JPH0660085A - Materials requirement plan forming system - Google Patents

Abstract

PURPOSE:To form a materials requirement plan for manufacturing across plural factories and sections whose working date calendars are different, on a single system. CONSTITUTION:The plural kinds of working date calendars are registered in a working date calendar file 5 according to the actual working date of each factory and section. Then, a factory code table 6 is constructed in order to relate the working date calendars with the factories and sections, and a factory code is set as the item of a list of item master file 8 in a parts chart information file 7 in order to relate the list of items with the factory in charge of the manufacture. Thus, the formation of the materials requirement plan across the plural factories can be attained by using the factory code as a key.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material requirement planning method, and in particular, a material requirement plan in the case where manufactured items are manufactured in a plurality of production plants or a plurality of production departments having different working days or material requirement planning cycles. Concerning the planning method of.

[0002]

2. Description of the Related Art A conventional material requirement planning method uses a single working day calendar information file for one system and requires each item to be arranged at each stage of item composition according to the item composition of a parts table. Based on the lead time, the required time of the material is calculated by tracing back the date of the working calendar by the number of days of the lead time required for the arrangement, and the manufacturing order information is generated.

Therefore, conventionally, a product manufactured over a plurality of production plants (hereinafter referred to as factories) or a plurality of production departments (hereinafter referred to as departments) having different working days or material requirement plan cycles is Each factory has its own system, and after dividing and maintaining standard information such as parts list and working day calendar, each factory makes necessary material plans.

[0004]

According to this conventional material requirement planning method, in a product manufactured across a plurality of factories or departments having different working days or material requirement planning cycles, the product composition in the parts table information is It is necessary to carry out material requirement development based on information arrangement lead time at least as many times as the number of factories involved.

For example, in the case of a product manufactured in the A factory from the A factory to the B factory in the manufacturing process,
After the material requirements of the factory have been expanded, the material requirements of the factory B must be expanded, and then the material requirements of the factory A must be expanded again. Therefore, there is a problem that it takes time to prepare a material requirement plan, and that each factory and each department must individually install an information processing device.

[0006]

The present invention is a method for drafting a material requirement plan in a plurality of production plants, which has an operating day calendar information file corresponding to the operating days of each of the production plants, By associating the factory and its operating day calendar with the factory code as a key, the material requirement amount is developed in consideration of the actual operating day of each factory, and the manufacturing order information is generated based on this. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a conceptual diagram of a material requirement planning system. In FIG. 1, the requirement planning method of the present invention adds a reference schedule planning file 10 to a material requirement expanding unit 4,
Working day calendar information file 5, factory code table 6
Also, referring to the parts table information file 7, the material requirements are developed for each item in consideration of the operating days of the factory and department in charge of manufacturing, and the production of the manufacturing order is realized.

The working day calendar information registration unit 1 inputs working days and rest days (vacations, inventory days, holiday transfers) through the terminal device 13 based on the working schedule of the factory or department, and the working day calendar information file 5 Register to. The factory code table registration unit 2 inputs the operation day calendar code by the terminal device 14 as a key in order to create a table in which the operation day calendar registered in the above operation day calendar information registration unit 1 is associated with the factory code. To do. that time,
When a working day calendar code that is not registered in the working day calendar information file 5 is entered, a message indicating that it is not registered in the working day calendar information file 5 is displayed on the terminal device 1.
Send to 4.

After the input of the working day calendar code, when the working day calendar code exists in the working day calendar information file 5, the factory code input screen is transmitted and the input of the factory code is accepted. A table in the record format as shown is created and registered in the factory code table 6. When adding a factory code, see Fig. 2 (b).
As shown in, the factory code additionally registered is added after the factory code at the end of the record, and the record is updated.

The parts table information registration unit 3 writes item information (item number, item name, standard, lead time, in-house / outside) to the item master file 8 and the item structure master file 9 included in the parts table information file 7. Item-specific attribute information such as crop classification and factory code) and item composition information (parent item number, child item number, component unit quantity: the number of child items required when one parent item is manufactured, etc.) Information indicating the relationship between items) and

In the present invention, by registering the factory code items in the item master file 8 from the parts table information registration section 3 by the terminal device 15, the factory or department which manufactures each item unit, and eventually each item. It relates to the working days that can be manufactured. Then, the material requirement expansion unit 4 calculates the material requirement based on the reference schedule planning information (the production order completion date of the highest-order item) in the reference schedule planning file 10 generated by the reference schedule planning system by the terminal device 16. Expansion is performed, manufacturing order information is generated for each item of each level of the item configuration information, and the manufacturing order information is stored in the manufacturing order information file 11.

Next, an example of this manufacturing order information generation system is shown below.

In the product A having the parts table information shown in FIG. 3, the factory codes a and b have the same processing cycle when the material requirement planning cycles with different working day calendars are the same.
This will be described with reference to the flowchart shown in FIG.

First, the production order start date of the production order of the product A is calculated by taking the lead time days from the production order completion date of the standard schedule into consideration of the working day calendar holidays of the factory code a. To generate the manufacturing order of the product A. In this example, two days before the order completion date is a holiday, so the order starting date of the product A is the day before that.

Here, the calculated production lot start date and quantity of the product A are developed into the demand information of the subordinate items a and b (see FIG. 5). The demand information for the item a is generated on the same day corresponding to the order start date of the product A, while the demand information for the item b is the manufacturing order start date of the product A is the working day of the factory that manufactures the item b. According to the calendar, it is set as a holiday. Therefore,
As the demand information for the item b, the demand information for the item b is generated on the day immediately before the start of the manufacturing order of the product A.

Since the demand information for the items a and b thus generated becomes the manufacturing order end date of the items a and b, the lead time in each information of the items a and b is based on this information. Based on the factory code, as in the case of the product A, the production order start dates of the items a and b are calculated, and the production order is generated.

The above-described processing is repeated until the end item of the item configuration information, and the production order information is generated for all the configuration items of the product A. Then, the generated manufacturing order information is registered in the manufacturing order information file 11 every time the manufacturing order is generated. In this way, in the present invention, a single system can be used for material requirement planning of manufactured items across multiple factories and departments with different working days.
It is realized in a single processing cycle.

Next, the case where the cycle of material requirement planning is different will be described. In this case, the information such as the parts table information and the factory code is based on the content shown in FIG. 3 as in the case described above, and the factory having the factory code a is the target of the material requirement planning.

The processing in this case will be described with reference to the flow chart shown in FIG.

First, as a first process, a factory code to be planned is specified, this code is matched with the factory code in each item information when the manufacturing order of each item is generated, and only the item having the matching factory code is manufactured. Is generated. In this case, the subordinate items below the item b have the factory code b, and thus are excluded from the material requirement planning. Then, at the time of planning, the factory code b is used as a target to generate a manufacturing order based on the demand information for the item b generated this time, and to develop the material requirements.

As described above, according to the present invention, by identifying the factory code, it is possible to deal with a case where a plurality of factories having different material requirement planning cycles are covered by a single system.

[0023]

As described above, according to the present invention, when a material requirement plan for a manufactured item that extends over a plurality of factories or departments with different working days is prepared, a plurality of working day calendars are divided and referred to by a factory code. By doing so, it is possible to plan in a single processing cycle in a single system, so that it is possible to significantly reduce the processing time, it is possible to integrate the equipment of the information processing device, and it is possible to reduce the capital investment cost. Have an effect.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a material requirement planning system which is an embodiment of the present invention.

FIG. 2 is a diagram showing a record configuration of a factory code table in FIG.

FIG. 3 is a conceptual diagram showing an example of a parts table information file in FIG.

FIG. 4 is a flow chart showing a processing procedure of a material requirement developing unit of FIG.

FIG. 5 is a conceptual diagram for explaining an example of material requirement development.

[Explanation of symbols]

 1 Working day calendar information registration section 2 Factory code table registration section 3 Parts list information registration section 4 Material requirement expansion section 5 Working day calendar information file 6 Factory code table 7 Parts list information file 8 Item master file 9 Item composition master file 10 Standard schedule planning file 11 Manufacturing order information file 12 Information processing device 13 to 16 Terminal device

Claims (1)

[Claims] 1. A method of drafting a material requirement plan in a plurality of production plants, which has an operating day calendar information file corresponding to the operating days of each of the production plants, and stores each of the production plants and their operating day calendars. A material requirement planning method characterized by expanding the material requirements in consideration of the actual operating days of each factory by using the factory code as a key and generating manufacturing order information based on this.