JP2000322119A - Substitutive lot determination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a system for providing information concerned in the progress of lot production and providing information to be a reference for judging whether another intermediate product can be substituted or not. SOLUTION: A registration means 2 registers the start/completion result of work obtained from each production process 1 in each lot. A totalization means 4 totalizes lot progress states on the basis of the start/completion result. A display means 5 displays which production process has been completed or is in working on the basis of the totalization data totalized by the means 4 and displays also order information such as the date of delivery and priority. When a change in specifications is generated, a production management section 30 retrieves a lot in working by another order of low priority from the displayed contents of the means 5 and selects a substitutive lot candidate. A specification change availability checking means 7 checks whether the selected substitutive lot can be substituted or not. Consequently the section 30 can easily know which low can be substituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to production management,
In particular, the present invention relates to an alternative lot determination system that provides information useful for quickly determining an alternative lot to change a production process.

[0002]

2. Description of the Related Art In recent years, with the rapid progress of electronic device component development technology using semiconductor wafers, each semiconductor wafer processor is required to have new product specifications every day. For this reason, changes in product specifications and process changes due to emergency orders and the like frequently occur.

In order to continuously secure orders from clients, each semiconductor wafer processor wants to respond flexibly to changes in specifications and promptly respond to clients with delivery dates in response to specification change requests. thinking.

Now, if the specification is changed after the start of production,
The production management department must consider whether reprocessing or transfer from another lot can be performed, and then respond to the client with a delivery date. At this time, since it is technically difficult to change the specifications by reworking, in most cases, it is necessary to grasp the status of other lots being processed that can be transferred.

[0005] For example, JP-A-1-121155 discloses a production scheduling apparatus. The production scheduling device described here is a production scheduling device that can simulate a production schedule. When the operator changes the production schedule, a simulation is performed on the changed production schedule, and the result is displayed. Therefore, the above publication describes that the operator can efficiently construct the production schedule.

[0006] However, even with the use of the production scheduling apparatus described in the publication, there is still a situation in which the operator must grasp the situation of another lot being processed which can be transferred.

Japanese Patent Application Laid-Open No. Hei 4-233069 discloses a scheduling method when a process is changed.
The process change scheduling method described here is a rescheduling method performed when the process of the work order changes. This method is characterized in that process information is provided for each work order in addition to the master process information for each product type, and the process information for each work order is changed and rescheduled at the time of reproduction processing, division, and merging.

Here, the work order is an order developed for each process after the production order is divided into lots. As described above, since the process information for each work order is provided in addition to the process information of the master for each product type, rescheduling is dynamically performed in response to a change in the work order due to reproduction, division, and merging. It is stated that it can be done. This makes it possible to automatically create work scheduling without manual intervention.

[0009] However, even if the process change scheduling method described in the same publication is used, there still exists a situation in which the operator needs to grasp the situation of another lot being processed which can be transferred. .

Further, Japanese Patent Application Laid-Open No. 9-153090 discloses a method and an apparatus for preparing a machining process production plan for quickly preparing a machining process production plan capable of responding to an order change while ensuring production efficiency. . In order to cope with order fluctuations, it is desirable to rebuild a production plan that incorporates the fluctuations while preserving the previously established production plan as much as possible.

[0011] In the processing step, the steps such as parts processing are complicated and various operations (construction methods) are often performed. For example, the optimum lot size and yield may differ depending on the work, such as when one part becomes another kind of part (the product number changes) after the work. For this reason, it is necessary to efficiently respond to order fluctuations while taking these factors into account and conversely utilizing them. Furthermore, it is difficult to make a plan at high speed using an optimization method, and a simulation method that simulates a product manufacturing process is suitable. However, in this case, it is difficult to improve the evaluation reference value along the time axis on each facility, such as reducing the number of product changes.

Therefore, in the invention described in the same publication, a production order is created by assigning the order, the finished product inventory, and the production plan before the change. by this,
After allocating the finished product inventory to the order, add the process of allocating the last planned production plan (before order fluctuation) to the remaining orders by using information such as product number, quantity, and delivery date. Is also used in new production plans.

At the time when the previous production plan was created, there is a correspondence between the production order and the individual data of the production plan, but this correspondence is ignored. Here, the assigned production plans and the production orders corresponding to them are left as they are in the new production plan, and the others are deleted. Then, a new production order is additionally created for the unassigned order.

By doing so, the previously created production plan can be utilized as a part of a new production plan.
The gazette states that changes in the production plan can be made small.

[0015] However, even if the production plan change method can be made small by using the production process planning method and apparatus described in the same publication, other lots being processed that can be transferred are processed. However, there still exists a situation that the operator needs to grasp the situation.

Japanese Unexamined Patent Application Publication No. 11-25181 discloses a method of developing a material required. The material requirement development method described here is a method that expands the material requirement amount taking into account changes in the item arrangement method such as shortening the lead time, changing the appropriate stock amount / unit arrangement amount, reviewing the item management method, etc. is there.

The conventional material requirement development method is based on the assumption that the method of arranging items is constant and that there is no change. Difficult to reflect in. In addition, if you change the way you manage your items, you will need to determine in advance how this change will affect your material requirements deployment results.
It is difficult to evaluate at the planning stage.

Therefore, in the invention described in the same publication, the calculation is performed using the item information and the item generation information describing the changed information of the item whose arrangement method changes. For this calculation, the invention of the above publication includes a parts list construction unit that creates a parts list for MRP calculation, a plan reading unit that inputs final product / part production plan, and fixed required / fixed order information, An MRP calculation unit that searches generation information corresponding to the processing target plan from the table and the production plan, performs required development from the item generation information, and generates an order, and a file output unit that outputs the output of the MRP calculation unit to a file. Have. Further, the present invention includes an MRP result display section for displaying a required plan and an arrangement plan as a result of material required development.

Therefore, in the invention described in the same publication, at the time of processing each requirement, item (generation) information to be applied is searched based on the required date, and then the searched item (generation) is searched. ) Time series inventory calculations can be performed using the information. As a result, when it is determined that an order needs to be generated, an order date and an order amount are calculated to generate an order. As described above, if the management method of an item is desired to be changed at a certain point in time, it is described in the same publication that an order that reflects the change can be generated.

According to the publication, even if the management method of a product is changed, it is possible to generate an order that appropriately reflects the change.

[0021] However, even if the material required development method described in the same publication is used, an arrangement order reflecting a change in the management method can be created, but in order to determine the change, transfer is possible. The situation that the operator must eventually ascertain the situation of other lots being processed has not been solved.

[0022]

As described above, in the prior art, since the processing schedule of each process is adjusted in consideration of the operating efficiency on the processing line side, all processes on the production management side are adjusted. There is a problem that it is difficult to grasp the status of the lot until the lot is completed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to realize a system which provides a production management side with information on the progress of production of product stocks and intermediate process lots in response to fluctuations in demand. It is to be. Also,
An object of the present invention is to provide a system for providing information in real time to a production management side as a reference for determining whether a product manufactured in another order or an intermediate product being processed can be transferred according to the priority of demand. It is to realize.

[0024]

According to a first aspect of the present invention, there is provided an alternative lot determination system for determining an alternative lot in a production system that performs production management based on a lot number. A registration means for registering the start and completion results of the process work in each production process, and a lot progress based on the start and completion results of the process work registered in the registration means. A totaling means for totalizing the status, a display means for displaying the progress status of production for each lot based on the totalized data obtained by the totaling means, and displaying order information; and a product specification master storing manufacturing standard information. A specification change for determining whether or not a given lot can be transferred based on manufacturing standard information stored in the product specification master. It is constituted including a capability check means.

According to such a configuration, since it is possible to know whether or not the lot can be transferred, the user can easily reschedule.

According to a second aspect of the present invention, in the alternative lot determination system, the registration unit includes a terminal unit for registering the start and completion results of the process work by manual input by an operator in each of the production processes. According to such a configuration, the start and completion results of the process work can be registered in the registration means even on a line where various machine tools are not used.

According to a third aspect of the present invention, in the alternative lot determining system, the registering means includes means for taking in the start and completion results of the process work from the control system of the processing machine in each of the production processes. According to such a configuration, since the start and completion results of the process work can be directly taken in from the control system of various processing machines, the amount of human work is reduced.

According to a fourth aspect of the present invention, in the alternative lot determining system, the progress status displayed by the display means includes information on a process completed for each lot or a process being processed. According to such a configuration, the start and completion results of the process work can be known for each lot, so that the user can easily determine the lot transfer.

According to a fifth aspect of the present invention, in the alternative lot determination system, the order information displayed by the display means includes a delivery date. According to such a configuration,
The user can judge the transfer of the lot in consideration of the delivery date.

According to a sixth aspect of the present invention, in the alternative lot determination system, the order information displayed by the display means includes a priority. According to such a configuration, the user can determine the lot transfer in consideration of the priority.

According to a seventh aspect of the present invention, there is provided an alternative lot determining system, wherein the specification change availability check means also determines whether or not a change in the contents of the production process is necessary for the transfer. According to such a configuration, it is possible to know whether or not the lot can be transferred and the user can also know whether or not the production process contents need to be changed as a result of the transfer. Can be.

An alternative lot determination system according to claim 8 is configured to include an instruction creating means for creating an instruction for transferring a given alternative lot to a new order. According to such a configuration, since the lot transfer instruction is automatically created, the lot transfer operation can be performed smoothly.

According to a ninth aspect of the present invention, there is provided an alternative lot determining system which changes original order information of a designated alternative lot based on an instruction created by the instruction creating means, and newly creates a production schedule. Is included. According to such a configuration, a production schedule newly generated by the transfer of the lot can be automatically created, and the lot transfer operation can be performed smoothly.

According to a tenth aspect of the present invention, in the alternative lot determination system, when the specification change availability check means determines that the contents of the production process need to be changed for transfer, a rework instruction is created. Means. According to such a configuration, it is possible to automatically create a rework instruction reflecting the change in the content of the production process caused by the lot transfer, and it is possible to perform the lot transfer operation more smoothly.

[0035] In the alternative lot determination system according to the eleventh aspect, the change of the content of the production process includes rework, process change,
The configuration includes any one of the change of the processing work content. According to such a configuration, it is possible to automatically create a rework instruction reflecting the rework, process change, and change of the work content caused by the transfer of the lot, and to perform the lot transfer operation more smoothly. It is possible.

According to a twelfth aspect of the present invention, in the alternative lot determination system, the rework instruction creating unit recreates the original lot work instruction lost by the transfer. According to such a configuration, the work instruction sheet of the original lot before the transfer can be automatically re-created by the transfer of the lot, and the lot transfer operation can be performed more smoothly.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The production management system according to the present embodiment grasps the progress of production of a product inventory and an intermediate process lot in response to fluctuations in demand, and provides information on the progress.

Further, the production management system of the present embodiment
It provides, in real time, information serving as a criterion for determining whether a product manufactured in another order or an intermediate product being processed can be transferred according to the priority of demand.

According to such a production management system, the production management department can obtain useful information, and as a result, can quickly determine a rework schedule for an alternative lot. Therefore, the production management department can promptly reply to the orderer with the delivery date.

The production progress system of the present invention is characterized in that the same lot number is consistently assigned to each of the raw material, the intermediate product, and the product to manage the progress. And when specification change occurs due to emergency order etc.
The production management department uses the information provided by this system to
It is possible to search for a lot of a low-priority order that can be replaced, and select a replacement lot candidate.

Further, the present system checks the condition as to whether or not the lot can be used as a substitute, and responds to the production management department. As a result, the production management department can transfer the order of the substitute lot based on the information.

Further, the present system automatically issues a rework instruction if rework is necessary, based on an instruction from the production management department. The production schedule is determined when this rework instruction is issued. Therefore, the production management department can promptly reply to the orderer's urgent order or the like with the delivery date.

FIG. 1 is a block diagram showing the configuration of an alternative lot determination system according to the present embodiment. As shown in FIG. 1, the alternative lot determination system 100 according to the present embodiment first includes a registration unit 2 and a totalization unit 4.
, Display means 5 and a display 20.

The registration means 2 is a means for registering the start and completion of work from each production process 1 for each lot.
The start and completion results of these operations are stored in the registration means 2. Note that the production process 1 includes all lines such as a processing line and an inspection line.

This registration work may be performed by the operator from each production process 1 by manual input to the terminal. further,
Registration means 2 from the control system of the processing machine in each production process 1
May directly take in work start and completion results. The timing for registering the work start and completion results may be when the respective production processes 1 are started (started) or when they are completed (finished). In any case, since there are a plurality of production processes 1 and a plurality of lots, the registration operation itself is performed at random.

The totalizing means 4 totalizes the lot progress based on the start and completion of the work of each process registered in the registering means 2.

The display means 5 displays which production process is completed or in process for each lot based on the totalized data obtained by the totaling means 4, and also displays order information such as delivery date and priority. I do. Specifically, the display is performed by displaying the progress of each lot on the screen of the display 20. In addition, order information such as delivery date and priority is also displayed on the screen of the display 20.

When a specification change due to an emergency order or the like occurs, the production management section 30 searches the display of the display means 5 for a lot being processed in another order having a low priority, and selects an alternative lot candidate. Here, the production management section 30 means a user who uses the present system.

After selecting some alternative lot candidates, the production management section 30 activates the specification change availability checking means 7 and checks whether or not the candidates can be replaced. The specification change availability check unit 7 acquires the manufacturing standard information of the specification change target from the product specification master 6 and determines whether transfer is possible. Also, it is determined whether reprocessing, process change, processing work content change, etc. are necessary for the transfer.

The product specification master 6 stores information on all the standards that can be manufactured, and based on this information, the specification change availability checking means 7 switches to another standard by rework, process change, or the like. You can determine if you can. The result of the determination by the specification change availability check means 7 is displayed on the display 20.

The production management section 30 determines an alternative lot on the basis of the result of the judgment made by the specification change checking means 7 displayed on the display 20. Production management department 30
Inputs the determined alternative lot to the specification change instruction creating means 8. Then, the specification change instruction creating means 8 creates an instruction for transferring the determined alternative lot to a new order,
Further, the specification change information is transmitted to the order transfer means 9. Note that the specification change information is stored in the rework instruction
Is also transmitted to

At this time, if the reworking, the process change, and the contents of the working work are necessary, the reworking instruction creating means 10 creates the reworking instruction. Whether or not reworking, process change, and processing work contents are necessary is checked whether specification change is possible or not.
The rework instruction creating unit 10 can know this by referring to the judgment of (1). The rework instruction creating means 10 recreates the original lot work instruction lost by the transfer.

The order transfer means 9 changes the original order information of the lot designated as the substitute lot and creates a new production schedule. Here, the original order information of the lot designated as the substitute lot is stored in the display means 5. This information is stored in the display means 5 because, as described above, the display means 5 must also display order information such as delivery date and priority. Further, the order transfer means 9 similarly registers the created new order in the display means 5.

As described above, according to the present embodiment,
Since it is automatically determined whether the lot can be used as a substitute, the user can easily select a substitute lot and can easily perform rescheduling. In addition, it is possible to smoothly and quickly perform the work of transferring the order of the substitute lot and issuing the rework instruction.

[0055]

As described above, according to the present invention, the production management system responds to fluctuations in demand, grasps the production progress of product stocks and intermediate process lots, and manufactures products in different orders according to the priority of demand. Since it is possible to provide in real time information as to whether or not the finished product or the intermediate product being processed can be transferred, the production management department 30 can immediately determine the rework schedule using the alternative lot and promptly respond to the delivery date. It is possible to do.

In addition, the present system checks and replies to the conditions as to whether the lot can be replaced or not.
It is possible to smoothly and promptly perform the work of transferring the order of the substitute lot and issuing the rework instruction.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of an alternative lot determination system according to a preferred embodiment of the present invention.

[Explanation of symbols]

 1 Each production process 2 Registration means 4 Totaling means 5 Display means 6 Product specification master 7 Specification changeability checking means 8 Specification change instruction creation means 9 Order transfer means 10 Rework instruction creation means 20 Display 30 Production management department

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Claims (12)

[Claims] 1. An alternative lot determination system used to determine an alternative lot in a production system that performs production management based on a lot number, in which start and completion results of process work in each production process are registered. A registration unit, a totaling unit that totals the lot progress based on the start and completion results of the process work registered in the registration unit, and a production progress status for each lot based on the total data compiled by the totaling unit. Display means for displaying order information, a product specification master storing manufacturing standard information, and whether or not a given lot can be transferred is determined by the manufacturing specification information stored in the product specification master. An alternative lot determination system, comprising: a specification change availability check unit that determines based on the following. 2. The alternative lot determination according to claim 1, wherein said registration means includes a terminal means for registering the start and completion results of the process work by manual input by a worker in each of said production processes. system. 3. The alternative lot determination system according to claim 1, wherein said registration means includes means for taking in the start and completion results of the process work from the control system of the processing machine in each of said production processes. 4. The progress status displayed by the display means includes:
2. The alternative lot determination system according to claim 1, wherein information on a process completed for each lot or a process being processed is included. 5. The alternative lot determination system according to claim 1, wherein the order information displayed by said display means includes a delivery date. 6. The alternative lot determination system according to claim 1, wherein the order information displayed by said display means includes a priority. 7. The alternative lot determination system according to claim 1, wherein said specification change availability check means also determines whether or not a change in the contents of the production process is necessary for the transfer. 8. An alternative lot determination system according to claim 1, further comprising: instruction creating means for creating an instruction for transferring a given alternative lot to a new order. 9. An order transfer means for changing original order information of a designated alternative lot based on an instruction created by said instruction creating means, and newly creating a manufacturing schedule. 8. The alternative lot determination system according to item 8. 10. A reworking instruction creating means for creating a reworking instruction when the specification change availability checking means determines that a change in production process contents is necessary for transfer. The alternative lot determination system according to claim 7. 11. The alternative lot determination system according to claim 7, wherein the change in the content of the production process includes any of re-machining, a process change, and a change in a process operation. 12. The alternative lot determination system according to claim 10, wherein the rework instruction creating unit recreates the work instruction of the original lot lost by the transfer.