JP2007094717A - Inventory management system, inventory management method and inventory management program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inventory management system, an inventory management method and an inventory management program that can integrate inventory management of products having different management cycles and can efficiently draft a production plan. <P>SOLUTION: A management computer 21 acquires a sales plan from a sales plan data storage part 23 and executes day division processing of a sales plan number. The management computer 21 calculates the daily production number, and records it into a production plan data storage part 24. Next, at the beginning of a week, the management computer 21 specifies a weekly management target from a management form data storage part 22 and specifies the production plan of a processing target in the production plan data storage part 24. Next, the management computer 21 acquires the present stock amount from an inventory management data storage part 25 and corrects the production number, such that proper stock recorded in a proper stock data storage part 26 can be maintained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inventory management system, an inventory management method, and an inventory management program for products having different management cycles.

  In the management of a company, especially in the production management of the manufacturing industry, supply chain management has become important in order to improve production efficiency. It is important to grasp the status of each process in order to perform supply chain management accurately. For example, if the inventory is increased, products can be provided quickly, but the burden on storage, defective inventory costs, etc. increases. On the other hand, if inventory is reduced, storage costs and the like can be reduced, but there is a possibility that the opportunity for product sales will be missed. That is, by accurately grasping the status of each process, the number of stocks can be reduced and the number of sales can be increased. Therefore, a technique relating to lead time management for performing more appropriate supply chain management is disclosed (see Patent Document 1). In the technology described in this document, lead time management is performed using a management computer connected via a network to a plurality of systems that manage each process constituting a supply chain in association with a product identifier that individually identifies a product. To do. Here, the management computer extracts the product identifier of the product based on the information related to the product for which the lead time is acquired. Next, data relating to the lead time associated with the extracted product identifier is extracted from a plurality of system groups. Then, the lead time for each process is output based on the comparison with a predetermined reference value.

  In the above management, it is important to share information between the sales organization (sales company) and the production organization (production district) and maintain close cooperation. However, each product and each sales company has its own situation. For example, monthly management may be performed because the change is moderate for small-quantity, multi-product products. In this monthly management, production can be performed in the production zone and provided to the sales company according to the number of requests from the sales company. Such a small number of products of a wide variety have a large number of models, so when viewed in terms of the number of models, they occupy the majority.

  On the other hand, from the viewpoint of the ratio of shipping amount, mass-produced products account for a larger proportion. Such products are subject to weekly management due to large changes in sales conditions. In this weekly management, it is possible to manage the inventory quantity by producing and replenishing the shortage quantity so that the appropriate inventory quantity can be maintained.

Further, these management forms do not depend only on the model. For example, even with the same model, the sales company performs weekly management or monthly management.
JP 2004-326481 A (first page)

  Thus, even if there are two types of management cycles, weekly management and monthly management, the application of the management cycle may differ depending on the model or sales company. On the other hand, the production area needs to produce a quantity that is the sum of the number of products managed monthly and the number of products managed weekly. In such a case, when different management forms are mixed, the production planning becomes complicated.

It is also possible to perform weekly management for all products, but in this case, weekly management is performed even for products that can be handled by monthly management, which unnecessarily increases the management load.
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to integrate an inventory management of products having different management cycles and efficiently create a production plan, an inventory It is to provide a management method and an inventory management program.

  In order to solve the above problems, the invention according to claim 1 is a management form in which data for specifying a management cycle applied for each sale is recorded in a management cycle consisting of a short-term cycle or a long-term cycle. Data storage means; sales plan data storage means for recording sales plan data for each sale; inventory management data storage means for recording data relating to the current inventory quantity sequentially for each sale; and data relating to appropriate inventory quantity An inventory management system comprising an appropriate inventory data storage means and a management computer for calculating a production plan, wherein the management computer stores the sales plan data recorded in the sales plan data storage means according to the long-term cycle. Based on the above, the daily inventory quantity is calculated for each sale, the difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity is calculated. A production plan generating means for subtracting the difference from the quantity to calculate a daily production quantity; a sale to which the short-term cycle is applied; and a current inventory quantity recorded in the inventory management data storage means by the short-term cycle And calculating a difference obtained by subtracting the appropriate stock quantity from the current stock quantity, and functioning as a production plan correcting means for executing a correction process for subtracting the difference from the daily production quantity of the sales.

  The invention according to claim 2 is the inventory management system according to claim 1, wherein the information for specifying the sale includes a model specifying identifier for specifying a model to be sold, and the management computer The gist is to further function as a means for totaling the daily inventory quantity for each model identification identifier.

  According to a third aspect of the present invention, in the inventory management system according to the first or second aspect, the inventory management system records distribution data for distributing distribution plan total amount corresponding to a planned date. And the management computer calculates the daily inventory quantity by applying the distribution data recorded in the distribution data storage means to the total quantity included in the sales plan data for each sale. .

  The invention according to claim 4 is a management form data storage means for recording data for specifying a management cycle applied for each sale in a management cycle consisting of a short-term cycle or a long-term cycle; Sales plan data storage means for recording sales plan data, inventory management data storage means for recording data relating to the current inventory quantity sequentially for each sale, appropriate inventory data storage means for recording data relating to the appropriate inventory quantity, and production A method for managing inventory using an inventory management system comprising a management computer for calculating a plan, wherein the management computer stores the sales plan data recorded in the sales plan data storage means in the long-term cycle. Based on the daily inventory amount for each sale, the difference obtained by subtracting the appropriate inventory amount from the current inventory amount, The production plan generation stage for calculating the daily production amount by subtracting the difference from the warehouse amount, and the sales to which the short-term cycle is applied are identified, and the current inventory recorded in the inventory management data storage means by the short-term cycle And a production plan correction stage for performing a correction process of obtaining a quantity, calculating a difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity, and subtracting the difference from the daily production quantity of the sale. To do.

The invention according to claim 5 is a management form data storage means for recording data for specifying a management cycle applied to each sale in a management cycle consisting of a short-term cycle or a long-term cycle; Sales plan data storage means for recording sales plan data, inventory management data storage means for recording data relating to the current inventory quantity sequentially for each sale, appropriate inventory data storage means for recording data relating to the appropriate inventory quantity, and production A program for managing inventory using an inventory management system having a management computer for calculating a plan, wherein the management computer is stored in the sales plan data stored in the sales plan data storage means according to the long-term cycle. Based on the daily inventory amount for each sale, the difference between the current inventory amount and the appropriate inventory amount is calculated. Production plan generation means for calculating the daily production quantity by subtracting the difference from the daily inventory quantity, and sales to which the short-term cycle is applied are identified and recorded in the inventory management data storage means by the short-term cycle The gist is to obtain the current inventory quantity, calculate a difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity, and function as a production plan correction means for executing a correction process for subtracting the difference from the daily production quantity of this sale. And

(Function)
According to the present invention, the daily inventory quantity is calculated for each sale based on the sales plan data recorded in the sales plan data storage means, and the difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity is calculated based on the long-term cycle. The daily production quantity is calculated by subtracting the difference from the daily inventory quantity. Thereby, it is possible to perform management in an integrated manner while selling a management cycle consisting of a short-term cycle or a long-term cycle. Furthermore, the sales to which the short-term cycle is applied are identified, the current inventory amount recorded in the inventory management data storage means is obtained by the short-term cycle, and the difference obtained by subtracting the appropriate inventory amount from the current inventory amount is calculated. The correction process which subtracts the difference from the daily production volume of sales is executed. Thereby, a production plan can be corrected according to a short-term cycle. Therefore, even when management cycles consisting of short-term cycles or long-term cycles coexist, a production plan can be made efficiently.

  According to the present invention, since the management computer totals the daily inventory amount for each model identification identifier, the total production amount is calculated for each model even when management cycles consisting of short-term cycles or long-term cycles are mixed. Can do.

  According to the present invention, for each sale, the management computer calculates the daily inventory amount by applying the distribution data recorded in the distribution data storage means to the total amount included in the sales plan data. As a result, if the total sales amount can be acquired, the number of sales can be expanded to the number of sales per day.

  According to the present invention, it is possible to efficiently produce a production plan by integrating inventory management of products having different management cycles.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. In this embodiment, a product sold at a sales company will be described as an inventory management system, an inventory management method, and an inventory management program for production management when producing products in a production area. In this embodiment, it is assumed that the products to be managed are a weekly management product as a short cycle management cycle and a monthly management product as a long cycle management cycle.

  As shown in FIG. 1, a sales company system 10 is connected to a production management server 20 via a network. This production management server 20 functions as an inventory management system. The production plan generated by the production management server 20 is provided to the production zone system 30.

  The sales company system 10 is a computer system of a sales company that sells products, and includes control means (CPU), storage means (RAM, ROM, etc.), communication means, and the like. The sales company system 10 provides sales plan data and inventory data to the production management server 20. Here, the sales company system 10 provides the sales plan data every month and sequentially provides the inventory data.

The production management server 20 connected to the sales company system 10 is a computer server that makes a production plan for each product in response to the sales plan of the sales company. The production management server 20 includes a management computer 21. The management computer 21 includes control means (CPU), storage means (RAM, ROM, etc.), communication means, etc., not shown. The production management server 20 performs processing (processing including a production plan generation stage, a production plan correction stage, etc.) described later. By executing the inventory management program for this purpose, the management computer 21 functions as production plan generation means, production plan correction means, and the like described in the claims.

  The production management server 20 includes a management form data storage unit 22 as a management form data storage unit, a sales plan data storage unit 23 as a sales plan data storage unit, a production plan data storage unit 24, and an inventory as a stock management data storage unit. A management data storage unit 25, a proper stock data storage unit 26 as a proper stock data storage unit, and a daily data storage unit 27 are provided.

  As shown in FIG. 2, the management form data storage unit 22 stores management form data 220 for specifying a management form of a product sold at each sales company. The management form data 220 is registered when a management form of a product sold by each sales company is determined, and is updated when the change is made. The management form data 220 includes data relating to a sales company identifier, a product identifier, and a management form identifier.

In the sales company identifier data area, data relating to an identifier assigned to identify each sales company is recorded.
In the product identifier data area, data relating to an identifier assigned to identify each product is recorded with respect to products sold by this sales company. Here, by combining the sales company identifier and the product identifier, it is possible to function as information for identifying each sale.

  In the management form identifier data area, data for specifying a management form in the case of managing this product in this sales company is recorded. In this embodiment, the management form identifier includes a weekly management flag for specifying weekly management (short-term cycle management) and a monthly management flag for specifying monthly management (long-term cycle management). .

  As shown in FIG. 3, the sales plan data storage unit 23 stores sales plan data 230 of each product sold at each sales company. The sales plan data 230 is registered when the sales plan is prepared by each sales company, and is registered when the sales plan data 230 is provided to the production management server 20. The sales plan data 230 includes data related to a planned month, a sales company identifier, a product identifier, and the number of sales plans.

Data related to a month to which the sales plan is applied is recorded in the planned month data area.
In the sales company identifier data area, data relating to an identifier assigned to identify each sales company is recorded.

In the product identifier data area, data relating to an identifier assigned to identify each product is recorded with respect to products sold by this sales company.
In the planned sales number data area, data related to the planned number (total number) of sales planned for this product in the sales company is recorded in the planned month.

  As shown in FIG. 4, the production plan data storage unit 24 stores production plan data 240 for each product sold at each sales company. This production plan data 240 is recorded when a production plan of each product sold at each sales company is calculated. The production plan data 240 includes a plan month, a sales company identifier, a product identifier, and data related to the production plan.

Data related to a month to which the production plan is applied is recorded in the planned month data area.
In the sales company identifier data area, data relating to an identifier assigned to identify each sales company is recorded.

In the product identifier data area, data relating to an identifier assigned to identify each product with respect to a product sold by this sales company is recorded.
In the production plan data area, data for specifying the planned number of products planned to be produced by this sales company is recorded. Here, the production plan is composed of the number of daily productions corresponding to each day of the planned month.

  As shown in FIG. 5, the inventory management data storage unit 25 stores inventory data 250 relating to the inventory status of each product sold at each sales company. The stock data 250 is also recorded in the stock management data storage unit 25 when the number of stocks of each product sold at each sales company is registered in the sales company system 10. The inventory data 250 includes data related to date, sales company identifier, product identifier, and inventory quantity.

In the date data area, data relating to the date when the inventory quantity is registered is recorded.
In the sales company identifier data area, data relating to an identifier assigned to identify each sales company is recorded.

In the product identifier data area, data relating to an identifier assigned to identify each product with respect to a product sold by this sales company is recorded.
In the inventory quantity data area, data relating to the inventory quantity of this product in this sales company is recorded.

  As shown in FIG. 6, the appropriate inventory data storage unit 26 stores appropriate inventory data 260 relating to the appropriate inventory of each product sold by each sales company. The appropriate inventory data 260 is recorded when the appropriate inventory number of each product sold by each sales company is determined and registered. The appropriate inventory data 260 is configured to include data relating to a sales company identifier, a product identifier, and an appropriate inventory quantity.

In the sales company identifier data area, data relating to an identifier assigned to identify each sales company is recorded.
In the product identifier data area, data relating to an identifier assigned to identify each product with respect to a product sold by this sales company is recorded.
In the appropriate inventory quantity data area, data relating to the appropriate inventory quantity of this product is recorded in this sales company.

  As shown in FIG. 7, the daily data storage unit 27 stores daily data 270 as distribution data for expanding the monthly sales plan number to the daily sales number. The daily distribution data 270 is recorded when the ratio for daily distribution is determined and registered for each product. The daily data 270 includes data relating to the product identifier and the daily table.

In the product identifier data area, data relating to an identifier assigned to identify each product with respect to a product sold by this sales company is recorded.
In the daily distribution table data area, data relating to the ratio of distributing the number of sales plans for each month is recorded for each day of the month. The daily distribution table is set so that each ratio is “100%”.

Next, a processing procedure in the case of planning and managing a production plan using the above system will be described. The production plan management process (FIG. 8) performed in this embodiment is the production plan planning process (FIG. 9).
The weekly correction process (FIG. 10) is included. Hereinafter, each process will be described separately.

<Production plan management processing>
The management computer 21 of the production management server 20 executes production plan management processing. In this case, the management computer 21 executes a schedule management process (step S1-1). Specifically, the management computer 21 acquires the current date using a built-in calendar function.

  Then, the management computer 21 determines whether or not the acquired current date corresponds to the beginning of the week (step S1-2). If the acquired current date does not correspond to the beginning of the week (in the case of “NO” in step S1-2), the management computer 21 continues the schedule management (step S1-1).

  On the other hand, when the acquired current date corresponds to the beginning of the week (in the case of “YES” in step S1-2), the management computer 21 determines whether the current date corresponds to the beginning of the month (step S1-3). ).

  When the current date corresponds to the beginning of the month (in the case of “YES” in step S1-3), the management computer 21 first executes a production plan planning process (step S1-4). This production planning process is a process for determining the daily production number for each product of each sales company. The management computer 21 of the production management server 20 sequentially executes this production plan planning process for every product of each sales company for all products of all sales companies.

(Production planning process)
This production planning process will be described with reference to FIG. Here, first, the management computer 21 specifies the product of the sales company that is the target of the production planning process using the sales company identifier and the product identifier.

  And the management computer 21 acquires a sales plan (step S2-1). Here, the management computer 21 specifies the sales plan data 230 recorded in the sales plan data storage unit 23 using the sales company identifier and product identifier to be processed, and acquires the number of sales plans for the product to be processed.

  Then, the management computer 21 executes a daily distribution process for the acquired number of sales plans (step S2-2). Here, the management computer 21 extracts the daily distribution table recorded in the daily distribution data storage unit 27 using the sales company identifier and product identifier to be processed. Then, the ratio of the extracted daily distribution table is multiplied for each planned date (for example, business days) by the planned sales number of the product to be processed, thereby forming the daily inventory configured from the daily inventory planned number for each planned date. Calculate inventory plan.

  Next, the management computer 21 acquires the current inventory quantity (step S2-3). Here, the management computer 21 acquires the current inventory number recorded in the inventory management data storage unit 25 using the sales company identifier and product identifier to be processed.

  Next, the management computer 21 calculates the daily production number (step S2-4). In this case, first, the management computer 21 acquires the appropriate inventory quantity from the appropriate inventory data storage unit 26 using the sales company identifier and product identifier to be processed. Then, the management computer 21 calculates a difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity acquired previously. Next, the management computer 21 calculates a daily production plan composed of the daily production numbers for each planned date by subtracting this difference from the initial value of the calculated daily inventory plan number.

  The management computer 21 records the daily production plan (step S2-5). Here, the management computer 21 records in the production plan data storage unit 24 a daily production plan configured from the number of daily productions for each planned date in association with the sales company identifier and product identifier to be processed.

  When the processing for the product with the sales company identifier and the product identifier specified as the processing target is completed, a product for which the production planning process has not been completed is specified, and steps S2-1 to S2-5 are repeated. When the production planning process is completed for all products of all sales companies, the process returns to the process of FIG.

  Here, the management computer 21 executes a production total number calculation process (step S1-5). In this total production calculation process, all daily production plans are totaled for each planning date and each product identifier, and an overall production plan is created. This production plan is provided to the production zone system 30, and the production zone produces each product based on this production plan.

(Weekly correction process)
On the other hand, when the acquired current date does not correspond to the beginning of the month (in the case of “NO” in step S1-3), the management computer 21 executes weekly correction processing (step S1-6). This weekly correction process is a process related to correction of a production plan for a weekly managed product. Hereinafter, a description will be given with reference to FIG.

  This process is executed only for products managed weekly. Therefore, the management computer 21 specifies a weekly management target (step S3-1). Here, the management computer 21 extracts the management form data 220 in which the weekly management flag is recorded from the management form data storage unit 22. Then, this weekly correction process is sequentially performed on the products included in the management form data 220 for each product of each sales company. First, the management computer 21 specifies a product of a sales company to be subjected to weekly correction processing using a sales company identifier and a product identifier.

  Then, the management computer 21 specifies a production plan to be processed (step S3-2). Here, the management computer 21 acquires a production plan from the production plan data storage unit 24 using the sales company identifier and product identifier to be processed.

  Next, the management computer 21 acquires the current inventory quantity (step S3-3). Here, the management computer 21 acquires the current inventory number recorded in the inventory management data storage unit 25 using the sales company identifier and product identifier to be processed.

  Next, the management computer 21 corrects the number of production so that a proper stock can be maintained based on the number of stock (step S3-4). First, the management computer 21 acquires the appropriate inventory quantity from the appropriate inventory data storage unit 26 using the sales company identifier and product identifier to be processed. Then, the management computer 21 calculates a difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity acquired previously. Then, the management computer 21 corrects the production number by subtracting this difference from the first weekly value of the identified production plan. As a result, the inventory quantity at the beginning of the week matches the appropriate inventory quantity.

  When the processing for the product with the sales company identifier and the product identifier specified as the processing target is completed, the weekly management target product for which the weekly correction processing has not been completed is specified, and each step S3-1 to S3-4 is repeated. . When the weekly correction process is completed for all weekly managed products, the process returns to the process of FIG.

  Here, the management computer 21 executes a production total number calculation process (step S1-5). In the total production calculation process, all daily production plans are totaled for each planning date and each product identifier to correct the entire production plan. This production plan is provided to the production zone system 30, and the production zone produces each product based on this production plan.

As described above, according to the present embodiment, the following effects can be obtained.
In the above embodiment, the sales plan data storage unit 23 stores the sales plan data 230 related to the sales plan of each product sold by each sales company. The sales plan data 230 includes data related to a planned month, a sales company identifier, a product identifier, and the number of sales plans. Then, the management computer 21 executes a daily distribution process for the acquired number of sales plans (step S2-2). Furthermore, the management computer 21 acquires the current inventory quantity (step S2-3). Next, the management computer 21 calculates the daily production number (step S2-4) and records the daily production plan (step S2-5). As a result, even when products with different management cycles are mixed, such as a monthly management product and a weekly management product, they can be integrated and managed in the same process. Therefore, a common management system can be constructed in accordance with the state of product management, so that inventory management can be performed efficiently.

  In the above embodiment, the management computer 21 specifies a weekly management target (Step S3-1) and acquires a production plan (Step S3-2). Then, the management computer 21 acquires the current inventory quantity (step S3-3), and corrects the production quantity so that the appropriate inventory can be maintained based on the inventory quantity (step S3-4). Thereby, even when different management cycles are mixed, they can be integrated and managed by the same process. Therefore, it is possible to manage production of products whose sales volume changes drastically by following the changes.

In addition, you may change the said embodiment into the following aspects.
○ In the above embodiment, weekly management and monthly management are integrated, but the management is not limited to this, and management is performed by mixing different periods (for example, biweekly and bimonthly management). Applicable when performing.

  ○ In the above embodiment, management is performed by integrating two types of management, weekly management and monthly management. However, the present invention is not limited to this, and management by mixing more types of periods is possible. It can also be done. Also in this case, correction processing is performed for each period.

  In the above embodiment, the sales plan data storage unit 23 stores the sales plan data 230 related to the sales plan of each product sold at each sales company. As the sales plan number of the sales plan data 230, the planned number (total number) planned to be sold by the sales company is recorded in the planned month. Instead, the daily sales quantity may be acquired from the sales company system 10 and recorded in the sales plan data storage unit 23. In this case, the daily distribution process for the number of sales plans can be omitted.

1 is a schematic diagram of a system according to an embodiment of the present invention. Explanatory drawing of the data recorded on the management form data storage part. Explanatory drawing of the data recorded on the sales plan data storage part. Explanatory drawing of the data recorded on the production plan data storage part. Explanatory drawing of the data recorded on the inventory management data storage part. Explanatory drawing of the data recorded on the appropriate stock data storage part. Explanatory drawing of the data recorded on the daily data storage part. Explanatory drawing of the process sequence of one Embodiment of this invention. Explanatory drawing of the process sequence of one Embodiment of this invention. Explanatory drawing of the process sequence of one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Sales company system, 20 ... Live sales management server as inventory management apparatus, 21 ... Management computer, 22 ... Management form data storage part as management form data storage means, 23 ... Sales plan data storage as sales plan data storage means , 24 ... Production plan data storage unit, 25 ... Inventory management data storage unit as inventory management data storage unit, 26 ... Appropriate inventory data storage unit as appropriate inventory data storage unit, 27 ... Daily data storage unit, 30 ... Production zone system.

Claims (5)

Management form data storage means for recording data for specifying a management cycle applied for each sales in a short cycle or a long cycle management cycle;
Sales plan data storage means for recording sales plan data for each sale;
Sequentially for each sale, inventory management data storage means for recording data on the current inventory amount,
An appropriate inventory data storage means for recording data on the appropriate inventory quantity;
An inventory management system comprising a management computer for calculating a production plan,
The management computer is
Based on the sales plan data recorded in the sales plan data storage means according to the long-term cycle, the daily inventory quantity is calculated for each sale, and the difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity is calculated. Production plan generating means for subtracting the difference from the next inventory quantity to calculate the daily production quantity;
Identify sales to which the short-term cycle is applied, acquire the current inventory amount recorded in the inventory management data storage means by the short-term cycle, calculate a difference obtained by subtracting the appropriate inventory amount from the current inventory amount, An inventory management system which functions as a production plan correction means for executing a correction process for subtracting the difference from the daily production volume of sales. The information for specifying the sale includes a model specifying identifier for specifying the model to be sold,
The inventory management system according to claim 1, wherein the management computer further functions as a means for totaling a daily inventory quantity for each of the model specifying identifiers. The inventory management system further includes distribution data storage means for recording distribution data for distributing the sales plan total amount corresponding to the planned date,
The said management computer calculates the daily inventory quantity by applying the distribution data recorded in the said distribution data storage means to the total quantity contained in sales plan data for every sale. 2. The inventory management system according to 2. Management form data storage means for recording data for specifying a management cycle applied for each sales in a short cycle or a long cycle management cycle;
Sales plan data storage means for recording sales plan data for each sale;
Sequentially for each sale, inventory management data storage means for recording data on the current inventory amount,
An appropriate inventory data storage means for recording data on the appropriate inventory quantity;
A method of managing inventory using an inventory management system comprising a management computer for calculating a production plan,
The management computer is
Based on the sales plan data recorded in the sales plan data storage means according to the long-term cycle, the daily inventory quantity is calculated for each sale, and the difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity is calculated. A production plan generation stage for calculating the daily production by subtracting the difference from the next inventory,
Identify sales to which the short-term cycle is applied, acquire the current inventory amount recorded in the inventory management data storage means by the short-term cycle, calculate a difference obtained by subtracting the appropriate inventory amount from the current inventory amount, An inventory management method, comprising: executing a correction process for executing a correction process for subtracting the difference from the daily production volume of the sales. Management form data storage means for recording data for specifying a management cycle applied for each sales in a short cycle or a long cycle management cycle;
Sales plan data storage means for recording sales plan data for each sale;
Sequentially for each sale, inventory management data storage means for recording data on the current inventory amount,
An appropriate inventory data storage means for recording data on the appropriate inventory quantity;
A program for managing inventory using an inventory management system having a management computer for calculating a production plan,
The management computer,
Based on the sales plan data recorded in the sales plan data storage means according to the long-term cycle, the daily inventory quantity is calculated for each sale, and the difference obtained by subtracting the appropriate inventory quantity from the current inventory quantity is calculated. Production plan generating means for subtracting the difference from the next inventory quantity to calculate the daily production quantity;
Identify sales to which the short-term cycle is applied, acquire the current inventory amount recorded in the inventory management data storage means by the short-term cycle, calculate a difference obtained by subtracting the appropriate inventory amount from the current inventory amount, An inventory management program that functions as a production plan correction means for executing a correction process for subtracting the difference from the daily production volume of sales.

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