JPS61136161A - Working process planning systsem for individual production - Google Patents

Abstract

PURPOSE:To continue the production of all prodcucts until the designated date for end of production of each product in consideration of the effects given to the processes of each parts with each other, by setting a working process plan with the allocation of working processes done in the order of working dates according to the number of margin days and the working time in each process in case each parts of plural products is produced through each process. CONSTITUTION:The commend of production is newly given to a product A while some processes of each parts are already started or completed with some products. thus the informations on the parts constitution and the working process of the product A are supplied together with the indicated date for the start of production and the indicated date for end of production for the product A. Then both the earliest and latest start dates are calculated for each process based on the information on the scheduled working data and working time, etc. at a factory stored in a memory 11. When these inflormation are obtained, the overall factory working process schedule is set and all products that can be started on the scheduled day for production are selected. then the parts are allocated as the process jobs in the order of smaller maring days and within the range of the working time on the relevant day. Such procedures are applied to all stages.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a processing process in which the work order in each process is determined based on process information in a factory that manufactures products of different types for each item. It concerns planning methods.

[Conventional technology]

Conventionally, several methods have been proposed for work planning. Among these, in individual production, the method called pHi:RT as shown in Figure 5 is one of the methods that has been often used. Science J (B, 7).

In the figure, (2f) is paper, and (here) is this paper (λ
l) The arrow written above (C3) is the circle shown at both ends of this arrow (2J), and the combination of the circle (,2J,) and the arrow (Y2) represents the overall plan of the work. and wrote it on a piece of paper.

Next, we will explain how to create a conventional plan as shown in Figure 5. First, when planning work, the content of the work is analyzed in chronological order, and a
, b, ......j, and the work units are indicated by arrows (
22), circle the connection point between the work units (
2J) and expressed the overall work plan by relating the disassembled work units to each other.

[Problem that the invention seeks to solve]

According to Blue Pax's "Science of Planning," the conventional planning method using PERT shown in Figure 5 was originally developed for missile development plans, and was used for projects such as the construction of dams and buildings. It is used and exerts its power. In this way, PERT is a very effective method for achieving a single large goal; There was a problem with different conditions at the manufacturing plants. In other words, since each process is made up of limited resources such as machines, people, and time, the manufacturing of one product will always affect the manufacturing of other products, and PERT alone cannot solve the problem of multiple processes that take this influence into account. The problem was that it was very difficult to plan the product process.

This invention was made to solve these problems.
It is an object of the present invention to provide a processing process planning method that takes into account mutual influences and that all products are completed by their respective manufacturing completion instruction dates.

[Means for solving problems]

The processing process planning method in individual production according to this invention is as follows:
For each product you plan to manufacture, calculate the earliest and latest start dates for each process for each part, and calculate all! While considering the start and completion status of each part of the J product's process, we sequentially select all the parts that can be started for each process in accordance with the scheduled start date of the factory, and calculate the number of days until the latest start date, that is, the number of remaining days. It is best to allocate work to the mill from a small number of steps and create a processing process plan.

[Effect]

In this invention, -C selects two parts that can be started for each process from among each process of each part of the d number of products, and creates a processing process plan so that the parts with the least number of spare days are started first.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.
1) is a factory processing site, (2ac(2b)...(2j)
is the processing site (each of the constituent processes, (3) is the processing site (
This is the process planning management department that is in contact with 1), and in FIG. 2, arrows show how parts 0/, 0ko, and 03 that make up the product are processed through each process. In addition to these, many parts of other products (not shown) pass through each process.

Figure 1 shows the processing flow for creating a processing process plan to control the processing flow at the processing site (/) in the process planning management department (3). Calculate the earliest start date and latest start date,
For products that have already started manufacturing, enter the actual results.
It shows how a processing plan is created for all finished products.

Intermediate information and modification 8 fiI image information are stored in a storage device (ll
).

FIG. 3 is a block diagram showing an example of the information processing device (10) that forms the main part of the process planning management department (3), and the information input via the input/output device (/3) is centrally processed. Device(/
λ) and then stored in the storage device (ll). In addition, processing process planning information for the entire factory calculated by the central processing unit (lco) based on the information stored in the storage device (11) is stored in the storage device (//) as well as other information as needed. is output from the output device (l<zn) according to

Figure V is a table showing the processing process information for each part regarding product A illustrated in Figure 2, and these are
lc13) to the storage device (//).

Next, the procedure for creating a machining process plan for the entire factory based on these will be explained with reference to FIG.

- For example, when some processes for each part of several products have already been started or completed, product A shown in Figures 2 and 5 is newly manufactured. When a command is received and a machining process plan is created for the entire factory, for product A that must be newly started, input the component configuration of product A and the machining process information shown in Figure V (step Bi). , the date of instruction to start manufacturing and the date of instruction to complete manufacturing for product A are input (step 3.2).

Then, along with information such as the scheduled factory operating date and operating hours, which have already been input when the factory operating plan has been decided in advance (step S3) and are stored in the storage device (11),
The earliest start date and latest start date for each process are calculated (step S<<).

For products that have already been started, similar calculations are performed before the start, and results such as process start and process completion are entered (step sr), and this update information is also stored in the storage device (/
/) is stored and retained.

Once this information is gathered, it is necessary to create a processing plan for the entire factory. As a method,
For example, when making a plan starting tomorrow, after checking all the actual results such as process start and process completion up to today, set the planning date to tomorrow.Step 5b) (Step 37)
). Then, parts with the least number of spare days are assigned as work for that process within the operating hours of that day (step sg).

Do this for all processes.

Next, assuming that all of the assigned tasks will be completed as planned, we will examine the next process and, if the conditions are right, we will be able to start the next process (step Sq). Advance the date by one day (step 51)
0), if the entire period has not been completed, the same work will be repeated (steps 87 to 570), but if it has been completed, ftf7j
In this way, the machining process plans for all products, including the products that have already been started and the product A that is about to start, are completed, and the results are displayed on the output device, for example. (/II) to show each step.

Here, we have described the case where the number of days a certain part stays in a certain process is given as part of the machining process information in the form shown in Figure V. The length of stay may be calculated using a certain formula.

〔Effect of the invention〕

As described above, according to the present invention, when each part of a plurality of products is manufactured through each process, the parts are allocated in the order of 8 operations based on the number of spare days and operation time in each process. Since we create a processing process plan, we create a processing process plan that takes into account the effects of each process for each part on each other, and aims to complete manufacturing of all products by the specified manufacturing completion date, and then proceed to the manufacturing site. This has the effect of ensuring smooth manufacturing and ensuring process reliability.

[Brief explanation of the drawing]

FIG. 1 is a process flow diagram showing an embodiment of the present invention, FIG. 2 is a conceptual diagram showing the configuration of a factory, FIG. 3 is a block diagram showing an example of an information processing device, and FIG. FIG. 5, which is a diagram showing a table of processing process information for parts, is an introduction to conventional planning regarding product AK. (υ... processing site, (ko&)<kobba2c) (,2d)
(λe)(2f)C2g)(kohJ(ko1ba2J)...
Process, (3)...Process planning management department, (S...Arrow, (
10)...Information processing device, (//)...Storage device, (1
2)... Central processing unit, (/J)... Input/output device, (l
<z)...Output device. In each figure, the same reference numerals indicate the same or corresponding parts. Flood 2 Figure 1 I --J

Claims (1)

[Claims] In a factory that manufactures products of different types for each item, there is a process for inputting the component configuration of a certain type of product and processing process information for each part, that is, the order of processing steps and processing time for each process. a second means for inputting a production start date and a production completion instruction date for the product of the type; and a third means for inputting a scheduled factory operation date and operating hours for each scheduled operation date; Based on the information input by the first means to the third means, calculate the earliest start date and latest start date of all processes for all parts of that part when only that part is manufactured. a fourth means for inputting information on which process of which part of which product has been started and which process has been completed for each product being manufactured each day; a sixth means for storing and retrieving the information obtained by the first to fifth means; and a sixth means for storing and retrieving information obtained by the sixth means; A seventh means for selecting a process; and when allocating the information obtained by this seventh means to each process on the scheduled operating date obtained by the third means, An eighth means of creating a processing process plan that allocates parts within the operating hours of the day obtained by the third method above, starting from parts with fewer factory operating days, that is, fewer spare days, until the latest start date, and post-processing of the allocated ones. and a ninth means for storing the information as if it is possible to start if the conditions are met by the sixth means, and all products being manufactured in the entire factory are completed by the respective manufacturing completion instruction dates. A processing process planning method for individual production that is characterized by creating a processing process plan that aims to achieve the following.