JPH02172659A - Control method for lot - Google Patents

Abstract

PURPOSE:To drastically reduce the man/hour of a tracing work in a quality control aspect by preparing an interlot relation storing file according to a product progressing the manufacturing process, watching an optional lot and forming a structure of retrieving all of lots before and after related to the lot. CONSTITUTION:At the time when a changed lot structure is changed again at the post-stage, an interlot relation storing file 1 making an optional lot number and the rear lot number related to the optional lot as a 2nd information item, an interlot relation storing file preparing part 2 preparing it according to a product progressing the manufacturing process and a lot retrieving part 3 retrieving all of the lots before and after related to the lot by watching an optical lot are equipped with. The rear lot on which the optional lot is effecting can be known by adding the rear lot number table related in addition to the front lot number table related into the interlot relation storing file 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a manufacturing control unit, that is, a lot management method in a manufacturing process for manufacturing products, and in particular to a lot history in a manufacturing process in which lot division or lot integration is repeated multiple times. Regarding management.

[Conventional technology]

In recent years, the number of processes involved in product manufacturing has increased significantly.
And many of them are manufactured through complicated routes. In addition, there are many different types of equipment involved in their manufacturing, and the number of products that can be manufactured under the same manufacturing conditions, that is, the size of equipment production lot, usually differs depending on the equipment. In such cases, the lots formed in the initial manufacturing process are repeatedly divided into lots and integrated as the manufacturing process progresses, and the final product has a history of extremely diverse equipment manufacturing lot combinations. A computer-based management system has been introduced for management.

Conventionally, in this type of lot management system, when lots are divided or integrated during an intermediate process, that is, when the lot structure changes, only the lot number immediately before the change in structure is stored and saved as related lot information. For example, in Figure 2, if the lot with lot number al and the lot with lot number a2 are integrated to form a new lot and become lot number a6, the related lot of the lot with lot number a6 is the previous lot. Only al and a2 were stored, and if the configuration of a6 was changed in a subsequent process, no information regarding subsequent related lots was stored.

[Problem to be solved by the invention]

In the conventional lot management method described above, when focusing on a certain lot, the lot number from which the configuration was originally stored is stored, so the history of previous lots can be traced. The disadvantage was that it was not possible to trace changes in the lot composition. This drawback has become a serious drawback, especially in terms of quality control, as it is impossible to know which product lot in the subsequent process is affected by a lot defect in an intermediate process.

[Means to solve the problem]

In the lot management method of the present invention, when the lot composition changes during the product manufacturing process, the own lot number and the previous lot number related to the own lot are used as the first information items, and the changed lot composition is reused in the subsequent process. When the product changes, create an inter-lot relationship storage file with the own lot number and subsequent lot number related to the own lot as second information items, and the inter-lot relationship storage file as the product progresses through the manufacturing process. The system includes an inter-lot relationship storage file creation section, and a lot search section that focuses on an arbitrary lot and searches for all the lots before and after the lot.

〔Example〕

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

FIG. 1 shows one embodiment of the invention. In Figure 1,
This embodiment is a management method for manufacturing control units (lots) in the manufacturing process of manufacturing products, and the lot-to-lot relationship storage file 1. Inter-lot relationship storage file creation section 2 and lot search section 3
It consists of:

FIG. 2 shows an example of visualizing changes in lot composition. In FIG. 2, this embodiment shows the division and integration of lots in the manufacturing process. For example, a lot with lot number a6 is configured by integrating lot numbers a1 and lot numbers a2, and in a later process, lot numbers a9 and ato are formed by integrating lot numbers a1 and a2. Lots are managed by dividing them into atts, and in order to make the explanation easier to understand, the following explanation will be given using lot numbers al to al5.

FIG. 3 shows an example of the structure of the inter-lot relationship storage file 1 shown in FIG. 1. In FIG. Lot number 32 corresponding to the record. Multiple previous lot number tables 33 to which the lot is related. and a related post-lot number table 34, and is a file of an example of lot division/integration shown in FIG. Taking the aforementioned lot number a6 as an example, information is stored in the sixth record of record number 31, and the related previous lot number table 33 has lot number al
and a2 are stored. Further, the related subsequent lot number table 34 stores lot numbers a9, alo, and a1□. All the information shown in FIG. 3 is created by the inter-lot relationship storage file creation section 2 shown in FIG.

Next, the operation of the lot search section 3 shown in FIG. 1 will be explained using FIG. 4. Have workers or managers select notable lot numbers where abnormalities have been detected in terms of quality control, etc.
Box 41). Here, the explanation will be given assuming that lot number a6 is selected. Furthermore, the operator or manager is asked to declare whether he or she wants to focus on the preceding process or the subsequent process (box 42). When focusing on the subsequent process, there is no need for further searching and the process ends, but if there is a subsequent lot, all subsequent lot numbers are output (box 44). In this assumption, from the subsequent lot number table 34 related to a6 in FIG. 3 as the subsequent lot of a6 (
a9. ago, all) are output. Furthermore a9,
alo, all (box 45), then check whether there is a lot (box 43)
). In this assumption, (a151 is output. The subsequent lot for ass is also checked, and the process ends after confirming that there is no subsequent lot. In this assumption, as the subsequent lot related to lot number a6, (a9. ago, act, atq)
can be seen to be affected. When focusing on the previous process, first check whether there is a previous lot or not. Box 46) If there is no previous lot, no further search is necessary and the process ends, but if there is a previous lot, all previous lot numbers are output. (Box 47). In this assumption, (al 1 a2 ) is output from the previous lot table 33 related to a6 in FIG. 3 as the previous lot of a6. Furthermore a
1 and a2 (box 48), a check is made to see if there is a previous lot (box 46).

Since there is no previous cut for both al and a2, it can be seen that (a I T a2) has an influence as the previous lot related to lot number a6, assuming that the search ends here.

〔Effect of the invention〕

The lot management method of the present invention adds a related subsequent lot number table in addition to a related previous lot number table in the inter-lot relationship storage file. It is now possible to know which lots are having an influence on the subsequent lots, which has the effect of significantly reducing the number of man-hours involved in tracing work in terms of quality control.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows an example of visualizing lot division/integration.
The figure shows an example of the structure of the inter-lot relationship storage file.
The figure is a diagram showing an operation flowchart of the lot search section. DESCRIPTION OF SYMBOLS 1... Inter-lot relationship storage file, 2... Inter-lot relationship storage file creation unit, 3... Lot search unit, 31
...In order of record number, 32...In order of lot number, 33
. . . Related previous lot number table, 34 . . . Related subsequent lot number table.

Claims (1)

[Claims] When the lot composition changes in the product manufacturing process - The own lot number and the previous lot number related to the own lot are the first information items, and when the changed lot composition changes again in the subsequent process - The own lot number and an inter-lot relationship storage file in which a second lot number related to the own lot is used as a second information item, and an inter-lot relationship storage file creation unit that creates the inter-lot relationship storage file as the product progresses through the manufacturing process. , a lot search unit that focuses on an arbitrary lot and searches all the lots before and after that lot.