JPH0430954A - Method and device for planning input program of part to be processed - Google Patents

Abstract

PURPOSE:To enable a production control based on the optimum input program of the part group to be processed, by correctly predicting the production completion scheduled time of the part group to be processed to be input and postponing or advancing the input scheduled time of the part group to be processed from the initial set time. CONSTITUTION:An arithmetic part 2, the part group to be processed data memory 3, the data in process memory 4, etc., are equipped with. The loads of each manufacturing devices at the set input scheduled time of the part group to be processed are predicted based on the input scheduled number of the part group to be processed and the number in process. In the case of the load predicted result exceeding the process capacity, the production completion predicted time of the part group to be processed is calculated after the input scheduled time being postponed from the initial set time. In the case of the calculated production completion scheduled time exceeding the delivery of the part group to be processed, the production completion predicted time of the part group to be processed that can observe the delivery is made to be calculated after advancing the input scheduled time of the days part exceeding the delivery of the load from the initial set time afresh. The production control can thus be performed based on the optimum input program of the part group to be processed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a process for creating an input plan that can meet the delivery deadline for a group of workpieces to be processed by a plurality of manufacturing devices. This invention relates to an input planning method and device.

[Conventional technology]

Conventionally, when managing the production of a production line consisting of multiple manufacturing devices, the manager has to calculate the load for each manufacturing device, that is, the number of workpieces to be processed by this, in advance. It is necessary to understand everything and create a loft input plan that will ensure that the load on each manufacturing device does not exceed its processing capacity. According to production management based on such an input plan, the number of lofts in progress in each manufacturing device will be reduced, and the construction period required for the production of each lot will not be extended. It is possible to realize a production state where it is possible to

Therefore, if we consider a production line that processes a wide variety of semiconductor products as an example of such a production line,
Lots input into this production line are circulated among a plurality of manufacturing devices in a predetermined order, and are manufactured into products by being subjected to necessary processing in each manufacturing device.

However, each lot on a semiconductor product production line is typically processed multiple times using the same manufacturing equipment until all processing is completed. Furthermore, since the order and number of processing steps differ depending on the product type, it is difficult for managers to plan the lot input after understanding all the loads on each manufacturing device. It was difficult.

Therefore, the manager determines in advance the manufacturing equipment that will perform the main processing for each lot, predicts the load on this manufacturing equipment, and then makes sure that these nine loads do not exceed the processing capacity of the manufacturing equipment. It has become common practice to create a loft input plan and manage production.

[Problem to be solved by the invention]

By the way, when creating a lot input plan necessary for production management, it is difficult to understand all the different loads for each manufacturing device and to understand the load status of the entire production line in chronological order. It's difficult.

Therefore, it is extremely difficult to predict when production will be completed for each of the four slots, and the load on manufacturing equipment other than the main manufacturing equipment exceeds its processing capacity, resulting in the construction period required to produce each lot to be longer than planned. Even if there is
The administrator could not have known such a situation in advance. As a result, it is not possible to formulate an input plan that can meet the delivery date for Roa) by changing the input plan for Roa) set in advance by the administrator, and it is not possible to create an input plan for Roa) that is optimal for this production line. At present, it is not possible to manage production based on this.

The present invention was devised in view of the current situation, and it accurately predicts the expected production completion time of a group of products to be sequentially processed by a plurality of manufacturing devices, and based on the prediction results, To provide a method and apparatus for formulating an input plan for items to be processed that can meet the delivery dates of each group of items to be processed by moving the scheduled input time of the group of items to be processed later or earlier than the initially set time. The purpose is to

[Means for Solving the Problems] A workpiece input planning device according to the present invention is a method for formulating an input plan for a group of workpieces to be sequentially input to be processed by a plurality of manufacturing devices, the method comprising: After predicting the load for each manufacturing device at the initially set scheduled time of inputting the group of processed items based on the planned input number of the group of processed items and the number of work in progress, the obtained load prediction results and the load of each manufacturing device are calculated. If the load prediction result exceeds the processing capacity, the scheduled time of input for the number of days beyond the delivery date of the load will be postponed from the initially set time, and then the scheduled time of completion of production of the group of products to be processed will be set. After calculating the expected production completion time, compare the calculated production completion time with the delivery date of the product group, and if the calculated production completion time exceeds the delivery date of the product group, set the delivery date of the load again. The present invention is characterized in that the scheduled time of production for the group of products to be processed that can meet the delivery date is calculated by moving the scheduled input point for the number of days exceeding the initial set point forward from the initially set point.

Further, the workpiece input planning device according to the present invention is a device that creates an input plan for a group of workpieces to be sequentially inputted to be processed by a plurality of manufacturing devices, and comprises a first storage means for storing the scheduled input time of the group, the scheduled number of inputs, and the delivery date; a second storage means for storing the number of products in process at that time; and a third storage means for storing the processing capacity of each manufacturing device. a storage means, a prediction means for predicting the load of each manufacturing device at the initially set scheduled time of inputting the group of processed items based on the planned input number of the group of processed items and the number of work in progress; and the obtained load. A first comparison means that compares the prediction result with the processing capacity of each manufacturing device, and if the load prediction result exceeds the processing capacity, the scheduled loading time is postponed by the number of days that exceed the load delivery date from the initially set point. a first production completion schedule calculation means for calculating the scheduled production completion time of the group of products to be processed based on the calculation results; a second comparison means for comparing the calculated scheduled production completion time with the delivery date of the group of products to be processed; If the scheduled production completion time exceeds the delivery date of the product to be processed, the scheduled production time will be moved forward by the number of days that exceed the delivery date of the load, and the production completion time that will meet the delivery date will be determined. The present invention is characterized by comprising a second production completion schedule calculation means for calculating.

[Effect]

First, by adding the number of products to be processed and the number of work in progress at the time when the group of products to be processed is initially scheduled to be introduced, the load on each A manufacturing equipment at the time of initial setting is predicted. By comparing the obtained load prediction results with the processing capacity of each manufacturing apparatus, it is determined whether the load on each manufacturing apparatus exceeds its processing capacity. If the load prediction result exceeds the processing capacity, the load is leveled by delaying the scheduled time of input for the excess load from the initially set time so that the load does not exceed the processing capacity of the manufacturing equipment. Calculate the scheduled completion point of production for the group of products to be processed. Therefore, this scheduled production completion point indicates when the delivery date will be when the group of products to be processed is introduced, taking into account the processing capacity of each manufacturing device.

However, when processing a group of products to be processed, it is necessary to comply with a predetermined delivery date, and it is meaningless unless the calculated estimated production completion time is within the delivery date of the group of products to be processed. Don't do it. Therefore, if the calculated scheduled production completion time exceeds the delivery date that must be observed for the group of products to be processed, the scheduled time of input for the number of days that exceeds the delivery date of the load will be brought forward from the initially set point, and then the product will be processed. Calculate the scheduled completion point of production for a group of products. Then, the scheduled production completion time calculated in this way takes into account the processing capacity of each A manufacturing equipment and indicates the scheduled production completion time for the group of processed products that can reliably meet the required delivery date. Become.

(Example〕 Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing the configuration of an input planning device for products to be processed according to the present invention, in which reference numeral 1 is an input section, 2 is a calculation section, and 3 is data for a group of products to be processed (input, t). 4 is a storage section; 4 is an in-process data storage section; and 5 is a device data storage section.

This input section 1 contains the initially set scheduled input date and number of inputs for each lot, its delivery date, a process procedure indicating the order of processing required for each lot, and standard production! IJI (standard value of the construction time required for each input loft to reach each manufacturing device), equipment correspondence information (information that associates the necessary processing with the manufacturing equipment used), number of operating days, each Various data necessary to calculate the scheduled production completion date of the loft, such as the processing capacity of the manufacturing equipment, are manually generated. The various data input to this input section 1 are
Prediction means for predicting the load for each manufacturing device on the scheduled start date of the loft and calculating the expected time of completion of production of the loft based on the obtained load prediction result; and 1. The second comparison means and the first comparison means. It is given to the calculation unit 2 which functions as a second production completion schedule calculation means. In addition, a host computer 10 that manages the entire production line is connected to the calculation unit 2 via a communication line, and the host computer 10 sends information to the calculation unit 2 regarding the number of lots in progress in each manufacturing device. Data is entered daily.

Furthermore, among the various data input from the input unit 1 to the calculation unit 2, data related to lots, such as the initially set scheduled introduction date and number of inputs for each lot, its delivery date, process procedure, standard construction period, etc. Data regarding the number of work in process for each manufacturing device is stored in the loft data storage unit 3 serving as a first storage unit, while data regarding the number of work in progress for each manufacturing apparatus is stored in a work in progress data storage unit 4 serving as a second storage unit. In addition, information on the equipment used,
Data regarding the manufacturing equipment, such as the number of days of operation and the processing capacity of each manufacturing equipment, is stored in the equipment data storage unit 5 as a third storage means.
is memorized. While the loft data storage section 3 and the equipment data storage section 5 each store in advance various data input from the human resources section 1, the work-in-process data storage section 4 stores the data required by the calculation section 2. The number of work in progress at the loft at the final point of the day before the calculation processing day, that is,
Data regarding the number of work-in-progress on the day of arithmetic processing, which fluctuates daily, is updated and stored on a daily basis. Therefore, the data stored in each of the storage units 3 to 5 is read out to the calculation unit 2 as necessary, and is subjected to calculation processing in order to calculate the expected time of completion of production of the loft. It should be noted that the loft insertion plan obtained as the final result of this calculation process is displayed on a display unit 6 made of a CRT or the like.

Next, a method of formulating a lot input plan using the processing object input plan planning device configured as described above will be explained.

Fig. 2 is a flowchart showing the procedure for formulating a lot injection plan according to the present invention, Fig. 3 is an explanatory diagram showing the initially set lot injection plan, and Fig. 4 is a process for loft of type A. An explanatory diagram showing the procedure and standard construction period, Fig. 5 is an explanatory diagram showing the load prediction results obtained based on the input plan initially set for the manufacturing equipment I used in processes A and E, Fig. 6 Figure 7 shows a lot introduction plan drawn up by moving forward the scheduled loft introduction dates based on the load prediction results, and Figure 7 shows a lot introduction plan drawn up by moving up the loft introduction dates. FIG. Note that FIG. 4 shows that the input loft reaches the manufacturing equipment I used in process A on the first day, and then reaches the manufacturing equipment I again to perform the processing in process E. First, when formulating a feeding plan, there is a step to read out data such as equipment information and number of operating days from the equipment data storage unit 5 to the calculation unit 2. 1) Next, the data such as the initially set scheduled input date and number of inputs, delivery date, process procedure, standard construction period, etc. are read out from the lot data storage unit 3 to the calculation unit 2 (Step 2), and then each Data regarding the number of work-in-progress on the day of calculation execution in the manufacturing equipment is read from the work-in-process data storage section 4 to the calculation section 2 (step 3).

Then, by executing the arithmetic processing in the calculation unit 2, the load for each manufacturing device on the initially set scheduled lot input date, for example, the load on the manufacturing device ■ used in processes A and E, is calculated by the planned number of lots to be input ( The prediction is made as shown in FIG. 5 (step 4) based on the number of work in progress (see FIG. 3) and the number of work in progress (step 4). , the load for each manufacturing device is predicted for each date that is the initially set loft scheduled start date, that is, the 1st, 2nd, etc. of a predetermined month. In addition, this Figure 5 shows an example of the load prediction results for the manufacturing bag WI whose processing capacity is 50 lofts/day, and the lot of type A was processed on the 1st day by the manufacturing equipment ■. This shows that the same processing will be performed again on the 3rd day using the same manufacturing apparatus I.

Next, when the load prediction result for each manufacturing device is calculated in this way, the processing capacity of the manufacturing device ① is 50 ront/day, for example, from the device data storage unit 5. After reading out the processing capacity of each manufacturing equipment to the calculation unit 2 (step 5), the load prediction result of each manufacturing equipment and its processing capacity on the initially set loft launch date are compared, and the load prediction result is It is determined whether the processing capacity is below or not (Step 7, Step 6).

If the load prediction result for each manufacturing device exceeds its processing capacity, the load for each manufacturing device on each scheduled start date is reduced by moving the scheduled start date for the excess load to Narita or later from the originally set date. The processing capacity is leveled so as not to exceed the processing capacity, and the scheduled loft introduction date is changed as shown in FIG. 6 (Step 7). In addition, this Figure 6 shows the loft input plan for manufacturing equipment I. In this example, since the processing capacity of manufacturing equipment I is 50 lots/day, the load prediction result for 3 days indicates the processing capacity. This figure shows a case where the scheduled introduction date for 10 lofts of variety C is postponed to 4 days because the amount exceeds 10 lots. Further, the load adjustment for each manufacturing device on each scheduled input date is performed sequentially according to the process procedure, and the scheduled loading date of the lofts for the manufacturing devices used in all subsequent processes is postponed as a whole. After that, in the calculation unit 2, the expected production completion date of the loft is calculated based on the input plan with the scheduled input date pushed back (step 8), and the calculated scheduled production completion date is calculated based on the input plan with the scheduled input date pushed back. will indicate when the delivery date for the product (Loa) will be. Then, the scheduled production completion date of the lot is compared with the delivery date read out in advance, and it is determined whether the scheduled production completion date is earlier than the delivery date (step 9).

Furthermore, as a result of this judgment, if the calculated scheduled production completion date of the lot is later than the delivery date, the scheduled input date for the load will be moved forward by the number of days that exceed the delivery date to one day earlier than the originally set date. After ensuring that the load on each manufacturing device does not exceed its processing capacity on each scheduled input date,
The scheduled start date of the loft is changed as shown in FIG. 7 (Step 10). In addition, this Figure 7 shows the lot input plan for manufacturing equipment ■.In this example, the delivery date for the loft of variety A is 5 days even though it is 4 days. This shows the case where the scheduled launch date is moved forward by one day. In other words, according to the initial input plan shown in Figure 5, 20 lots of this type A will be input to manufacturing equipment ■ on the 3rd to be processed in process A, and again on the 5th to manufacturing equipment I. Processing of process E was scheduled to be performed, but after the processing of process E was performed on manufacturing equipment I on the 2nd, the processing of process E was performed in manufacturing equipment I on the 5th. By doing so, the scheduled release date has been moved forward so that the product can be completed. Note that this adjustment of the load for each manufacturing device on each scheduled input date is performed sequentially according to the process procedure, and the scheduled input date of lots in the manufacturing devices used in all subsequent processes is generally postponed.

Thereafter, the calculation unit 2 calculates the expected production completion date of the lot again based on the input plan in which this scheduled input date is postponed (step 8). Therefore, the scheduled production completion date calculated in this manner takes into account the processing capacity of each manufacturing device and indicates the scheduled production completion date of the lot that can reliably meet the required delivery date. The lot input plan obtained as the final result of the arithmetic processing by the arithmetic unit 2 is displayed on the display unit 6, such as a CRT (step 11).

〔Effect of the invention〕

As explained above, according to the method and device for formulating a schedule for inputting workpieces according to the present invention, it is possible to accurately predict the expected production completion point of a group of workpieces to be sequentially input to be processed by a plurality of manufacturing devices. Based on the results of the sub-measurements, a loading plan that can meet the delivery date of each group of items to be processed is created by moving the scheduled loading time of the group of items to be processed later or earlier than the initially set time. the result,
The manager in charge of production management grasps all the different loads for each manufacturing device, that is, the load status of the entire production line in chronological order, predicts the point at which production is completed for each group of products, and formulates an input plan. This is not necessary at all, and provides the excellent effect of being able to perform production control based on the input plan for the group of products to be processed that is optimal for this production line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a processing material input planning device according to the present invention, FIG. 2 is a flowchart showing the procedure for formulating a lot input plan according to the present invention, and FIG. 3 is an initial setting. Explanatory diagram showing the lot input plan, Part 4
The figure is an explanatory diagram showing the process procedure and standard construction period for a lot of type A, and Figure 5 is a load prediction obtained based on the input plan initially set for manufacturing equipment I used in processes A and E. Figure 6 is an explanatory diagram showing the results, and Figure 6 is an explanatory diagram showing a lot loading plan created by pushing back the scheduled lot loading date based on the load prediction results, and Figure 7 is an explanatory diagram showing the loft loading date brought forward. FIG. In the figure, numeral 2 is a calculation section, 3 is a lot data storage section,
4 is an in-process data storage section, and 5 is a device data storage section. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A method of formulating an input plan for a group of workpieces to be processed sequentially by multiple manufacturing devices, which calculates the load on each manufacturing device at the time when the group of workpieces is initially scheduled to be input. After making a prediction based on the expected number of inputs and the number of work in process for the group of products to be processed, the obtained load prediction result is compared with the processing capacity of each manufacturing equipment, and if the load prediction result exceeds the processing capacity, After calculating the expected production completion time of the group of products to be processed by deferring the time when the excess load is input to the manufacturing equipment from the initially set time, the calculated scheduled time of completion of production and the delivery date of the group of products to be processed are calculated. If the calculated scheduled production completion time exceeds the delivery date of the group of products to be processed, the scheduled delivery time will be moved forward by the number of days that exceed the delivery date of the load, and the delivery date will be changed. A method for formulating a schedule for inputting products to be processed, characterized by calculating a scheduled production completion point for a group of products to be processed that can be complied with. (2) A device that creates an input plan for a group of processed items to be sequentially processed by multiple manufacturing devices, and that determines the initially set scheduled input time, planned number of input, and delivery date for the group of processed items. A first storage means for storing, a second storage means for storing the number of products to be processed in process at that time, a third storage means for storing the processing capacity of each manufacturing device, and an initially set group of products to be processed. A prediction means that predicts the load on each manufacturing device at the scheduled input time based on the planned input number of processed products and the number of work in progress, and compares the obtained load prediction result with the processing capacity of each manufacturing device. If the load prediction result exceeds the processing capacity, the time when the excess load is input to the manufacturing equipment is postponed from the initially set time, and the time when production of the group of products to be processed is scheduled to be completed is determined. a first production completion schedule calculation means for calculating the production completion schedule, a second comparison means for comparing the calculated production completion schedule time with the delivery date of the product group to be processed, and a case where the scheduled production completion time exceeds the delivery date of the product group to be processed; The method further includes a second production completion schedule calculation means that calculates a production completion schedule that can meet the delivery date by moving the scheduled input time for the number of days that exceed the load delivery date from the initially set time. A processing material input planning device characterized by: