JPH05290053A - Providing method for flowing information in production management system of small scale many kinds - Google Patents

Abstract

PURPOSE:To provide information showing which lot is to preferentially be produced for manufacturing a semiconductor element by means of the production system of small scale many kinds. CONSTITUTION:A work plan 1 obtained by collecting information when the lot starting manufacture is to pass through respective processes is decided by considering the capacity of a manufacture process. A computer screen is used for deciding which work of the lot is to be proceeded among the elements which are not started yet by using a line and a manufacture equipment, which are not operated, as to the unstarted elements existing in a certain work process. Namely, efficient flowing information 3 is provided based on difference information 4 between a work plan master 1 and the progress advance degree of actual lot 2. Thus, a worker can instantaneously decide the lot and the manufacture equipment, with which the lot is proceeded by plan difference information 4 and work priority ranking information 5. Consequently, the system is a presently efficient method with which the production system of small scale many kinds is executed, and it is considerably efficient in a manufacture scene.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to production management at a manufacturing site, and is particularly suitable for a method of providing flow-through information which is essential for efficient production.

[0002]

2. Description of the Related Art In the recent semiconductor industry, in addition to a mass production system, a multi-product small-quantity production system is frequently used. In the latter, in a particular product, in which line, in which machine, in which order. Make a process plan for production,
It is generally executed. However, in the field, troubles of lines and manufacturing equipments, jump-in work, and interruption work occur, so that it is usual that the process plan must be changed.

In such a case, it should be said that it should be sent based on the difference information between the progress status at that time and the process plan, but in the progress management of the manufacturing process by the conventional batch processing, which product is which process It was not in the area of inventory management to manage on a daily level.

[0004]

[Problems to be Solved by the Invention] Even if a product is not in the area of inventory management or it shows progress information, if a difference from the plan cannot be displayed at the same time, which lot (a batch of product shed) will be given priority to the line. There was a drawback that it was not possible to make a logical decision as to whether or not to proceed with the manufacturing equipment.

The present invention has been made in view of the above circumstances. In particular, when performing production in a lot type with a small lot of multiple types and in a lot form, it is more efficient to preferentially produce from which lot. The purpose is to provide information as to whether it is appropriate.

[0006]

SUMMARY OF THE INVENTION A first invention is to manufacture a process for obtaining progress information of unfinished products in each manufacturing process and a work plan master showing work plan time of each process for a product which has started manufacturing. And a step of calculating the difference time between the work plan time of the unfinished product and the work plan time based on the work plan master, and displaying the difference time.

A second aspect of the invention is a flow-through information in a high-mix low-volume production management system characterized by a step of performing a rank-based classification based on a time difference from the work plan time and a display step showing priority. Is a method of providing.

[0008]

The operation plan for when the lot in which the production is started should pass through each process is determined by considering the capability of the production process. When deciding which lot to proceed with for an empty line and manufacturing equipment for an unfinished product that is the target of this process, based on the difference information between the work plan and the work progress of the lot, the computer terminal The display can show the efficient shedding. That is, it can function as a decision support tool.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for providing flow information in a multi-product small-quantity production management system according to the present invention will be described with reference to FIGS.

Since a so-called high-mix low-volume production control system is often used in the recent manufacturing of semiconductor devices, various materials for semiconductor devices are put in parallel at the manufacturing site for production. At present, it is extremely important for workers how to match the work plan created with a fixed storage time and a fixed lead time.

With respect to the present invention considered in such a background, FIG. 1 shows an outline of the idea of the present invention. In other words, the work plan master 1 includes the work-in-progress progress information 2 for each process and the flow-in decision-making support information 3, but the running date and time of each process of all lots (products) that started manufacturing are: The manufacturing lead time is determined in consideration of the allowance, and these are registered in the computer in consideration of the work plan of the jump and interruption lot according to the required level.

The unprocessed product progress information 2 of each process takes into consideration the time information that the target process shows the current actual status of the unprocessed product, and the plan difference information 4 and the work. It targets the priority ranking information 5 and indicates the difference time from the current time with the work plan master information (time). It is highly accurate for the work plan master when the work is started from which lot. This is information that supports the progress.

Among the flow decision support information 3, the work priority ranking information 5 ranks the difference time according to a certain standard, and any worker can intuitively determine the lot priority level to be flowed. There is also a method of color-coding each rank.

Table 1 below shows an example of specific information disclosure in a computer terminal.

[0015]

[Table 1] As is clear from Table 1, the plan difference information 4 displayed on the computer display clearly shows the difference from the time determined by the work plan master 1, and accordingly, the work priority ranking information 5 shows the work plan master. The one with a large difference from 1 is set as a large number, and the lot is prioritized for the work.

[0016]

As described above, according to the present invention, it is possible to move away from the level of the process inventory control which has been conventionally performed as the production control, and to proceed as planned to the lots whose work is delayed due to the situation of the line and equipment at the site. Information is provided to a worker at each production point using a computer terminal as a medium to enable efficient shedding. Moreover, it is an effective means for high-mix low-volume production.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of an idea of the present invention.

[Explanation of symbols]

 1: Work plan master, 2: Process in-process work progress information, 3: Flow decision support information, 4: Plan difference information, 5: Work priority ranking information.

Claims (2)

[Claims] 1. A process for obtaining progress information of an unfinished product in each manufacturing process, a process for producing a work plan master showing a work plan time of each process for a product that has started manufacturing, and the work plan master. A method of providing flow information in a high-mix low-volume production management system, characterized by comprising a step of calculating and displaying a difference time from the work-scheduled time of the unfinished product based on 2. Flowing information in a high-mix low-volume production management system, characterized by comprising a step of ranking by a reference time based on a time difference from the work plan time and a display step showing a priority order. How to provide