and the inventory of multiple types of products is managed using the obtained appropriate stock quantity. Using a computer
That the device has been stored alternative information between product storage
And a calculation unit, and the calculation unit stores the substitute information from the storage unit.
It reads, by type of product, the type is a nuclear element, means to generate respective one or more products sets variety of other products that may be replaced by the product is an element of the nucleic element,
Include the minimum actual order quantity from each actual order quantity of each type of order which is stored in a database hand stages respectively obtained, the corresponding minimum actual hand stage order amount subtraction process respectively, products that collectively from the actual order volume using subtraction processed results ordered quantity of the order corresponding to the nuclear elements and elements from a plurality of product sets generated hand stage, the products type configured to calculate the optimum inventory quantity for each product set, the condition one or a plurality of means to select a product set to satisfy, the proper amount of stock the product of nuclear elements that are included in the product set you choose, order minimum track record related to the product of the proper amount of stock and nuclear elements of the product set hand stage to calculate using the amounts, and other types of proper stock quantity of a product, characterized in that it comprises a means to calculate using the minimum actual order amount according to the type of product.

[0014] A recording medium according to a fifth aspect of the present invention is a computer.
In order to manage the inventory of each type of product when issuing a corresponding type of product or another type of product that can be substituted for that type of product for a plurality of types of orders, Based on the actual order quantity and conditions of the order type,
On a machine-readable recording medium on which a program for determining the type of product to be stored and the appropriate stock amount is stored , the computer is stored in the storage section.
By reading the substitution information between products, one or a plurality of product sets are generated for each product type in which the type is a core element and another product type that can be substituted for the product of the core element is an element. Means, means for reading the actual order quantity of the order corresponding to each of the core elements and elements included in each product set from the database, and calculating the appropriate stock quantity of each product set, respectively, and a plurality of means generated for each product type. Means for selecting one or a plurality of product sets satisfying the above condition from the set of products, and means for setting the appropriate stock quantity of the core element products included in the selected product set to the appropriate stock quantity of the product set. And a program for functioning as a means for setting the appropriate stock amount of other types of products to zero.

A recording medium according to a sixth aspect is a computer.
In order to manage the inventory of each type of product when issuing a corresponding type of product or another type of product that can be substituted for that type of product for a plurality of types of orders, On a machine-readable recording medium in which a program for obtaining the type of product to be stored and its proper inventory amount is recorded based on the actual order amount and conditions of each type of order for each unit period ,
Reads alternative information between products stored in the storage unit
Te, by type of product, the type is a nuclear element, and means to generate respective one or more of the products set a variety of other products that may be replaced by the product of the nucleic element element data
Means for obtaining the minimum actual order quantity from each actual order quantity of each type of order stored in the base; means for subtracting the corresponding minimum actual order quantity from each actual order quantity; and Means for calculating the appropriate stock quantity of each product set using the core elements to be processed and the actual order quantities obtained by subtracting the orders corresponding to the elements, and a plurality of product sets generated for each product type. Means for selecting one or more product sets that satisfy
Means for calculating the appropriate inventory of core product (s) in the selected product set using the appropriate inventory of the product set and the minimum actual order quantity for the core product (s); and A program for functioning as a means for calculating the appropriate stock amount using the minimum actual order amount of the product of the type is recorded.

In the first, third and fifth inventions, for example, there are products A, B and C corresponding to orders A, B and C, respectively.
If a product of a type other than the corresponding product can be delivered for each order, the type of the product to be received and the appropriate stock amount are obtained as follows.

For each of the products A, B, and C, a product set that is a combination of the product and a product that can be replaced by the product is generated. Based on the premise described above, the product set for product A is {A}, {B, A }, {C, A} and {C, B,
A｝. At this time, A is a core element, and B and C are elements. A product set related to the product B and the product C is generated as before. Each product set {A}, {B, A }, {C, and so on is used using the unit period of inventory management, for example, the average and standard deviation of the order quantities of orders A, B and C every month .
A}, {C, B, A}, ... respectively calculates the proper amount of stock.

A set {A} of a plurality of generated product sets,
From {B, A }, {C, A}, { C, B, A},.
One or a plurality of product sets that satisfy the actual order quantity of all types of orders and satisfy the conditions of reducing manufacturing costs or inventory costs are selected according to, for example, a branch and bound method.
Then, for example, if a product set {C, B, A} is selected from the set of a plurality of product sets described above, the product A corresponding to the core element A of the product set is replaced with the product B and the product C. At the same time, it is determined that the goods are to be stored, the proper stock amount of the product A is set to the proper stock amount of the product set {C, B, A}, and the proper stock amounts of the products B and C are set to zero.

The inventory management method according to the second, fourth, and sixth aspects of the present invention is the inventory management method according to the present invention, wherein the minimum actual order quantity of order A is selected from the actual order quantities of order A, order B and order C for each unit period of inventory management. a, the minimum actual order quantity b of the order B, and the minimum actual order quantity c of the order C, respectively. Then, the minimum actual order quantity a is subtracted from each actual order quantity of order A, and the minimum actual order quantity b is subtracted from each actual order quantity of order B, respectively.
The minimum actual order quantity c is subtracted from each actual order quantity of the order C, and the subtracted actual order quantity is obtained.

The product set {A}, {B, A }, {C,
Calculate the appropriate stock amount of A｝, 適 正 C, B, A｝,. Also, a set of product sets {A}, {B, A} , {C,
From A｝, ｛ C, B, A｝,...｝, A combination of product sets that satisfies the conditions such as satisfying the actual order quantity of all kinds of orders and reducing the manufacturing cost or the inventory cost is selected as before. I do. At this time, assuming that the product set {C, B, A} is selected, the appropriate stock quantity of the product A corresponding to the core element A is changed to the appropriate stock quantity of the product set {C, B, A} (the minimum actual quantity). It is determined to be a value obtained by adding a calculated value of order quantity a) × (period from ordering product A to unit storage for unit period). Product B and Product C
Is obtained by multiplying the minimum actual order quantity b and the minimum actual order quantity c by the (period from when the product A is ordered to the unit period until the product A is received), respectively. As a result, a part of each type of product can be replaced by another type of product, so that the total inventory amount can be reduced and the cost required for the replacement can be reduced.

[0021]

Embodiments of the present invention will be specifically described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of an apparatus used for carrying out the present invention. FIG. 2 is a diagram showing a computer 1 shown in FIG. 9 is a flowchart showing a procedure for performing the operation. When the substitute information defining the item of the replaceable product is input from the input unit 3 such as a keyboard or a mouse, the CPU 2 gives it to a predetermined address of the storage unit 5 and stores it there (steps S1 and S2). .

FIG. 5 is a chart for explaining an example of the alternative information. In the example shown in FIG. 5, for the order A, the product A, the product B or the product C can be delivered.
, The product B or the product C can be delivered, but the product A cannot be delivered. In addition, the product C can be delivered to the order C, and the product A or the product Z can be delivered to the order Z.

The CPU 2 waits until an execution command for determining an item of a product to be stored and its proper stock amount is input (step S3), and when it is input, for example, every one month, for example, one month. , The actual order quantity database (DB) in which the actual order quantities of orders for a plurality of items are registered.
From 11, the actual order quantity for a plurality of unit periods set in advance is read out (step S 4), and it is stored at a predetermined address in the storage unit 5 (step S 5). Is started.

FIG. 6 is a chart for explaining an example of the actual order amount read from the actual order amount database 11, and shows a case where the actual order amount for the latest one year is read.
As shown in FIG. 6, the actual order volume of each order A to Z is read out for 12 months.

The calculating unit 6 refers to the substitute information stored in the storage unit 5 and generates a set of substitutable products having the product as a core element for each of the products A, B, C,. (Step S6). In FIG. 5, a product C is an order A,
B, C can be delivered. Assuming that the product C cannot be delivered for orders other than the orders A, B, and C, as an alternative product set of the product C,
{C }, {A, C}, { B, C}, {A, B, C} are generated. At this time, the core element is C.

When all the substitutable product sets have been generated for the products A to Z in this way, the calculating unit 6 calculates the inventory of the products A, B, C... The required data is read from the management information database 12 (step S7), and the appropriate stock amount O (j) of each set of replaceable products is obtained using the read data and the following equation (4) (step S8). ). O (j) = (Primary element procurement period) × (Average value of actual orders received for elements included in the set of substitutable products) + (Maximum value within the safety factor for elements included in the set of substitutable products) × √ ( procurement period of core elements ) × (standard deviation of actual orders received for elements included in the set of substitutable products) ... (4)

When the order quantity per unit period follows the normal distribution N (μ, σ ² ), the safety factor that sets the out-of-stock rate, which is the ratio of the out-of-stock period to the procurement period, to α is given by the following equation (5). You can ask.

[0028]

(Equation 1)

The calculating unit 6 includes, for example, an evaluation index represented by the following equation (6), an objective function represented by the following equation (7), and a constraint condition represented by the following equations (8) and (9). Is set in advance, and the calculation unit 6 selects a solution that satisfies the equations (7) to (9), that is, a combination of the set of substitutable products according to the branch and bound method as follows (step S9).

[0030]

(Equation 2)

FIGS. 3 and 4 are flowcharts showing a procedure for selecting a set of substitutable products by the calculating unit 6 shown in FIG. The calculating unit 6 sets 最適 to the optimum value Z (step S).
91). Calculation unit 6, the unfixed x _j of the elements x _j included in the solution x, computes the solution x without applying 0-1 integer constraints (9) (step S92), obtained It is determined whether the solution x is feasible or not and whether the objective function value z ≧ Z according to the equation (7) is satisfied (step S7).
93, S94), and if so, step S102 described later.
Move to

The calculating unit 6 determines in step S93 and step S93
If it is determined in step 94 that feasible and z <Z, it is determined whether the obtained solution x is an integer solution consisting of 0 and / or 1 (step S95). among the elements x _j contained in extracts only a predetermined number in the order of close to 1/2 (step S96). The calculating unit 6 calculates a value obtained by the following equation (10) for each of the extracted elements x _j (step S97), and fixes the element x _j corresponding to the smallest value to 1 (step S97). Step S9
8).

[0033]

(Equation 3)

The calculation unit 6 repeats the operations from step S92 to step S98 until it determines that the solution x is an integer solution at step S95. And the value obtained by substituting the optimum solution X into the equation (7) is set as the optimum value Z (step S100,
S101).

The calculating unit 6 determines whether backtracking is possible (step S102), and if it is possible, backtracks one by one (step S103) and fixes the corresponding element _xj to 0. After performing step S104, the process returns to step S92. The calculation unit 6 repeats the operations from step S92 to step S104 until it is determined that backtracking cannot be performed in step S102, and then determines whether or not the optimum value Z = ∞ (step S105). Z
If not, the optimal solution X is adopted (step S10).
6) If Z = ∞, it is determined that execution is not possible (step S107). This allows multiple orders A,
The products satisfying the order quantity within the predetermined period of time B,... Are stored as inventory, and a combination of a set of substitutable products whose evaluation index is the sum of the inventory cost and the substitution cost is as small as possible. it can.

Then, for each of the obtained substitutable product sets, the calculating unit 6 sets the appropriate stock quantity of the core element product to the proper stock quantity of the substitutable product set (step S10), and sets the product of the other element. Reducing the appropriate stock to zero (step S11)
By performing the respective operations, the appropriate stock amount of each of the products A, B,... Is calculated, and the obtained products A, B,.
Is displayed on the display unit 4 (step S1).
2).

(Embodiment 2) FIGS. 7 and 8 are flowcharts showing another procedure for determining an item of a product to be stored and an appropriate stock amount thereof. When the substitute information defining the item of the replaceable product is input from the input unit 3, the CPU 2
Gives it to a predetermined address in the storage unit 5 and stores it there (steps S20 and S21).

The CPU 2 waits until an execution command for determining an item of a product to be stored and an appropriate stock amount is input (step S22). When the instruction is input, the results of ordering a plurality of items per unit period are input. The actual order quantity for a plurality of unit periods set in advance is read from the actual order quantity database 11 in which the order quantity is registered (step S23), and it is stored at a predetermined address of the storage unit 5 (step S24). The calculating unit 6 selects the minimum actual order quantity for each item order (step S25). Calculation unit 6
When the minimum actual order quantity of the order of each item is selected, the minimum actual order quantity is subtracted from each actual order quantity relating to the order of the selected minimum actual order quantity (step S26), Find the order quantity.

FIGS. 9A and 9B are diagrams for explaining a method of obtaining the subtraction processing actual order quantity. FIG. 9A shows the actual order quantity read from the actual order quantity database 11, and FIG. 9B shows the subtraction processing actual order quantity. Is shown. As is clear from FIG. 9A, the minimum actual order quantities of order A, order B, and order C are 50, 49, and 124, respectively. Then, the minimum actual order quantity of 50 is subtracted from the actual order quantity of order A in each month, and the minimum actual order quantity of 49 is subtracted from the actual order quantity in each month of order B. When the minimum actual order quantity 124 is subtracted from the actual order quantity to obtain the subtraction actual order quantity, each subtraction actual order quantity shown in FIG. 9B is obtained.

The calculating section 6 refers to the substitute information stored in the storage section 5 to generate a set of replaceable products having the products as core elements separately for each of the products A, B, C... (Step S2).
7) The necessary data is read from the inventory management information database 12 (step S28), and the read data and the subtraction processing actual order quantity are applied to the equation (4) to obtain the appropriate inventory quantity O of each substitutable product set. (J) are obtained (step S29).

In the calculating section 6, an evaluation index expressed by the equation (6), an objective function expressed by the equation (7), and constraint conditions expressed by the equations (8) and (9) are set in advance. The calculation unit 6 selects a solution that satisfies the equations (7) to (9), that is, a combination of the set of substitutable products in the same manner as before (step S30).

The calculating unit 6 calculates the appropriate stock quantity of the product of the core element of each substitutable product set included in the selected combination by the following equation (11), and calculates the appropriate stock quantity of the products of the other items. It is calculated by the following equation (12) (step S
31, 32). Then, the calculation unit 6 calculates each of the obtained products A,
The appropriate stock amount of B,... Is displayed on the display unit 4 (step S33). In this way, the part exceeding the minimum actual inventory amount is
The replacement cost can be further reduced because the product is replaced with a replaceable product. (Appropriate inventory) = (Appropriate inventory of the substitutable product set) + (Minimum actual inventory) x (Procurement period) ... (11) (Appropriate inventory) = (Minimum actual inventory) x (Procurement period) … (12)

The computer program for inventory management shown in FIGS. 2 to 4 and FIGS. 7 and 8 is written in FIG. 10 in addition to being written in the ROM of the computer having the configuration shown in FIG. As described above, even when the storage medium RM such as a flexible disk or a compact disk is stored in a storage medium RM, the storage medium RM is loaded into a disk drive of a computer and loaded, and the appropriate stock amount of a plurality of items is calculated. Good.

[0044]

As described in detail above, the first, third and fifth embodiments
In the present invention, even if there are many types of products that can be replaced and the conditions for replacement are various, it is possible to easily find the types of products to be stored and the appropriate stock amount thereof.

According to the second, fourth and sixth aspects of the present invention, the portion exceeding the minimum actual stock amount is replaced with a replaceable type of product, so that the total stock amount can be reduced and the cost required for replacement is reduced. The present invention has excellent effects such as reduction of

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an apparatus used for implementing the present invention.

FIG. 2 is a flowchart showing a procedure for determining an item of a product to be stored and an appropriate stock amount by the computer shown in FIG. 1;

FIG. 3 is a flowchart showing a procedure of selecting a set of substitutable products by a calculation unit shown in FIG. 1;

FIG. 4 is a flowchart showing a procedure of selecting a substitutable product set by a calculation unit shown in FIG. 1;

FIG. 5 is a chart illustrating an example of alternative information.

FIG. 6 is a chart illustrating an example of an actual order quantity read from an actual order quantity database.

FIG. 7 is a flowchart showing another procedure for determining an item of a product to be stored and an appropriate stock amount thereof.

FIG. 8 is a flowchart showing another procedure for determining an item of a product to be stored and an appropriate stock amount thereof.

FIG. 9 is a chart for explaining a method for obtaining a subtraction processing actual order quantity.

FIG. 10 is a schematic diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Computer 2 CPU 6 Calculation part 11 Actual order quantity database 12 Inventory management information database

Continuation of the front page (56) References JP-A-3-189762 (JP, A) JP-A-5-135066 (JP, A) JP-A-5-250394 (JP, A) JP-A-6-203054 (JP) , A) Nishida et al., Inventory management system for three items considering alternative costs, Abstracts of the Abstracts of Autumn Meeting of the OR Society of Japan, Japan, The Operations Research Society of Japan, September 17, 1982, 144-145, 001, 83A 0296818 (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 17/60 116 JICST file (JOIS)

Claims (6)

(57) [Claims] When a plurality of types of orders are used to issue a corresponding type of product or another type of product that can be substituted for that type of product, the actual order quantity of each type of order And, based on predetermined conditions, the type of the product to be stored and the appropriate stock amount thereof are determined, and in the method of managing the inventory of a plurality of types of products using the obtained appropriate stock amount, the product is stored in the storage unit. Read out alternative information between existing products
Te, by type of calculator products, the type is a nuclear element, the type of other products that may be replaced by the product of the nucleic element is an element one or more of the products set to generate, respectively, then
Read and calculate the core elements included in each product set and the actual order quantity corresponding to each element from the database
The unit calculates the appropriate stock amount of each product set, selects one or more product sets that satisfy the above-mentioned condition from a plurality of product sets generated for each product type, and includes a core element included in the selected product set. An inventory management method characterized in that an appropriate inventory amount of a product set is determined to be an appropriate inventory amount of a set of products, and an appropriate inventory amount of other types of products is determined to be zero. 2. When using a computer to deliver a corresponding type of product or another type of product that can be substituted for that type of product to a plurality of types of orders, each type of each of a plurality of unit periods Based on the actual order quantity of the order and the predetermined conditions, the type of the product to be stored and the appropriate stock amount are obtained, and the method of managing the inventory of a plurality of types of products using the obtained appropriate stock amount, Reads alternative information between products stored in the storage unit
The calculation unit generates, for each product type, one or a plurality of product sets, each of which is a core element, and another product type that can be substituted for the product of the core element is an element; and
The minimum actual order quantity is obtained from each actual order quantity of each type of order stored in the database, and the calculation unit subtracts the corresponding minimum actual order quantity from each actual order quantity, and the core included in the product set is calculated. Using the elements and the actual order quantity obtained by subtracting the orders corresponding to the elements, the appropriate stock quantity of each product set is calculated, and a plurality of product sets generated for each product type are read from the storage unit , and the calculation unit Selecting one or a plurality of product sets satisfying the above condition, and determining an appropriate stock amount of core element products included in the selected product set;
Calculate using the appropriate stock quantity of the product set and the minimum actual order quantity of the product of the core element, and calculate the appropriate inventory quantity of other types of products using the minimum actual order quantity of the product of that type. An inventory management method, characterized in that: 3. When a corresponding type of product or another type of product that can be substituted for that type of product is delivered to a plurality of types of orders, the actual order quantity of each type of order and a predetermined amount are determined. based on the conditions, determine the kind and the proper amount of stock to be warehousing product, managing an inventory of a plurality of types of products using the optimum inventory amount obtained in <br/> device using a computer, A storage unit that stores alternative information between products and a calculation unit
The calculation unit reads the substitution information from the storage unit , and for each type of product, one or more of the types are core elements, and the types of other products that can be replaced with the products of the core elements are elements. It reads the actual order quantity of the order corresponding to the product collection means to generate respective nuclear elements and elements contained in <br/> each product set from the database, and means for calculating the optimum inventory quantity for each product set respectively Means for selecting one or a plurality of product sets satisfying the above-mentioned conditions from a plurality of product sets generated for each product type, and determining an appropriate stock amount of core element products included in the selected product set by the product set. properly defined in inventory means, and inventory management apparatus comprising: a hand stage stipulated in zero optimum inventory amount of the other types of products. 4. For a plurality of types of orders, when a corresponding type of product or another type of product that can be substituted for that type of product is dispatched, the results of each type of order for each of a plurality of unit periods Based on the order quantity and predetermined conditions, the type of the product to be received and the appropriate stock amount are obtained, and the inventory of a plurality of types of products is managed using the obtained appropriate stock quantity .
In an apparatus using a computer, a storage unit that stores alternative information between products and a calculation unit
The calculation unit reads the substitution information from the storage unit , and for each type of product, one or more of the types are core elements, and the types of other products that can be replaced with the products of the core elements are elements. means to generate each product set, come to the database
憶to each type of hands stages respectively obtained the minimum actual order quantity from each actual order volume of orders are, means to respectively subtracting the minimum actual order amount corresponding from each actual order volume, nuclei contained in products set using subtraction processed results ordered quantity of the order corresponding to elements and components, a plurality of product sets generated hand stage, by type of products to calculate respectively the proper amount of stock for each product set, satisfying the conditions one or a plurality of means to select a product set to, the proper amount of stock the product of nuclear elements that are included in the product set you select, the minimum actual order quantity according to the product of the proper amount of stock and nuclear elements of the product set hand stage to calculate with, and the proper amount of stock other types of products, inventory control, characterized in that the hand stepped obtain Bei <br/> be calculated using the minimum actual order amount according to the type of product apparatus. 5. A computer for managing inventory of each type of product when a corresponding type of product or another type of product that can be substituted for that type of product is issued for a plurality of types of orders. Based on the actual order quantity and condition of each type of order given in advance, a computer- readable recording medium on which a program for obtaining the type of product to be stored and the appropriate inventory amount is recorded , Replacement between products stored in the storage unit
Means for reading information and generating, for each product type, one or a plurality of product sets each of which is a core element and whose element is another product type which can be substituted for the product of the core element, and a database read out the actual order quantity of the order respectively corresponding to the nuclear elements and elements contained in each product set from
Then, from the means for calculating the appropriate inventory amount of each product set, and a plurality of product sets generated for each product type,
Means for selecting one or a plurality of product sets satisfying the above condition; means for determining the appropriate stock quantity of the core element products included in the selected product set as the appropriate stock quantity of the product set; A machine-readable recording medium on which is recorded a program for functioning as a means for setting an appropriate stock amount of a product to zero. 6. A computer for managing inventory of each type of product when a corresponding type of product or another type of product that can be substituted for that type of product is issued for a plurality of types of orders. , Based on the actual order quantity and conditions of each type of order for each of a plurality of unit periods given in advance,
In a machine-readable recording medium in which a program for obtaining the type of a product to be stored and its proper stock amount is recorded, a computer is used to replace products stored in a storage unit.
Means for reading information and generating, for each product type, one or a plurality of product sets each of which is a core element and whose element is another product type which can be substituted for the product of the core element, and a database Means for respectively obtaining the minimum actual order quantity from each actual order quantity of each type of order stored in the section, means for subtracting the corresponding minimum actual order quantity from each actual order quantity, and Using the actual order quantity obtained by subtracting the orders corresponding to the core elements and the elements, means for calculating the appropriate stock quantity of each product set, and the plurality of product sets generated for each product type, Means for selecting one or a plurality of product sets that satisfies, and the appropriate stock quantity of the core element products included in the selected product set is determined based on the appropriate stock quantity of the product set and the product of the core element. Machine as a means of calculation by using the means for calculating using a small actual order quantity, a proper amount of stock other types of products, the minimum actual order amount according to the type of product
A machine-readable recording medium having recorded thereon a program for enabling the function.