JPH04176545A - Production planning device - Google Patents

Abstract

PURPOSE:To continue an efficient production based on a program at all times by preparing in a short time the order starting a job within the period preparing a new production program, with the equipment operation state of the whole production system and the progress state of the job being taken into consideration. CONSTITUTION:A decision means 2 of a jog starting order within a set term starts the process after receiving an in process information 7, equipment operation information 8 and a production program 9 from the other systems of a production control system, production process control system, etc., at a preset time, by a receiver means 1. First, a basic information 6, an in process information 7 and production program 9 are referred, and the joy scheduled to be processed at each equipment is selected within a preset term. Moreover, the equipment operation information 8 is referred, and a jog starting order 10 is decided with the delivery allowance of each job, the equipment operation state in the process where the processing is scheduled and the in process distribution state of the whole production system, etc., being taken into consideration from the selected jobs.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manufacturing planning device, and is particularly intended for medium-scale or large-scale production systems, and is capable of processing production plans for multi-product jobs given by a host system. The present invention relates to a manufacturing plan creation device that automatically creates a manufacturing plan.

[Conventional technology]

As shown in FIG. 2, a conventional manufacturing planning device includes a receiving means, a manufacturing planning means, and a transmitting means.

The receiving means receives in-process information and equipment operation information from the manufacturing process management system, and receives a production plan from the production management system. In addition, the manufacturing plan creation means refers to the received production plan and in-process progress information, takes into account the load at each work center, and processes all jobs targeted by the plan. Determine the start order for equipment and create a manufacturing plan.

Further, the transmitting means transmits the manufacturing plan to the manufacturing process control system.

[Problem to be solved by the invention]

The conventional manufacturing planning device described above has a drawback in that it is not easy to create a manufacturing plan in real time. Therefore, if a disturbance such as equipment failure occurs and production cannot be performed based on the previously created manufacturing plan, a new manufacturing plan can be created immediately and production can continue based on that manufacturing plan. The problem was that it was difficult. In particular, the larger the target production system, the longer the time required to create a manufacturing plan.
The above problem is significant. Additionally, in some cases, another equipment breaks down while a new manufacturing plan is being created, and by the time the manufacturing plan is created, the manufacturing plan no longer matches the actual situation.

To address this problem, currently, the starting order of jobs is often determined manually until a new manufacturing plan is created.

Conventionally, in order to obtain a manufacturing plan in a short time, a method has been proposed in which the dispatch order is used to determine the order in which jobs are submitted and the order in which jobs are started in the middle of the process (for example, Yutaka Nakamura et al.: FMS scheduling using rule expressions considering delivery dates, 1st Intelligent FA Symposium Proceedings, July 1987)
.

However, dispatching rules are aimed at optimally sequencing jobs at local work centers. Therefore, although a good job start order can be obtained in local processes, there is a problem in that it is difficult to realize a start order that allows jobs to flow efficiently in the target production system as a whole.

In addition, as another approach, a method has been proposed in which the order of job input is determined in real time while monitoring the line status within the production system (for example, Minoru Yoshii et al.: FMS Scheduling Expert System, 19
(See 1989 National Conference of the Japanese Society for Artificial Intelligence, pages 605-608).

However, when targeting a medium-sized or larger production system with more than 50 processes, in order to achieve efficient production, it is necessary to carefully monitor not only the input order but also the intermediate processes. This method has its limitations, as it is necessary to decide on a starting order that can control the flow.

[Means to solve the problem]

The manufacturing plan creation device of the present invention includes a receiving means for receiving in-process information, equipment operating information, and a production plan, and basic information including product information and process information, and reference to the in-process information, equipment operating information, and production plan. job start order determining means within a set period for determining the start order of jobs to be processed at each facility for a preset period based on the load in the process and the progress of the job; job start order transmitting means for transmitting the start order of the job determined by the order determining means; the start order of the job determined by the job start order determining means within the set period, the basic information, and the in-process information/equipment; It is configured to include a manufacturing plan calculating means for calculating a manufacturing plan by performing a simulation within the plan creation target period with reference to the operation information and the production plan, and a manufacturing plan transmitting means for transmitting the manufacturing plan.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Basic information 6 including product information and process information regarding the target production system is registered in advance.

First, in the receiving means 1, in-process information 7. Equipment operation information 8 and production plan 9 are received.

Next, in the job start order determining means 2 within the set period,
Basic information 6. In-process information 7. With reference to the equipment operation information 8 and the production plan 9, a job start order 10 to be processed at each equipment for a preset period is determined from the load in the process and the progress of the job. Then, the job start order transmitting means 3 transmits the created job start order 10 to another system such as a manufacturing process management system.

Furthermore, in the manufacturing plan calculation means 4, job start order 1
0 and basic information 6. In-process information 7. With reference to the equipment operation information 8 and the production plan 9, simulations are performed for all target jobs, taking into account the load balance at each work center within the planning target period, and the equipment where each job is scheduled to be processed is determined. A starting order is created and a manufacturing plan 11 is calculated.

The manufacturing plan transmitting means 5 then transmits the manufacturing plan 11 to another system such as a manufacturing process management system.

3 and 4 are explanatory diagrams of product information and process information included in the basic information 6, respectively. The product information shown in Figure 3 includes the number of processes required to produce each type,
Information such as processing time and setup change time in each step is described in accordance with the order of the process steps. Also, the fourth
The process information shown in the figure includes information such as the name of the work center that can be used in each process, the number and name of equipment, the operating time of each equipment, and the name of the product types that can be processed by each equipment.

5, 6, and 7 show in-process information 7.0 received from other systems, respectively. 7 is an explanatory diagram of equipment operation information 8 and production plan 9. FIG. The in-process information 7 shown in Figure 5 includes the names of jobs in progress in the production system, the product type of each job, quantity, delivery date, priority, priority range 2, equipment name currently in progress, and If the work-in-progress status is that the equipment is processing, information such as the remaining work time for the equipment is described. Furthermore, the equipment operating information shown in FIG. 6 describes information such as the operating status of equipment at each work center and the expected recovery time of equipment that is out of order. Furthermore, the production plan 9 shown in FIG. 7 includes information such as job names for which production is instructed, product types, quantities, input dies, delivery dates, priorities, and priority ranges for each job. There is.

Next, the job starting order determining means 2 within the set period will be explained in detail.

The job starting order determining unit 2 within a set period receives work-in-process information 7 from other systems such as a production management system or a manufacturing process management system at a predetermined time by the receiving unit 1. Processing is started after receiving equipment operation information 8 and production plan 9. Alternatively, when an unexpected disturbance such as equipment failure occurs, the receiving means 1 receives the in-process information 7 from other systems such as the manufacturing process control system.
After receiving the information 8 and the equipment operation information 8, the process starts.

In this case, the production planning 9 uses previously received data.

First, basic information 6. With reference to the in-process information 7 and the production plan 9, jobs scheduled to be processed at each facility within a preset period are selected. As the set period, for example, a value of time required for the manufacturing plan creating means 4 to create a manufacturing plan is set in advance. Furthermore, the equipment operation information 8 is referred to, and jobs are selected from among the selected jobs by taking into consideration the delivery margin of each job, the equipment operation status in the process scheduled to be processed, and the work-in-process distribution status of the entire production system. Determine starting order 1o. Here, the delivery margin of a job refers to the ratio of the total remaining processing time up to the final process to the time from the current time to the delivery date. In short, the greater the delivery margin, the less margin there is for the delivery date.

FIG. 8 is an explanatory diagram of the job starting order determining means 2 within a set period. Job 91. In job 92 and job 93, the margin of delivery date is calculated. Further, the process currently in progress and the process scheduled to be processed within the set period are determined. Here, in the in-process process and the process steps after the in-process process, process 91 surrounded by a - heavy frame
．． The equipment in steps 92, 93, and 96 is shown to be in operation. Also, process 9 surrounded by a double frame
4 and Step 95 indicate that all or some of the equipment in the work center is out of order and stopped.

Jobs 91 and 93 are difficult if we only look at the margin for delivery, but since the equipment for process 94 or 95 is stopped, even if process 1 is started early, jobs 94 or 93 will be delayed. There is a high possibility that the process will be in a waiting state before 95. Therefore, the job 92 that does not pass through the failed equipment is given the highest priority within the set period.

Next, two steps up to step 92 can be processed, and in step 95, one equipment gives the job 91 in operation the second highest priority. Rules for determining the job start order 10 are registered in advance in a form suitable for the target production system.

FIG. 9 is an explanatory diagram of job starting order 10.

In the job start order 10, information such as a job name, the product type name, quantity, priority, and priority range of the job is described. The priority of this job is the priority of the job determined by the job start order determining means 2 within the set period, and the larger the value, the higher the priority. In other words, it starts early. Furthermore, the priority range indicates the range of processes for which the priority of the job is valid, and the final process of the process group that is scheduled to be processed within the set period is set.

The created job start order 10 is transmitted to other systems such as a manufacturing process management system by the job start order transmitting means 3. Within the production system, production is performed according to the starting order 10 instead of the previously created manufacturing plan.

In the manufacturing plan creation means 4, after the processing of the job start order determining means 2 within the set period is completed, the basic information 6. In-process information 7. Equipment operation information 8. A manufacturing plan 11 is created with reference to a production plan 9 and a job start order 10 using an event-driven simulator. In the simulation, work-in-progress information 7 and production plan 9 are developed along the time axis, and work start times and work end times are calculated for all target jobs at all facilities where each job is processed within the planning period. Calculate. In addition, we consider the load balance of equipment and the number of products to be processed, and decide on strategies such as the input order, the ratio of jobs to equipment, and the order in which dispatching rules are applied at work centers.Based on these strategies, The calculations are done through simulation. At this time, within the set period, the priority of the job described in job start order 10 is as follows:
A manufacturing plan 11 that does not disturb the job start order 10 is calculated by simulating the priority set higher than the priority of jobs not described in the job start order 10.

FIG. 10 is an explanatory diagram of the manufacturing plan 11. For each job, all processes to be processed within the planning period, work start time and work end time for all equipment are described.

If a disturbance such as another equipment failure occurs while creating the manufacturing plan 11, the process of the manufacturing plan creating means 4 is interrupted and the process is restarted from the transmission procedure 1.

In-process information 7 in this embodiment. The other party's system that receives the equipment operation information 8 and the production plan 9, or the other party's system that sends the job start order 10 and the manufacturing plan 11, is configured with hardware different from the manufacturing plan creation device of the present invention. Alternatively, they may be configured with the same hardware. If they are configured with the same hardware, the receiving means and the transmitting means of the embodiment serve as communication between programs.

〔Effect of the invention〕

The manufacturing planning device of the present invention is capable of changing the start order of jobs described in the manufacturing plan when an unexpected disturbance such as equipment failure occurs during production based on a previously created manufacturing plan. If production cannot continue based on the start time, the order in which jobs are started can be changed in a short period of time to create a new manufacturing plan, taking into consideration the equipment operating status of the entire production system and job progress. It can be created with . Therefore, there is an effect that efficient production based on a plan can be continuously realized.

Furthermore, the order in which jobs are started within the period for creating a new manufacturing plan is consistent with the order in which jobs are started in the newly created manufacturing plan, which improves reliability across the entire production system. It has the advantage of being able to create highly accurate manufacturing plans.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of an embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a conventional manufacturing planning device, Figure 3 is an explanatory diagram of product information, and Figure 4 is process information. 5 is an explanatory diagram of in-process information, Fig. 6 is an explanatory diagram of equipment operation information, Fig. 7 is an explanatory diagram of production planning, and Fig. 8 is an explanatory diagram of job start order determining means within a set period. FIG. 9 is an explanatory diagram of the job start order, and FIG. 10 is an explanatory diagram of the manufacturing plan. 1... Receiving means, 2... Job starting order determining means within a set period, 3... Job starting order transmitting means, 4... Manufacturing plan calculating means , 5...
...Manufacturing plan transmission means, 6...Basic information, 7
...In-progress information, death...Equipment operation information, 9
...Production plan, 10...Job start order, 11...Manufacturing plan. Agent Patent Attorney Susumu Uchihara No. 7 Figure 6 σgu grade

Claims (1)

[Claims] Receiving means for receiving in-process information, equipment operation information, and production plan; basic information including product information and process information;
Determine the starting order of jobs within a set period, which determines the starting order of jobs to be processed at each facility for a preset period based on the load in the process and job progress by referring to equipment operation information and production plans. means, a job start order transmitting means for transmitting the start order of the job determined by the job start order determining means within the set period; and a start order of the job determined by the job start order within the set period determining means. manufacturing plan calculating means for calculating a manufacturing plan by performing a simulation within a plan creation target period by referring to the basic information and the in-process information, equipment operation information, and production plan; and manufacturing plan transmitting means for transmitting the manufacturing plan. A manufacturing planning device comprising: