JPH0845805A - Production control system - Google Patents

Abstract

PURPOSE:To efficiently produce a lot of higher priority, by predicting a production completion date of the lot of higher priority from the processing time and the number of lots to be processed, and giving an alarm when it is judged that the production completion date of the lot of higher priority is later than a set delivery date. CONSTITUTION:A simulation execution part 10 has an internal clock. The simulation execution part 10 predicts a production completion date of a lot of higher priority through simulation from the processing time and the number of lots to be processed in consideration of device availability, waiting time and priority of the lots. An evaluation part 11 sends an alarm command when it determines that the start of processing at a present time point for a normal lot of lower priority will disturb the observance of the delivery date of the lot of higher priority. An operator, notified by an alarm given by an apparatus 3 on the production site, waits for arrival of the lot of higher priority and processes the lot of higher priority first.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production control device,
More specifically, it can be applied to production management technology that manages scheduling used in semiconductor manufacturing processes, etc. In particular, it minimizes adverse effects such as delivery times of low-priority ordinary lots while maintaining high priority. The present invention relates to a production management device capable of efficiently producing a lot by a fixed delivery date.

[0002] There are two stages at the manufacturing process site, where the lot priority is high and low. In recent years, in particular,
If there are lots of high priority lots, in order to efficiently produce high priority lots by a fixed delivery date while minimizing the influence on other low priority ordinary lots. There is a demand for a production control device capable of issuing the scheduling instruction of.

[0003]

2. Description of the Related Art Conventionally, in scheduling when there are a lot of lots with high priority, a skilled person can process lots of high priority that will arrive later by experience and intuition while looking at the current state. Prioritize and wait for the high-priority lot to arrive at the processing equipment, and wait for the low-priority ordinary lot until the high-priority lot is processed. are doing.

Conventionally, in the case of using a computer for work instructions, the order of lot processing can be determined by the priority at the start of processing, but since the priority is given to the lot, the priority of the lot is low. There is no instruction to keep a lot of the lot waiting without processing.

[0005]

However, in the conventional schedule by the operator as described above, the lot with the high priority is given priority, the processing of the ordinary lot with the low priority is stopped, and the lot with the high priority is stopped. Since priority is given to processing, the delivery date of the lot with high priority is emphasized,
Since the delivery date of the ordinary lot with low priority is not taken into consideration, there is a problem that the delivery date of the ordinary lot with low priority may be delayed.

Further, before the lot having the high priority arrives at the processing apparatus, the processing of the ordinary lot having the low priority is stopped and the processing apparatus is emptied and waits, so that the operation rate of the apparatus tends to decrease. There was a problem. Further, when the computer is used for the conventional work instruction as described above, the priority of the processing lot is simply determined by the priority at the start of the processing. Therefore, the priority is emphasized by the priority set at the start of the processing. However, in an ever-changing situation, it cannot be said that it is the optimal solution, and in order to prioritize lots with high priority,
Since there is no instruction to hold the low-priority lot without waiting, there is a problem that the high-priority lot may be delayed in delivery.

Therefore, depending on the urgency of the delivery date of the lot having a high priority, it is necessary to stop the processing of the ordinary lot having a low priority and give a special work instruction such as waiting for the lot having a high priority. It was troublesome. Therefore, the present invention provides a production management device capable of efficiently producing a high priority lot by a fixed delivery date while minimizing adverse effects such as delivery time of a low priority ordinary lot. With the goal.

[0008]

According to the first aspect of the present invention,
The delivery date information storage unit that stores the delivery date and priority of the input lot, the device information storage unit that stores the processing capacity information of the equipment on the manufacturing site, the allocation device of the process of the lot to be manufactured, the processing time and the setup time are stored. A product processing information storage unit, a processing progress information storage unit that stores the degree of progress of each lot under the current situation, and a worker information storage unit that stores the average worker waiting time at the time of processing and failure for each device. , A device state storage unit that issues a simulation instruction in a predetermined state while storing the state of the device in the current state, a data extraction function that automatically extracts the stored information from each device, and the stored information The simulation data editing unit that edits the simulation input data and the internal clock are held, and the processing time of the process and the number of lots to be processed determine the equipment processing capacity, waiting time, and priority of the lot. In consideration of the above, the simulation execution unit that simulates and predicts the product processing completion date of the higher priority lot and the product processing completion date of the higher priority lot that is simulated and predicted by the simulation execution unit are An evaluation unit that evaluates whether or not the set delivery date is exceeded, and an alarm means that issues an alarm when the evaluation unit determines that the product processing completion date of the higher priority lot exceeds the set delivery date. It is characterized by having.

[0009]

According to the present invention, the above problems are solved by using the stored information of the manufacturing site, which is edited and stored at any time, and performing a simulation at the following time point when a work instruction is required, which will be described later. Here, the following time points mean the time when there is no lot with a high priority in the device buffer and the worker starts the processing of a normal lot.

According to the present invention, after the simulation at this point is executed, the processing of the ordinary lot having the low priority described above arrives at the same device during the processing of the ordinary lot, and the delivery date of the lot having the high priority is reached. When it is determined from the simulation result that the process is a process that prevents compliance, an alarm instruction is sent to a device or the like at the manufacturing site to issue a warning from the device at the manufacturing site.

Therefore, depending on the presence or absence of the warning, the worker
It is possible to appropriately determine whether to start or stop the low-priority ordinary lot processing. Therefore, while minimizing the adverse effects such as the delivery time of ordinary lots with low priority,
High-priority lots can be efficiently produced by a fixed delivery date.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a production management apparatus according to an embodiment of the present invention. When inputting a lot into the manufacturing process, the worker registers the type of the input lot, the delivery date, and the high / low priority classification in the delivery date information storage unit 2 through the input terminal 1. In addition, from each device 3 at the manufacturing site, information regarding which lot the device is currently processing, or about to be processed, information about the number of devices, operation rate, product processing information, Information on the degree of progress, information on the average worker waiting time at the time of processing and failure etc. is extracted by the automatic data extraction function,
It is stored in each of the storage units 4 to 8.

Here, the device information storage unit 4 stores the number of devices at the manufacturing site and the operating rate of the devices, and the product processing information storage unit 5 stores the allocation device of the process of the lot to be manufactured, the processing time and the setup time. The process progress information storage unit 6 stores the progress degree of each lot in the current situation. The worker information storage unit 7 stores the average worker waiting time at the time of processing and failure for each device, and the device state storage unit 8 stores the state of the device in the current state and the determined state. To issue a simulation instruction.

Next, since the apparatus state storage section 8 keeps track of the apparatus state at any time, simulation instructions are given to the simulation data editing section 9 only when an ordinary lot process with a low priority is going to be performed. To send. After the device state storage unit 8 sends the simulation instruction to the simulation data editing unit 9, the simulation data editing unit 9 edits each storage information at the present time for the simulation input data. Next, the input data in which each stored information at the present time is edited by the simulation data editing unit 9 is used as it is in the simulation executing unit 10.

The simulation executing unit 10 holds an internal clock, and takes into consideration the device operating rate, waiting time for personnel, priority of lots, etc. from the processing time of the process and the number of lots to be processed, and performs simulation to give a high priority. Predict the completion date of product processing for one lot. In this way, the simulation executing unit 10 executes a simulation from that time point on the basis of each input data, predicts the product processing completion date of the lot with the higher priority, and sends the simulation result to the evaluation unit 11. .

In the evaluation unit 11, when a low-priority ordinary lot is processed at this stage, the product processing completion date of the high-priority lot that will arrive later during the processing of the lot and the priority level of the lot. The processing of a low ordinary lot is made to wait, and the product processing completion date of that lot when the lot arrives later and has a higher priority is performed first is compared. Then, when the evaluation unit 11 evaluates that the processing start of the low-priority ordinary lot at the present time is the processing that prevents the high-priority lot from complying with the delivery date, an alarm instruction is sent to the apparatus 3 at the manufacturing site.

Then, the operator interrupts the processing start of the ordinary lot having the low priority at the present time by an alarm generated from the apparatus 3 at the manufacturing site, waits for the arrival of the lot having the high priority, and gives priority to the lot. . As described above, in the present embodiment, after the simulation is executed by the simulation executing unit 10, the processing of an ordinary lot having a low priority is
When it is determined from the simulation result of the evaluation unit 11 that the process that prevents the delivery of the lot having a high priority that arrives at the same device during the processing of the ordinary lot is judged, the device 3 at the manufacturing site is used.
The device 3 at the manufacturing site issues a warning by sending an alarm instruction to.

Therefore, depending on whether or not there is a warning, the worker
It is possible to appropriately determine whether to start or stop the low-priority ordinary lot processing. Therefore, while minimizing the adverse effects such as the delivery time of ordinary lots with low priority,
High-priority lots can be efficiently produced by a fixed delivery date.

[0019]

According to the present invention, it is possible to efficiently produce a high-priority lot by a fixed delivery date while minimizing the adverse effects such as the delivery time of a low-priority ordinary lot. There is.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a production management apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 input terminal 2 delivery date information storage unit 3 device 4 device information storage unit 5 product processing information storage unit 6 processing progress information storage unit 7 worker information storage unit 8 device status storage unit 9 simulation data editing unit 10 simulation execution unit 11 evaluation unit

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Claims (1)

[Claims] Claims: 1. A delivery date information storage unit (2) for storing a delivery date and priority of an input lot, an apparatus information storage unit (4) for storing processing capacity information of an apparatus on a manufacturing site, and allocation of manufacturing lot processes. Product processing information storage unit (5) that stores the device, processing time, and setup time, processing progress information storage unit (6) that stores the degree of progress of each lot under the current situation, and processing time and failure of each device. A worker information storage section (7) for storing an average worker waiting time at a time, an apparatus state storage section (8) for issuing a simulation instruction in a predetermined state while storing the state of the apparatus in the current situation, A data extraction function that automatically extracts each of the stored information from each device, a simulation data editing unit (9) that edits each of the stored information into simulation input data, an internal clock, and the processing time and process of the process. Do A simulation execution unit (10) for predicting a product processing completion date of a lot with a higher priority by performing a simulation in consideration of the device processing capacity, waiting time for workers, and the priority of the lot from the number of sets, and the simulation execution unit. The evaluation unit (11) for evaluating whether or not the product processing completion date of the higher priority lot predicted by simulation by means of the set delivery date and the evaluation unit (11) have a higher priority. A production control device comprising: alarm means for issuing an alarm when it is determined that the product processing completion date of one lot exceeds the set delivery date.