JPH10194412A - Inventory control method by coupling point - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform appropriate inventory control and process instructions on stock items at a CP position by setting the coupling point(CP) for each unit part. SOLUTION: A CP movement control part 11 sets up a process procedure on the upstream side and a process procedure on the downstream side relative to the inventory items positioned at a CP for each unit part, and stores the inventory items in a CP upstream indication master 24 and a CP downstream indication master 25. Also the standard amount of inventory of the inventory items for each unit part is added to standard inventory amount master 27 of overall stock items. In addition, a CP upstream control part 12 instructs to supplement stock based on the standard inventory amount specified in the CP upstream indication master 24 and standard inventory amount master 27. A CP downstream control part 13 allocates the inventory items to orders referring to the CP downstream indication master 25. When the CP of a unit part is moved, a CP movement control part 11 reduces the standard inventory amount of stock items before movement from the standard inventory amount of overall unit parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for integrally managing production, sales, distribution and purchasing operations by using a computer, and more particularly to a method for controlling the required lead time and supply lead time of each product. It relates to an inventory management method using ring points.

[0002]

2. Description of the Related Art In the manufacturing industry, in recent years, in order to simultaneously respond to market needs and improve production efficiency, production modes such as product prospective production, parts preparation production, and order production are appropriately selected according to the circumstances of the company. An integrated operation system of production / sales / distribution / purchase operations for efficiently planning and managing these has been put to practical use. Especially in the current fierce market competition, in order to respond quickly to changes and diversification of market needs, intervening between multi-stage processes from upstream processes to downstream processes close to the delivery of products to customers There is a demand for a method of integrated management of commercial products for more detailed management of a plurality of inventory bases, their supply lead times, and customer requested delivery times (request lead times) of products.

[0003] As described above, for example, Japanese Patent Application Laid-Open No. 7-98741 discloses a method for integrating and managing raw materials to respond to market needs and improve production efficiency. From many inventory sites existing during the process from to the customer (downstream side), one point (coupling point) where the required lead time and supply lead time are balanced for each item is determined, and the logical There is a method of consolidating a large amount of inventory, placing an order on the production side, and instructing the distribution to an actual inventory base. However, according to this conventional technique, although a method of consolidating logical inventory to a coupling point for each single item is considered, a management method in a case where a plurality of different single item coupling points are aggregated in the same item. Was not mentioned.

A conventional material requirement planning method (MRP)
According to, to set and manage whether or not to have the item as inventory for each item, if a certain item is set as an inventory item, the item will be expanded when expanding the required amount of parts using the BOM It became a discontinued product, and it was difficult to set a different coupling point for each product.

[0005] FIG. 29 is a diagram showing the difference in parts to be stocked items for a plurality of single products each having a different required lead time. In the figure, a product X or a part X surrounded by a rectangle indicates a production or purchase process of the item, and an upstream end of the process is an inventory base of the item. FIG. 29A shows that the stock item at the coupling point position of the product A is the part Y, and FIG. 29B shows the stock item at the coupling point position of the product B is the part X and the part P. FIG. 29C shows that the stock items at the coupling point position of the product C are the part Z and the part W. For example, if part X is set as an inventory item,
The required quantity will be discontinued, and inventory control using different coupling points for each product will not be possible.

[0006]

As described above, according to the prior art, it is difficult to set a different coupling point for each product and to manage the inventory of the stock item at the coupling point position. . Furthermore, when the coupling point is moved due to a change in the required lead time, there has been no idea that a computer will give an appropriate process instruction and inventory reservation in accordance with the movement of the coupling point for a single order.

[0007] It is an object of the present invention to set a coupling point for each single item, and to appropriately perform inventory management and process instructions for the inventory items at the coupling point position.

It is another object of the present invention to provide an appropriate inventory management and process instruction in consideration of the inventory items before and after the movement even when the coupling point is moved.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a coupling point upstream instruction master for setting an upstream process procedure with a stock item located at a coupling point as a boundary for each single item and a downstream process procedure are set. The coupling point downstream instruction master is stored in the storage device, and the inventory standard amount of the inventory item for each single item is added to the inventory standard amount of the inventory item for all individual items, and the coupling point upstream instruction master and the entire inventory item are added. An instruction is issued to each process to replenish the inventory based on the inventory reference amount of the inventory point, and the inventory management method using the coupling point is performed to reserve the inventory item for the order with reference to the coupling point downstream instruction master.

Further, according to the present invention, when the coupling point of a single item is moved, the stock reference amount of the moved stock item is added to the stock reference amount of the stock item for all the single items,
The invention is characterized by a stock management method of subtracting the stock reference amount of stock items before movement from the stock reference amounts of all single items.
When the coupling point of a single item moves in the upstream direction, reserve the stock items for the sales order by referring to the instruction master of the downstream of the coupling point before the movement until the actual stock of the stock item before the movement of the coupling point falls below the inventory standard amount. I do.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, terms used in the present embodiment will be defined. The term “single item” used in the present invention refers to an end product or a product provided to a customer. The term “item” refers to a product to be sold, a product, a semi-finished product, a part, a raw material, and the like that appears in a production process, a purchase process, or a delivery process. The required lead time is the maximum number of days for a customer to “purchase the single item if available within that number of days”. In other words, it refers to the number of days during which sales are promoted by the sales representative of the company as a promise to deliver to the customer within a certain number of days for each single item. Production, purchasing or delivery processes are collectively referred to as processes. The process lead time refers to the number of days from when a production, purchase or delivery instruction is issued for the item in the production, purchase or delivery process until the production is completed or the item is delivered. The number of days from issuance of an instruction to deliver a certain item to a designated place until actual delivery is called a supply lead time. The coupling point is defined as the required lead time for each single item among multiple inventory bases intervening between multi-step processes from upstream processes such as purchasing of raw materials and parts to downstream processes near delivery to customers. One point where the supply lead time is balanced.
The coupling point moves upstream or downstream due to market trends, product characteristics, and process improvements. One single product has one coupling point.

FIG. 1 is a configuration diagram of the integrated product for sale and sale management system of the present embodiment. The coupling point movement management unit 11, the coupling point upstream management unit 12, and the coupling point downstream management unit 13 are programs that are stored and executed in the main storage device of the processing device 1. Item master 21, item structure master 22, process procedure master 23,
The coupling point upstream instruction master 24, the coupling point downstream instruction master 25, the inventory calendar 26, the inventory reference amount master 27, the inventory reference amount specification master 28, the allocation table 29, and the masters (31 to 33) for each single item are as follows.
It is a file or a table stored in the main storage device of the processing device 1 or a connected storage device.

The item master 21, the item configuration master 22, and the process procedure master 23 include information on a single item, semi-finished products, parts, materials, etc. constituting the single item, a single item component development table and a process from the most upstream to the single item production process. Set the process procedure. The coupling point upstream instruction master 24 sets, for each single item, a process procedure and the like from the stock item at the coupling point to the most upstream process. The coupling point downstream instruction master 25 sets a process procedure and the like from a single item to a stocked item of the coupling point. The inventory calendar 26 is a table for recording a stocking schedule, a stocking schedule, and a replenishment order amount for each stock item on each day. The stock reference amount master 27 sets the entire stock reference amount for the stock item, and the stock reference amount detail master 28 sets the stock reference amount details for each dependent single item for the stock item. The allocation table 29 sets the quantity and delivery date based on the ordered quantity and the delivery date for the ordered single item and each stock item constituting the single item. The individual item master such as the individual item coupling point master 33 stores a coupling point position candidate, a required lead time, a physical coupling point position determined from the required lead time, and the like for each individual item.

The coupling point movement management unit 11
With reference to the item master 21, the item configuration master 22, and the process procedure master 23, coupling point position candidates are set for each item. Next, the coupling point movement management unit 1
1 determines a physical coupling point position from the required lead time of a single product and a coupling point position candidate, and stores it in the single product-specific coupling point master 33. Next, the coupling point movement management unit 11 creates a coupling point upstream instruction master 24 and a coupling point downstream instruction master 25 based on the items that are in stock at the coupling point position. Next, when the coupling point position of the single item is moved, the coupling point movement management unit 11 creates or updates the inventory calendar 26, the inventory reference amount master 27 and the inventory reference amount specification master 28, and performs coupling as necessary. It issues a stock replenishment instruction issuance request to the point upstream management unit 12.

The coupling point downstream management unit 13
The quantity of the single item ordered with reference to the coupling point downstream instruction master 25 and each stock item developed from this single item and the issue date are registered in the allocation table 29, and the inventory item is allocated with reference to the inventory calendar 26 to allocate. The result is registered in the inventory calendar 26. Further, the allocation result or the alternative is displayed on the display device 2, and an instruction to select an alternative is obtained via the input device 3. As a result, a stock replenishment instruction issuance request is made to the coupling point upstream management unit 12 as necessary.

The coupling point upstream management unit 12
A stock replenishment instruction issuance request is received, a stock replenishment amount is calculated with reference to the inventory calendar 26 and the inventory reference amount master 27, and an inventory replenishment instruction is issued based on the coupling point upstream instruction master 24.

FIG. 2 is a PAD diagram showing a processing procedure of the coupling point movement management unit 11. The coupling point movement management unit 11 determines a physical coupling point position candidate after moving the coupling point for each unit, and sets a physical coupling point position that satisfies the required lead time of the unit set by the user. Then, basic data necessary for the coupling point upstream management unit 12 and the coupling point downstream management unit 13 are automatically generated.

In step 302, the process is repeated to set the coupling points for all the single products. Steps 303 to 308 are executed for a single product for which a coupling point is set for the first time. When the moving process is performed for a single product for which a coupling point has already been set, the process is performed only for a single product for which the coupling point moves. In step 303, a single physical coupling position candidate is set and stored in the single product coupling position candidate master 31. The details of the processing in step 303 will be separately described with reference to a PAD diagram of FIG. 6 which shows a processing procedure for setting physical coupling point position candidates. In the case of a single product in which the coupling point moves, step 303 is skipped if there is no change in the physical coupling point position candidate. In step 305, when the required lead time of a single product is initialized and the required lead time is changed, that is, when the coupling point is moved, the required lead time input from the From the coupling point position candidate master 31 for each unit stored in 303, the most upstream physical coupling point position candidate within the range satisfying the required lead time is selected, and the coupling point master 33 for each unit is selected.
, And specifies an item that is physically in stock from the stock item column of the selected coupling point position candidate, and updates the stock category of the item master 21 to the stock item for the specified item. Note that the details of the processing of step 305 will be separately described with reference to a PAD diagram of FIG. 11 which shows the processing procedure of the physical coupling point position setting. In step 306, a coupling point downstream instruction master 25 for storing a process procedure from a single item to an inventory item at a coupling point is set. Details of the processing of step 306 will be described separately with reference to a PAD diagram of FIG. 13 showing a processing procedure for setting a coupling point downstream instruction master. In step 307, the coupling point upstream instruction master 24 for storing the process procedure from the stock item of the coupling point to the most upstream process is set. The details of the processing of step 307 will be described separately with reference to a PAD diagram of FIG. 15 which shows a processing procedure for setting a coupling point upstream instruction master. Step 3
In step 08, in the case of the processing associated with the movement of the coupling point, it is determined whether the movement of the coupling point is an upstream movement or a downstream movement, and the upstream moving processing and the downstream moving processing are respectively performed. I do. In the case of the process associated with the initial setting of the coupling point, if the inventory calendar 26 does not exist for the inventory item at the coupling point, the inventory calendar 26 is generated and the inventory standard amount of the inventory standard amount master 27 is set. Note that the details of the processing in step 308 will be separately described with reference to a PAD diagram of FIG. 19 showing a processing procedure of coupling point movement.

FIG. 3 shows an item master 21 for a single item A.
FIG. 3 is a diagram showing a data configuration of FIG. The stock category 41 indicates whether the item is a stock item or a non-stock item. In the initial state, all the items are non-stock items. The item at the position of the coupling point is an inventory item. The dependent demand number 42 indicates the number of single items for which the item is an inventory item. Initially 0,
When the stock category 41 is a stock item, the number is one or more.

FIG. 4 is a diagram showing a data structure of the item structure master 22 for the single item A. Item structure master 22
Is a normal parts development table.

FIG. 5 is a diagram showing a data structure of the process procedure master 23 for the single item A. Process procedure master 23
Is a semi-finished product that constitutes a single item A until the single item A is completed,
4 shows a process procedure for parts or materials. The process procedure name indicates that the process related to the item is any of a production process, a purchase process, and a delivery process. Production of item B is process procedure B
01 and B02, but there is no stock between B01 and B02. Process lead time (L /
T) indicates the number of days required to produce, purchase, or deliver the item.

FIG. 6 is a PAD diagram showing in detail the processing procedure for setting a physical coupling point position candidate in step 303 of FIG. In step 401, the process procedure is repeated from the downstream side to the upstream side with reference to the process procedure master 23 for a single item, and the position candidates of the physical coupling points are obtained. Then, the inventory conversion amount is obtained, and the obtained data is stored in the coupling point position candidate master 31 for each unit. At this time, if there is a branch in the process procedure, the process is sequentially performed up to the uppermost stream in each of the branch destination process procedures. In step 402, the position candidate of the physical coupling point is set at the start time of the start process and the end time of the last process of each process procedure with reference to the process procedure code, the next process procedure, and the process lead time of the process procedure master 23. I do. For example, the process procedure A0 which is the final process
In 1, first, a coupling point position candidate CP1 is set at the end time, and then a coupling point position candidate CP2 is set at the start time. For example, when the process procedure of one item is divided into B01 and B02 as in the production of the item B, the physical coupling point is not set during the production of the item as at the end of B01. In step 403, the supply lead time of the position candidate of the physical coupling point obtained in step 402 which is retroactive from the end time of the lowermost step is integrated. For example, the supply lead time of the coupling point position candidate CP1 set at the end point of the process procedure A01 is 0 days, and the coupling point position candidate CP set at the start point is 0 days.
The supply lead time of No. 2 is 5 days, and the supply lead time of the coupling point position candidate CP3 set at the start of the process procedure C01 is 5 days. The position candidates of the physical coupling points are CP1, CP2,.
In step 404, the stock item at each physical coupling point position candidate is determined with reference to the item configuration master 22 and the item master 21. For example, in CP1, the inventory item is A
In CP2, the stock items are B and C. In step 405, the total of the standard costs of the stock items necessary for the position candidates of each physical coupling point is obtained with reference to the standard costs of the item master 21. This is the inventory equivalent.

FIG. 7 is a diagram showing the data structure of the created coupling point position candidate master 31 for each unit. FIG. 8 is a diagram showing the relationship between the process procedure of the item A and the components constituting the item A and the coupling point position candidates.

FIG. 9 shows the required lead time master 3 for each product.
FIG. 4 is a diagram showing a data configuration of No. 2; The required lead time master 32 for each product sets the required lead time for each product. Although the calculation method of the required lead time is not described in detail, the user is required to execute a management strategy such as simulating the inventory turnover rate by converting the inventory conversion amount for each physical coupling point shown in the item master 21. The required lead time can be determined. 9 shows the sales opportunity loss (out-of-stock rate) when the set required lead time is used.

FIG. 10 is a diagram showing the data structure of the coupling point master 33 for each product. The individual item coupling point master 33 sets an item code, a current coupling point position 71, a coupling point downstream instruction master 72 in use, and an order reception stop flag 73 for each individual item. The used coupling point downstream instruction master 72 is set to “current” when using the inventory item of the coupling point position after the initial setting or the movement of the single item, and uses the inventory item of the coupling point position before the movement. Sometimes “before moving” is set. The order reception stop flag 73 is set to 1 when stopping order reception of a single item, and is set to 0 when not stopping.

FIG. 11 is a PAD showing in detail the processing procedure for setting the physical coupling point position in step 305 of FIG. In step 499, the most upstream coupling that satisfies the required lead time from the physical coupling point position candidates obtained by referring to the required lead time of the individual product coupling position candidate master 31 and the required lead time master 32 of the individual product. Identify point position candidates. For example, since the required lead time of the single item A is 6.5 days, the coupling point position candidate satisfying this condition is CP2, and the supply lead time is 5 days. In step 500, it is determined whether this processing is the initial setting or the movement of the coupling point. This is the initial setting if there is no single item coupling point master 33 for the single item. In step 501, when it is determined in step 500 that the coupling point is to be initially set, the single item coupling point master 33 is initialized, and the single item code and the specified coupling point position are set to the current coupling point position 71. Then, the used coupling point downstream instruction master 72 is set to “current”. In step 502, an item to be in stock at the specified coupling point position is acquired from the coupling point position candidate master 31 for each item. In the case of CP2, the items are B and C. In step 503, the following processing is repeated until all the inventory items acquired in step 502 are completed. In step 504, it is determined with reference to the item master 21 whether the stock category 41 of the corresponding item has been treated as a non-stock item. Step 505
In step 504, if the corresponding item is determined to be a non-stock item, the stock category 41 is updated to a stock item. In step 506, the number of dependent demands 42 on the item master 21 of the corresponding item is incremented by one. In step 507, it is determined whether this processing is the initial setting or the movement of the coupling point. This is the initial setting if there is no single item coupling point master 33 for the single item. In step 508, if it is determined in step 507 that the coupling point is to be moved, the number of dependent demands 42 in the item master 21 is decremented by one for the stock item before the movement. In step 509, it is determined whether or not the dependent demand number 42 has become 0 based on the processing result in step 508. Step 510 is a step 509 in which the dependent demand number 4
If 2 is determined to be 0, the stock category 41 of the item master 21 of the stock item before movement is updated to a non-stock item.

FIG. 12 is a diagram showing the data structure of the coupling point downstream instruction master 25. The coupling point downstream instruction master 25 includes a process procedure from a single item to an inventory item at a coupling point, a required amount 55 of each item, a supply lead time 56 of a child process, an instruction date 57 from a delivery date of a dependent item, and usage. The section 58 is stored. The parent item process code 51 sets a parent item or a process procedure code. The child item process code 53 sets a child item or a process procedure code. The parent classification flag 52 is a flag for distinguishing whether the parent item process code 51 is a single item or a production, purchase or delivery process. The child category flag 54 is a flag for distinguishing whether the child item process code 53 is an inventory item or a production, purchase or delivery process. In the use section 58, “current” is set when the coupling point downstream instruction master 25 is after the coupling point is moved, and “before moving” is set when the coupling point downstream instruction master 25 is used before the coupling point is moved. Set. When the coupling point is set in the coupling point position candidate CP2 for the single item A, first, A indicating the item code of the single item in the parent item process code 51 for the dependent item code A is set in the parent classification flag 52. A single item is a child item process code 53, a process procedure code A01 indicating a process of producing the single item A, a child division flag 54 is a production process, a necessary amount 55 is 1; a child process supply lead time 56 is 5; Indication date 5 from the delivery date of the dependent item
A record that is -5 in 7 is generated. Next, records using the child item process code A01 as a parent item process code and the inventory items B and C as child item process codes are similarly generated. The coupling point downstream instruction master 25 is referred to when performing the processing of moving the coupling point in step 308. It is also referred to when the coupling point downstream management unit 13 allocates an inventory item to a single order item.

FIG. 13 is a PAD showing in detail the processing procedure for setting the coupling point downstream instruction master in step 306 in FIG. In step 601, it is determined whether the process is a coupling point initialization or a movement. In step 602, when it is determined in step 601 that the coupling point is to be moved, the coupling point downstream instruction master 25 before the movement is moved.
Is set to “before moving”, and a copy of the coupling point downstream instruction master 25 is stored. The stored coupling point instruction master before movement is used at the time of the processing of moving the coupling point in step 308 of FIG. In step 603, it is determined with reference to the stock category 41 of the item master 21 whether or not the single item itself is the stock item at the coupling point position. In step 604, if it is determined in step 603 that the single item is the coupling point position, the parent item process code 51 of the coupling point downstream instruction master 25 indicates the single item code, the parent classification flag 52 indicates the single item, and the child item process code. Similarly, the item code of the single item is set in 53, and the “stock item” is set in the child classification flag 54. In step 605, the required amount 55 of the coupling point downstream instruction master 25, the supply lead time 56, and the instruction date 57 that is retroactive from the delivery date are set. In the case of a single item, the required amount 55 is 1, the supply lead time 56 of the child process and the designated date 57 from the delivery date of the dependent item are 0.
It is. In step 606, the corresponding single item is
In order to set the coupling point upstream instruction master 24 of 7, it is stored as a coupling point upstream development target item. In step 607, step 603
If the single item is not determined to be the coupling point position, the single item code is set in the parent item process code 51 of the coupling point downstream instruction master 25, the parent classification flag 52 is set to “single item”, and the child item process code 53 is set first in the child item process code 53. The process is set in the process procedure code of the process procedure and the child classification flag 54. In step 608, a required amount 55 of the coupling point downstream instruction master 25, a supply lead time 56, and an instruction date 57 that is retroactive from the delivery date are set. In step 609, referring to the process procedure master 23, the child item process code 5
The process procedure is sequentially repeated from the lowest stream to the upper stream until 3 becomes the most upstream process procedure or inventory item. Step 61
At 0, the process procedure code is moved one stage upstream.
In step 611, the process procedure code of the process corresponding to the parent item process code 51 of the coupling point downstream instruction master 25, the parent classification flag 52 are distinguished between production, purchase or delivery processes, and the process of the upstream process is added to the child item process code by one. Procedure code or inventory item code, production in child classification flag 54,
The purchase or delivery process is distinguished or "stock items" are set.
In step 612, the required amount 55 of the coupling point downstream instruction master 25, the supply lead time 56, and the instruction date 57 that is retroactive from the delivery date are set. In step 613,
As a result of expanding in step 609, child item process code 5
If "inventory item" appears in step 3, select the item in step 3
In order to set the coupling point upstream instruction master at 07, it is stored as a coupling point upstream development target item. For example, according to the example of the coupling point downstream instruction master 25, the items B and C are the upstream development target items.

FIG. 14 is a diagram showing the data structure of the coupling point upstream instruction master 24. The coupling point upstream instruction master 24 calculates, for each single item, the process procedure from the coupling point inventory item to the most upstream process, the required quantity 65 of each item, the supply lead time 66 of the child process, and the delivery date of the dependent item. Is stored. The parent item process code 61 and the child item process code 63 are the same as the parent item process code 51 and the child item process code 53, respectively. Parent classification flag 62
Is a flag for distinguishing whether the parent item process code 61 is a single item or an inventory item or a production, purchase or delivery process. The child category flag 64 is a flag for distinguishing whether the child item process code 63 is an inventory item or a production, purchase or delivery process. The contents and meaning of the use section 68 are the same as those of the use section 58. The coupling point upstream instruction master 24 is referred to when performing the processing of moving the coupling point in step 308. Coupling point upstream management unit 1
2 is referred to when a stock replenishment instruction is issued to each process up to the most upstream process in order to restock the stock at the coupling point.

FIG. 15 is a PAD showing in detail the processing procedure for setting the coupling point upstream instruction master in step 307 of FIG. In step 701, it is determined whether the process is a coupling point initial setting or a movement. In step 702, when it is determined in step 701 that the coupling point is to be moved, the coupling point upstream instruction master 24 before the movement is moved.
A copy of the coupling point upstream instruction master 24 in which the use section 68 of “No. The stored coupling point instruction master before movement is used at the time of the processing of moving the coupling point in step 308 in FIG. In step 703, the process is repeated until all the inventory items designated as the coupling point upstream development items in step 306 are completed. Step 70
At 4, it is determined whether the stock item specified as the coupling point upstream development item has already been developed in the processing of setting the coupling point of another single item. Step 70
In step 5, if it is determined in step 704 that the upstream development of the corresponding item has not been completed, first, the parent item process code 61 of the coupling point upstream instruction master 24 stores the item code of the stock item, the parent classification flag 62 as the stock item, A process procedure code of the first process procedure is set in the item process code 63, and a distinction between the production, purchase, and delivery processes is set in the subdivision flag 64. In step 706, a required quantity 65, a supply lead time 66, and a designated date 67 that is retroactive from the delivery date are set for the item in the coupling point upstream instruction master 24.
In step 707, the process procedure is repeated from the lowest stream to the upper stream sequentially until the child item process code 63 becomes the most upstream process procedure or the stock item with reference to the process procedure master 23.
In step 708, the process procedure is moved one stage upstream. In step 709, the process procedure code of the process corresponding to the parent item process code 61 of the coupling point upstream instruction master 24, the parent classification flag 62 is distinguished between the production, purchase or delivery process, and the upstream process is one for the child item process code 63. Of the production, purchase or delivery process or "stock item" is set in the process procedure code or the item code of the stock item and the child classification flag 64. In step 710, a required quantity 65, a supply lead time 66, and a designated date 67 that is retroactive to the delivery date are set for the item in the coupling point upstream instruction master 24. In Step 711, Step 7
As a result of the development in step 07, if an in-stock item appears in the child item process code 63, the item is additionally stored as a coupling point upstream development target item so that the corresponding item is again set as the target for setting the coupling point upstream instruction master. If the item K as a child item is designated as a regular item (a type of stock item), the item K is added as a coupling point upstream development target item. FIG. 16 shows the item B in this case.
FIG. 7 is a diagram showing a parent-child relationship of a downstream instruction master of a coupling point of item C and an item C;

FIG. 17 is a diagram showing the data structure of the stock reference amount master 27 and the stock reference amount detail master 28. One record of the stock reference amount master 27 has a total of the stock reference amounts for all single items for each stock item. One record of the stock reference amount specification master 28 sets a stock reference amount for each set of a stock item and its dependent single item. The initial value of the stock reference amount is 0.

FIG. 18 is a diagram showing the data structure of the inventory calendar 26. The inventory calendar 26 is a table that unifiedly shows data of the entry / exit plan and the confirmed order for the items for which inventory entry / exit management is performed. One record of the inventory calendar 26 corresponding to each item includes an item code, a calendar code, a starting stock amount, a stocked amount, a stocked amount, a replenishment order amount, and the like. The item code is the item code of the stock item. The calendar code indicates a date (for example, August 19, 1996). From the starting stock amount to the replenishment order amount, it has a plan base and a fixed base (orders and quantities based on unofficial announcements). The starting stock amount is the stock amount on the morning of the day indicated by the calendar code. The storage amount is a planned storage amount and a confirmed storage amount by replenishment arrangement. The outgoing amount is a scheduled outgoing amount and a confirmed outgoing amount by supply. The replenishment arrangement amount is the amount to be replenished on that day. According to the inventory calendar 26 shown in FIG.
It indicates that the storage amount will be the day. When the same item is stored in a plurality of warehouses attached to different factories, each warehouse has one file of data. Further, FIG. 18 shows a small-schedule table on a daily basis. However, a medium-schedule table on a weekly basis, a large-schedule table on a monthly basis, and the like may be added.

FIG. 19 is a PAD diagram showing in detail the processing procedure for moving the coupling point in step 308 of FIG. In step 801, the process is repeated for all items that become inventory items by setting or moving a coupling point of a single item. In step 802, as a result of the setting or movement of the coupling point, the stock reference amount of the item that has become a physical inventory item is changed to the demand forecast amount of the single item to which the inventory item depends, the order cycle and the order lot input by the user. The inventory is calculated based on the size, inventory replenishment planning method, and the like, and the calculated inventory reference amount is stored in the inventory reference amount specification master 28 for each subordinate item for the corresponding item. Known techniques can be applied to the calculation method of the stock reference amount, and a detailed description thereof will be omitted. In step 803, it is determined whether this processing is the initial setting or the movement of the coupling point. In step 804, when it is determined in step 803 that this processing is accompanied by the movement of the coupling point, it is determined whether or not the processing is to move the coupling point upstream. The physical coupling point position can be known by referring to the individual item coupling point position candidate master 31 for the child item for which the child classification flag 54 of the coupling point downstream instruction master 25 is “stock item”. The coupling point position is compared with the physical coupling point position obtained in step 305, and if the latter is larger, the coupling point is moved upstream. In step 805, when it is determined in step 804 that the process is to move upstream of the coupling point, a process of moving to the upstream of the coupling point is performed. Note that the details of the processing in step 805 will be separately described with reference to a PAD diagram of FIG. 20 showing a processing procedure for moving to the upstream of the coupling point. In step 806, if it is determined in step 804 that the process is to move to the downstream of the coupling point, a process of moving to the downstream of the coupling point is performed. Step 80
The details of the processing of No. 6 will be separately described with reference to a PAD diagram showing a processing procedure of the movement to the downstream of the coupling point in FIG. In step 807, the process is repeated for all the items that become inventory items by setting or moving the coupling point of the single item. In step 808, it is determined with reference to the inventory calendar 26 whether an inventory calendar already exists for the inventory item at the coupling point. Step 80
In step 9, if it is determined in step 808 that the inventory item does not exist in the coupling point inventory item, the inventory calendar 26 is generated. Here, for an item to be an inventory item, records for a predetermined number of days are added to the inventory calendar 26, and an item code and a calendar code of each record are set. In step 810, the stock reference amount of the stock item is added to the stock reference amount of the same item in the stock reference amount master 27. In step 811, a request for issuing a stock replenishment process instruction to the coupling point upstream management unit 12 is issued to the coupling point upstream management unit 12 together with the item code of the stock item so as to issue a process instruction for stock replenishment of the stock item at the coupling point.

FIGS. 20a and 20b are PAD diagrams showing in detail the processing procedure for moving the coupling point upstream in step 805 in FIG. In step 901 of FIG. 20A, the use category 58 is repeated with respect to all the items that become the inventory items at the coupling point after the movement by referring to the child category flag 54 of the coupling point downstream instruction master 25 of “current”. In step 902,
With reference to the inventory calendar 26, it is determined whether or not an inventory calendar exists for an item to be an inventory item at the coupling point after the movement. In step 903, the stock calendar 26 is added to the stock item at the coupling point in step 902.
Is determined to not exist, the inventory calendar 26 is generated. The processing is the same as the processing in step 809. In step 904, the stock reference amount of the stock item is added to the stock reference amount of the same item in the stock reference amount master 27. In step 905, the use section 58 refers to the child section flag 54 of the coupling point downstream instruction master 25 whose coupling point is “before moving”, and repeats for all the items which are the stock items of the coupling point before moving. In step 906,
If there is an in-process inventory replenishment process instruction for the stock item at the coupling point before the movement, it is determined whether or not to change the instruction to deliver this to the stock item at the coupling point after the movement. This is a condition under which it is possible to select whether or not to change the instruction for each system, and it is assumed that which is to be selected in advance is set in the storage device. In step 907, when it is determined in step 906 that the instruction is changed to be delivered to the stocked item of the moved coupling point, the moved cup is referred to by referring to the filed production instruction and work instruction. An instruction that is in process in the upstream process from the ring point is extracted, and this is changed to a delivery instruction to the coupling point after the movement. In step 908, the planned incoming and outgoing amounts are moved from the stock calendar 26 of the stock item at the coupling point before the movement to the stock calendar 26 of the stock item at the coupling point after the movement. Step 909
With reference to the stock base amount specification master 28, the record storing the stock base amount of the coupling point before moving is deleted, and the stock base amount of the deleted stock base amount of the stock item in the stock base amount master 27 is deleted. Subtract the amount. In step 910, the coupling point upstream instruction master 24 before the movement is deleted. In step 912, the process is repeated until all the stock items at the coupling point after the movement are completed. In step 913, a request for issuing a stock replenishment process instruction to the coupling point upstream management unit 12 is issued to the coupling point upstream management unit 12 together with the item code of the stock item to issue a process instruction for stock replenishment of the stock item at the coupling point after moving. In step 914, the coupling point position 71 of the single item-specific coupling point master 33 and the used coupling point downstream instruction master 72 are updated. That is, the coupling point position 71 is updated from the pre-movement coupling point to the post-movement coupling point. Further, the used coupling point downstream instruction master 72 is changed from “current” to “before moving”.

FIG. 21 is a diagram showing examples of the instruction sheet before and after the change. FIG. 21A shows an example of a production instruction sheet.
FIG. 21B is an example of the work instruction sheet. When the inventory item C at the coupling point before the movement is changed to the inventory items G and H at the coupling point after the movement, the production instruction for the item C in progress is canceled and the production instruction for the items G and H is newly established. Further, the work instruction of the item C is canceled, and the production numbers of the work instructions of the items G and H are updated.

FIG. 22 is a diagram for explaining an example of changing the instruction of the process in progress and changing the inventory calendar 26 by moving the coupling point. For example, when the coupling point moves from CP2 to CP3 in the example of the coupling point position candidate master 31 for each item in FIG. 7, the process instruction distribution of the stock replenishment for the item C does not change the in-process process instruction for the item C. And an instruction to change the delivery destination of the items G and H. Inventory calendar 26
In the storage schedule of the inventory calendar 26 of the item C before the movement of the coupling point, the process instruction that is scheduled to be received after the unchanged portion of the in-process process instruction is the item G after the movement of the coupling point. And the inventory calendar 26 of the item H moves.
Also, of the outgoing schedules of the item C, the outgoing scheduled X based on the unchanged portion of the in-process process instruction is left, and the subsequent outgoing scheduled Y is moved as the outgoing scheduled of the items G and H. Also, for the inventory calendars 26 of the items G and H, the upstream of the coupling point is arranged so as to arrange the restocking of the scheduled delivery Y based on the movement of the scheduled delivery performed in step 908 and the stock reference amount calculated in step 802. Request to the management unit 12.

FIG. 20B is a diagram showing a procedure (continuation) of the moving process to the upstream of the coupling point, and includes a monitoring process performed every day. In step 915, the following processing is repeated for all the single items. In step 916, the process is repeated until all the processing of the stock items for which the used coupling point downstream instruction master 72 of the single item-specific coupling point master 33 is “before moving” is completed. Step 917
With reference to the stock calendar 26 of the stock item at the coupling point before movement, it is determined whether or not the starting stock amount on the processing day is less than the stock reference amount of the stock item in the stock reference amount master 27. In step 918, if the amount is less than the stock reference amount, the used coupling point downstream instruction master 72 of the single item coupling point master 33 is updated to "current". In step 919, the stored coupling point downstream instruction master 25 before the movement of the product is deleted. In step 920, the process is repeated for all the items that are the stock items of the coupling point before the movement with reference to the single item coupling point position candidate master 31. In step 921, it is determined whether another item is using the inventory calendar 26 for the inventory item at the coupling point before movement. If the dependent demand number 42 of the stock item is not 0 with reference to the item master 21, another item uses the stock calendar 26. Step 92
In step 2, if it is determined in step 921 that the inventory calendar 26 for the inventory item at the coupling point before movement is not used by another item, the outgoing amount schedule of the inventory calendar 26 for the corresponding item is moved to the coupling point after movement. Move to the scheduled outgoing quantity of the inventory item of
Remove.

FIGS. 23A and 23B are PAD diagrams showing in detail the processing procedure of the movement to the downstream of the coupling point in step 806 of FIG. Step 1 of FIG.
In step 001, the process is repeated for all items that become stock items at the coupling point after the transfer. Step 1002
Then, it is determined with reference to the inventory calendar 26 whether or not the inventory calendar 26 exists in the item to be the inventory item at the coupling point after the movement. In step 1003, when it is determined in step 1002 that the stock item at the coupling point does not have the stock calendar, the stock calendar 26 is generated. The processing is the same as the processing in step 809. In step 1004, the stock reference amount of the stock item is added to the stock reference amount of the same item in the stock reference amount master 27. In step 1005, the process is repeated with respect to all the items which are the stock items of the coupling point before the movement with reference to the child section flag 54 of the stored coupling point downstream instruction master 25. In step 1006,
With reference to the inventory reference amount detail master 28, the record storing the inventory reference amount of the coupling point before movement is deleted,
The stock reference amount of the deleted item is subtracted from the total stock reference amount of the stock item in the stock reference amount master 27. Step 10
At 07, the stored coupling point upstream instruction master 24 is deleted. In step 1008, the coupling point position 71 of the coupling point master 33 for each product is updated. That is, the coupling point position 71 is updated from the pre-movement coupling point to the post-movement coupling point. In step 1009,
After moving, repeat until all the stock items at the coupling point are completed. In step 1010, a stock replenishment process instruction issuance request is issued to the coupling point upstream management unit 12 for the stock item at the post-move coupling point with reference to the pre-move coupling point downstream instruction master 25. In step 1011, a request for issuing a stock replenishment process instruction to the coupling point upstream management unit 12 is issued to the coupling point upstream management unit 12 for the stock item at the post-move coupling point with reference to the post-move coupling point upstream instruction master 24. In step 1012, the stored coupling point downstream instruction master 25 is deleted. In step 1013, it is determined whether or not the supply capacity per unit period of the stock item after the movement exceeds the demand amount per unit period of the stock item. The supply capacity of the stock item refers to the supply capacity of the item master 21. The demand amount of the inventory item is obtained by (demand amount during predetermined period of all single items to which the inventory item depends) × required amount of inventory item / (predetermined period / unit period). Step 10
In step 14, the order reception stop flag 73 of the individual item coupling point master 33 is set to 1 in order to temporarily stop accepting orders for the corresponding single item until a sufficient inventory amount is secured at the coupling point after the movement. . This is because the demand between the coupling point before the move and the coupling point after the move temporarily overlaps the demand corresponding to the order and the stock replenishment instruction to the post-move coupling point. This is because the order reference is stopped and the stock is replenished because the stock reference amount of the coupling point cannot be reached after the physical movement.

FIG. 24 is a view for explaining an example in which the instruction of the process in process is changed and the inventory calendar 26 is changed by moving the coupling point. For example, when the coupling point moves from CP3 to CP2 in the example of the coupling point position candidate master 31 for each item in FIG. 7, the actual inventory of the stock items G and H at the coupling point before the movement and the remaining arrangement of the delivery schedule are calculated. Thus, an inventory replenishment process instruction is issued to the process up to the inventory item C at the coupling point after the movement. As a result, during the supply lead time from CP3 to CP2, the in-process process instruction distribution by order is set for the stocking schedule of the inventory calendar 26 of the inventory item C. Further, in the delivery schedule of the inventory calendar 26 of the inventory item C in this period, the remaining order of the item C due to the order of the single item A is set, but the actual inventory of the item C in this period is 0. After this period, of the inventory schedules of the inventory items 26 of the inventory items G and H, the process hand distribution up to the item C which is the inventory item of the coupling point before the movement is moved to the arrival schedule of the inventory calendar 26 of the inventory item C. Then, the inventory of the item C is accumulated. Further, the item C for the most upstream process is set so that the ending stock of the stock item C reaches the stock reference amount.
The inventory replenishment process instruction arrangement up to this point is set as the stocking schedule of the inventory item C. Note that the order reserve for inventory item C after the coupling point transfer is determined is from CP3 to CP2.
Until after the supply lead time.

FIG. 23B is a diagram showing a procedure (continuation) of the moving process to the downstream of the coupling point, and includes a monitoring process performed every day. In step 1016, the following processing is repeated for all the single items. In step 1017,
The use of the coupling point master 33 for each unit is repeated until the processing of the stock items whose coupling point downstream instruction master 72 is “current” is completed. Step 1
In 018, the stock calendar 26 of the stock item at the coupling point after the movement is referred to, and it is determined whether or not the starting stock amount on that day is equal to or larger than the stock reference amount of the stock item in the stock reference amount master 27. In step 1019, it is determined whether or not the order reception stop flag 73 of the coupling point master 33 for each unit is in the stopped state (1) when the stock reference amount is equal to or more than the reference amount. In step 1020, when the system is in the stop state, the order reception stop flag 73 is updated to the released state (0). In step 1021, the process is repeated for all the items which are the stock items of the coupling point before the movement with reference to the single item-specific coupling point position candidate master 31. In step 1022, it is determined whether another item uses the inventory calendar 26 for the inventory item at the coupling point before movement. If the dependent demand number 42 of the stock item is not 0 with reference to the item master 21, another item uses the stock calendar. In step 1023, when it is determined in step 1022 that the inventory calendar 26 for the inventory item at the coupling point before movement is not used by another item, the outgoing amount schedule of the inventory calendar 26 of the corresponding item is moved and then coupled. The system moves to the point delivery schedule and deletes the inventory calendar 26.

FIG. 25 is a diagram showing the data structure of the allocation table 29. The allocation table 29 stores the order number,
Store order item code, reserved item code, reserved quantity, and reserved delivery date. Regarding the number of vehicles and the delivery date, it is desirable to provide an area for storing some alternatives.

FIG. 26 is a PAD diagram showing the processing procedure of the coupling point downstream management unit 13. This process is executed for each single order. In step 1202, the order number, the item code of the single item, the number of ordered items, and the delivery date are obtained from an order information file or the like (not shown), the inventory items to be allocated to the single item are obtained from the coupling point downstream instruction master 25, and each inventory item is obtained. The item is stored in the allocation table 29. The number of inventory items is (the number of single items × the required amount of inventory items 55). The delivery date is the date obtained by adding the designated date 57 from the delivery date of the dependent item to the delivery date of the single item. The coupling point downstream instruction master 25 referred to here is:
In accordance with the coupling point downstream instruction master 72 used by the single product individual coupling point master 33, the current or previous coupling point downstream instruction master 2 according to the use of the coupling point downstream instruction master 72
5 In step 1203, the processing is repeated until the processing for all the inventory items stored in the allocation table 29 is completed. In step 1204, the available stock amount (starting stock amount + incoming stock amount-outgoing stock amount) is acquired with reference to the stock calendar 26 of the stock item. Step 12
In step 05, the requested delivery amount (number) is compared with the available stock amount, and it is determined whether the available stock amount is equal to or larger than the requested delivery amount. In step 1206, when the available stock amount does not reach the requested delivery amount, the available stock amount on the scheduled delivery date is calculated. In step 1207, the scheduled delivery date is moved back and forth to search for a date on which the available stock becomes equal to or greater than the requested delivery volume. In step 1208, step 120
6 and 1207 are stored in the allocation table 29, and the number of other inventory items and single items and the alternatives of the delivery date are stored in the allocation table 29. In step 1209, the created allocation table 29 is displayed on the display device 2. When an instruction to approve the allocation result or select one of the alternatives is input via the input device 3, go to step 1210, where the order number stored in the allocation table 29 and the single item are allocated. Repeat until all inventory items have been processed. In step 1211, the inventory calendar 26 of the inventory item is updated. That is, the allocated quantity is added to the allocated outgoing sunrise storage quantity, and the subsequent start stock quantity is updated accordingly. In step 1212, the inventory calendar 26
Is updated or not, it is determined whether or not inventory replenishment is necessary, and if necessary, a request is issued to the coupling point upstream management unit 12 to issue an inventory replenishment process instruction. By comparing the available stock amount on the delivery day with the stock reference amount of the stock item in the stock reference amount master 27, it is determined whether or not stock replenishment is necessary.

The coupling point downstream management unit 13
Refers to the determined allocation table 29 and, if there is a reserved inventory scheduled to be dispatched on that day, instructs the warehouse to issue the corresponding stock item.

FIG. 27 is a PAD showing a processing procedure of the coupling point upstream management unit 12. Step 180
In 1, the process is repeated for all the items for which the received request for issuing the stock replenishment process instruction has been issued. In step 1802, the inventory calendar 26 of the corresponding item and the inventory reference amount master 2
7 is referred to the stock reference amount. In step 1803,
Calculate the inventory replenishment amount. The stock replenishment amount can be calculated by a general order point management method or a required amount planning method. In step 1804, the stock replenishment instruction is issued with reference to the coupling point upstream instruction master 24 whose use category 68 is "current". For example, according to the example of FIG. 14, five work instructions such as a production instruction or a purchase instruction are issued for the inventory item B, and six work instructions are issued for the inventory item C. The quantity is the required quantity of each item ×
It is calculated based on the stock replenishment amount. The delivery date of each item is a date obtained by adding the designated date 67 from the delivery date of the dependent item to the stocking date of the stock item.

FIG. 28 is a diagram showing differences in parts to be stocked items for a plurality of single products each having a different required lead time. In the figure, a product X or a part X surrounded by a rectangle indicates a production or purchase process of the item. The circled X indicates inventory items. The process configuration on the left side with respect to the inventory item corresponds to the process configuration of the coupling point downstream instruction master 25, and the process configuration on the right side corresponds to the coupling configuration of the coupling point upstream instruction master 24.
FIG. 28A shows that the stock item viewed from the product A is only the part Y at the coupling point position. A stocking schedule based on the product A is entered in the stock calendar 26 of the part Y. FIG. 28B shows that the stock item viewed from the product B is only the part X at the coupling point position. A stocking schedule based on the product B is entered in the stock calendar 26 of the part X. FIG. 28C shows that the stock items viewed from the product C are the parts Z and W at the coupling point position. In this way, by setting the instruction master indicating the parent-child relationship between the item and the process for each single item, it is possible to perform inventory management for stock items at different coupling points for each single item. According to the example of FIG. 28, for example, the part Y is a common part of the products A, B, and C.
Instructions such as production instructions and work instructions based on the products A, B and C are issued for the process of producing or purchasing the part Y.

The present invention can be applied not only to the manufacturing industry but also to the distribution industry whose process includes purchasing and delivery.

[0048]

As described above, according to the present invention, a coupling point upstream instruction master and a coupling point downstream instruction master are provided with a stock item located at a coupling point for each product as a boundary. , Inventory management can be performed finely and dynamically according to the production form and market needs, and it is possible to simultaneously respond to market needs and improve production efficiency.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a merchandise integrated management system according to an embodiment.

FIG. 2 is a diagram illustrating a coupling point movement management unit 1 according to the embodiment;
FIG. 3 is a diagram showing an outline of a processing procedure of No. 1;

FIG. 3 is a diagram showing a data configuration of an item master 21 of the embodiment.

FIG. 4 is a diagram illustrating a data configuration of an item configuration master 22 according to the embodiment.

FIG. 5 is a diagram showing a data configuration of a process procedure master 23 of the embodiment.

FIG. 6 is a PAD diagram illustrating a processing procedure for setting a physical coupling point position candidate according to the embodiment;

FIG. 7 is a diagram illustrating a data configuration of a coupling point position candidate master 31 for each unit according to the embodiment.

FIG. 8 is a diagram showing a relationship between a process procedure of each part constituting a single component of the embodiment and a coupling point position candidate.

FIG. 9 is a lead time master 32 for individual products according to the embodiment.
FIG. 3 is a diagram showing a data configuration of FIG.

FIG. 10 is a diagram illustrating a data configuration of a coupling point master 33 for each product according to the embodiment.

FIG. 11 is a PAD illustrating a processing procedure for setting a physical coupling point position according to the embodiment;

FIG. 12 is a diagram illustrating a data configuration of a coupling point downstream instruction master 25 according to the embodiment.

FIG. 13 is a PAD diagram showing a processing procedure for setting a coupling point downstream instruction master 25 according to the embodiment.

FIG. 14 is a diagram showing a data configuration of a coupling point upstream instruction master 24 of the embodiment.

FIG. 15 is a PAD illustrating a processing procedure for setting a coupling point upstream instruction master 24 according to the embodiment.

FIG. 16 is a diagram illustrating a parent-child relationship of a downstream instruction master of a coupling point of an item B and an item C according to the embodiment.

FIG. 17 is a diagram showing a data configuration of a stock reference amount master 27 and a stock reference amount specification master 28 of the embodiment.

FIG. 18 is a diagram showing a data configuration of an inventory calendar 26 of the embodiment.

FIG. 19 is a PAD illustrating a processing procedure of coupling point movement according to the embodiment.

FIG. 20A is a PAD illustrating a processing procedure for moving to the upstream of the coupling point according to the embodiment;

FIG. 20B is a PAD (continued) illustrating a processing procedure for moving the coupling point upstream according to the embodiment;

FIG. 21 is a diagram illustrating an example of an instruction sheet before and after a change in the embodiment.

FIG. 22 is a diagram illustrating an example in which a process instruction change and a stock calendar are changed during processing by moving a coupling point according to the embodiment.

FIG. 23A is a PAD diagram showing a processing procedure for moving to the downstream of the coupling point according to the embodiment;

FIG. 23B is a PAD (continued) illustrating a processing procedure for moving to the downstream of the coupling point according to the embodiment;

FIG. 24 is a diagram illustrating an example in which a process instruction is changed during a process and a stock calendar is changed by moving a coupling point according to the embodiment.

FIG. 25 is a diagram showing a data configuration of an allocation table 29 according to the embodiment.

FIG. 26 is a PAD illustrating a processing procedure of the coupling point downstream management unit 13 according to the embodiment.

FIG. 27 is a PAD illustrating a processing procedure of the coupling point upstream management unit 12 according to the embodiment.

FIG. 28 is a diagram illustrating a difference in parts to be in stock items for a plurality of single products having different required lead times according to the embodiment.

FIG. 29 is a diagram showing differences in parts to be stocked items for a plurality of conventional single products having different required lead times.

[Explanation of symbols]

11: coupling point movement management unit, 12: coupling point upstream management unit, 13: coupling point downstream management unit, 24: coupling point upstream instruction master, 25: coupling point downstream instruction master, 2
6: Inventory calendar, 27: Inventory reference amount master, 29: Allocation table, 33: Coupling point master for each item

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahiro Katayanagi 2-2-2 Kagahara, Tsuzuki-ku, Yokohama-shi, Kanagawa Prefecture Inside the Hitachi, Ltd. Business System Development Center (72) Inventor Michito Taira 890 Kashimada, Saiwai-ku, Kawasaki-shi, Kanagawa Address Co., Ltd. Information Systems Division, Hitachi, Ltd.

Claims (3)

[Claims] In a multi-stage process from an upstream process to a downstream process close to delivery to a customer, a coupling in which a required lead time and a supply lead time of a single item among a plurality of inventory bases interposed between processes are balanced. In a computer-based inventory management method that obtains points and consolidates inventory items at coupling points to perform inventory management of the inventory items, an upstream process procedure with the inventory item located at the coupling point as a boundary for each single item Is stored in the storage device, and the reference amount of the stock item for each single item is stored in the storage device. It is added to the stock reference amount of the item, and based on the coupling point upstream instruction master and the total stock reference amount of the stock item. An inventory management method based on a coupling point, wherein an instruction is issued to each step to perform inventory replenishment, and an inventory item is allocated to an order with reference to the coupling point downstream instruction master. 2. When the coupling point of a single item is moved, the stock reference amount of the stock item after the movement is added to the stock reference amount of the stock item for all the single items, and the stock reference amount of the stock item before the movement is added. 2. The inventory management method using coupling points according to claim 1, wherein is subtracted from the inventory reference amount for all single items. 3. When the coupling point of a single item moves in the upstream direction, the coupling point downstream instruction master before the movement is referred to until the actual stock of the stock item before the movement of the coupling point falls below the reference inventory amount. 3. The inventory management method using a coupling point according to claim 2, wherein allocation of inventory items to the order is performed.