JPS6393549A - Material requirement program processing system - Google Patents

Abstract

PURPOSE:To shorten a time necessary for processing a requirement program by registering renewed necessary data together with a material number to an area for registering a material to be re-processed when a material requirement program is to be re-calculated to re-process only the requirements to be re-calculated. CONSTITUTION:A material of a required number DN is taken out from a list in question of a material requirement program (referred to as MRP, hereafter) in steps 1, 2, then the number DN is searched. When the number is found, it is checked whether there is a supply number for it in a step 4. Since the number DN has been just registered and the supply number is blank, a required number D4 just before it is searched and detected in a step 5. Then, it is detected whether there is a supply number corresponding to the number D4, i.e., whether a supply number S2 is registered in the case. A supply for the number S2 is a sum of the requirement of numbers D3, D4, D5 and then the requirement of the D3 which is necessary at the earliest time becomes an object to be calculated, whereby a processing time for the MRP can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a processing method for material requirement planning, which is the central part of a production control system that incorporates seven techniques for drawing screen material requirements in the assembly industry.

[Conventional technology]

Conventionally, in this type of material requirements planning process, material requirements planning (Material Requirement
) lanning (hereinafter referred to as MRP) When I felt relieved to do the calculation again, I had registered all the material numbers in the area to be registered on the target material. Then, I took out each material registered here and performed all MRP calculations for all locations registered for that material.

[Problem that the invention seeks to solve]

In the conventional material requirement planning process described above, only material numbers are set in the area for registering materials that are subject to reprocessing in MRP calculations, so requirements that are not subject to reprocessing are also recalculated and the processing time is The disadvantage is that it creates waste.
)Ta. In other words, if the material becomes subject to reprocessing due to a particular change in requirements, some requirements may not be subject to reprocessing depending on the content of the change.Is that requirement an example? Since there was no area to set it, there was a drawback that non-target requirements were also reprocessed.

[Means to solve problems]

In the material requirement planning processing method of the present invention, the reason for reprocessing the MRP calculation is particularly when a required change occurs.

That updated required information? Is the material subject to reprocessing along with the material number? Details will be explained in the registration area. If you refer to the 4th battle, document number N! The fcP9r requirement number DN added to the requirement for materials is the newly registered requirement number.

That is, the supply number S1+S given for the material with material number Nri! The supply indicated by and S3 is the result of the MRP calculation when the requirement of the requirement number DN does not exist.

31st, '(i-Referring to the requirement number D) l, the material number is added to the material requirement planning problem list 31.'
Nl and required number DN are registered. Referring to the second meeting, the data structure of the database to be performed in Process 7 of an embodiment of the present invention is as follows.

Material record 11. Product composition record 12. Required records 13. A parent set 15 and a child set 16 exist between the material record 11 and the product configuration record 12.
A required set 17 exists between and the required record 13, and between the material record 11 and the required record 13,
A supply set 18 is present. Next, execution of material requirement planning processing, which is an embodiment of the present invention, will be described in detail.

Refer to Figures 1, 2 and 4.

First, in steps 1 and 2, materials with material number Nl and requirement number ItN are taken out from the material requirement planning problem list 31. Next, in step 3, the required set 17 in Figure 2
The required number DN is searched for in the required record 13.

When the required number DN is found, the presence/absence of the supply number in the required record 13 is checked in step 4. The required number DNU is blank because it has just been registered. Therefore, in step 5, the immediately preceding IS number is searched. When the desired number D4 is found as a result of the search, the presence/absence of the supply number in the record of the desired number D4 is detected in step 4. A supply number Sz is registered in the record with the requirement number D3. This is supply number S2
This is because the supply of requirement numbers D B rD4 and RI are combined, and among the requirements, the one with the earliest required date is the requirement of D3. therefore,
This requirement number D30 becomes the first requirement in the MRP calculation, and standard material requirement planning processing is executed from here.

〔Effect of the invention〕

As explained above, the present invention has an MR
When performing P calculation, among the requirements updated due to the change, the requirement number with the earliest requirement date must be registered in the list of all material requirements planning problems, and the requirement that does not need to be subject to MRP calculation before the Wr reduction. This has the effect of reducing the total processing time for material requirements planning.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows MR.
P calculation? Diagram showing the data structure of the database, Part 3
Figure 4 shows the entire structure of the material requirements planning problem list, and Figure 4 shows the actual data registered in the database shown in Figure 2. In Figure 2, 11...Material record% 12...Product composition record, 13...
...Required Level 6 First Grade 2 Figure Ihi I Kyou

Claims (1)

[Claims] A material requirement planning processing method characterized by registering changed requirement information in an area for registering material numbers subject to material requirement planning processing.