JPH0786112A - Production control method - Google Patents

Abstract

PURPOSE:To provide a production control method in which a worker can select the processing order easily and the productivity can be enhanced through efficient transfer. CONSTITUTION:An average processing time is calculated in a production system for a preceding lot and a previously measured processing time. An average waiting time is then calculated in production system for the preceding lot and a previously measured waiting time. Subsequently, a critical value is determined based on the average values thus calculated. Upon finishing the processing of lots, a production unit having a smallest processing number stored in a production information file is selected among those which can be processed in the following step and a device is transferred to a corresponding warehouse.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production management method during which a product is transported to a manufacturing processing apparatus in units of lots and processed in the order of manufacturing steps to complete the product.

[0002]

2. Description of the Related Art In a manufacturing process of a semiconductor device or the like, a material which is made of wafers is transferred in a cassette which can store about 25 sheets. There is a so-called batch processing apparatus which performs the processing, and a so-called single-wafer processing apparatus which takes out one by one from a cassette and performs processing individually. A manufacturing factory equipped with such a manufacturing processing apparatus manufactures products of several tens of kinds, and the order of manufacturing processes (process flow) is set according to each kind. The process flow corresponding to this product type and the data such as the processing conditions of the manufacturing processing device used in the manufacturing process are stored in the database for each management unit (hereinafter, referred to as a lot), and the lot unit is used for all process flows. Will proceed with.

FIG. 9 is a block diagram of a conventional production control apparatus. The production control apparatus mainly communicates with a host computer 1 for production control and process control, a database 10 connected via a line 11, and a communication. It is composed of a plurality of terminals 4 connected to the host computer 1 via the line 20 and the terminal server 40.

The database 10 is stored in a storage means such as a hard disk, and is shown in FIG.
It is constructed from a process information file in a table format as shown in 0. In the process information file, a process name (process flow) 10c for each processing order, its processing condition 10i, and a processable manufacturing apparatus name 10j are recorded corresponding to the product name 10f, and each product name 10f. It is stored in units.

Therefore, when the worker inputs the desired product name 10f and process name 10c from the terminal 4 shown in FIG. 9, the corresponding manufacturing apparatus name 10j and processing condition 10i are entered.
Can be retrieved by the host computer 1 and the data can be displayed on the display of the terminal 4 via the communication line 20. In such a manufacturing factory, the products that can be processed by the manufacturing apparatus in charge of the workers are in a plurality of types and a large number of manufacturing processes, and it is not easy to determine the processing order of these products.

Therefore, one of the indexes for determining the processing order is called a criticality value. Figure 1
FIG. 1 is a diagram for explaining this criticality value, and a method for calculating the criticality value in the process flow of a certain product based on this is described. That is, there are multiple processes from the input process to the finished process, and in order to calculate the criticality value at a certain time (current work-in-process), first, the remaining time from the current date and time to the designated work date which is the designated delivery date is calculated. Calculate the time (unit: day). Next, the sum of each set cycle time from the current work-in-process to the finished process is obtained, and the remaining time calculated previously is divided by the sum of the set cycle times.

The set cycle time (T _i ) is obtained from the sum of the processing waiting time and the processing time preset for each process. For example, if the entire process flow cannot be completed by the specified date, the criticality value will be a “negative” value, and if a process that matches the completion schedule of a certain process is performed, the criticality value will be obtained. Is a value of "1". If the processing is delayed from the scheduled completion, the criticality value is between "0 and 1". Conversely, if the processing is advanced from the scheduled completion, the criticality value is larger than "1". Become.

[0008] Therefore, by arranging the products in the order of the criticality values, it becomes easy to know which product has a delayed process or is advanced.
It will be helpful for the worker to decide the processing order.

On the other hand, in a semiconductor device manufacturing factory, when a wafer material is stored in a cassette and is transported,
From the viewpoint of preventing dust from adhering to the wafer, automation of transportation is being promoted in order to isolate the operator from the wafer as much as possible. In recent years, an orbit-type overhead traveling linear motor-driven transfer vehicle has been installed in the manufacturing plant so that wafers and other products can be automatically transferred in cassette units from a warehouse for storage to a manufacturing processing device in each manufacturing process. It has become. In such a manufacturing factory, these manufacturing processing devices and a computer are connected via a communication line, various types of information are exchanged, and information management is performed to control automatic transportation in the manufacturing process to control production. Is going.

FIG. 12 is a diagram for explaining various files for performing such production control. That is, these various files are stored in the database 10 connected to the host computer 1 shown in FIG.
As shown in FIG. 12A, the process information file stores a process name (process flow) 12c described in the order of processes corresponding to each product name 12f, processing conditions 12i, and a warehouse name 12s in which the product is stored. ing.

Further, as shown in FIG. 12B, a lot name 12a, a work-in-process name 12k, a product name as work-in-progress information files of all products (lot units) existing in the manufacturing plant at the present stage. 12f and the quantity (number of sheets) 12m are stored. Based on these files, automatic transfer between warehouses and storage management of products are performed.

In other words, when a lot is put into the warehouse and the lot is stored in the warehouse, the lot name and its accompanying information are transmitted to the host computer 1 shown in FIG. 9, and the host computer 1 is connected. The in-process information file of the database 10 is searched. Then, the in-process step name 12k at the present time corresponding to the transmitted lot name 12a is extracted from the in-process information file shown in FIG. 12 (b). Then, based on the in-process step name 12k, the process information file shown in FIG. 12A is searched, the process name 12c corresponding to the previously-processed in-process step name 12k is extracted, and the process name The warehouse name 12s corresponding to 12c and the process name 12c described in the following processing order are extracted.

At this point, the extracted warehouse name 12s and process name 12k are designated by the instruction from the host computer 1, and after the processing is completed, the product is temporarily stored in the warehouse indicated by the warehouse name 12s. Then, in response to a request from the manufacturing processing apparatus in the next process name 12k, the product is transported from the stored warehouse and set in the requesting manufacturing processing apparatus. Simultaneously with this transportation, the processing condition 12i described in the process information file is sent to the manufacturing processing apparatus to perform a predetermined processing. When the lot name 12a is transmitted to the host computer 1 when the processing is completed, the in-process step name 12k corresponding to the lot name 12a in the in-process information file is updated to the next process name 12c. By repeating such operations, production control up to the final process is performed.

[0014]

However, such a production control method has the following problems. That is, in order for the worker to calculate the criticality value that is used as a reference for determining the processing order, it is necessary to find the set cycle time in a large number of steps, which requires a great deal of labor. Further, the processing waiting time of the set cycle time varies depending on the operating conditions of the manufacturing processing apparatus and the production environment such as intermediate stock, and is not necessarily uniform even in the same product type and process. Therefore, the validity of the criticality value calculated based on the preset set cycle time is impaired, and it is very difficult for the operator to calculate the set cycle time by obtaining realistic data. Will be accompanied.

Further, in the case of performing production management in a manufacturing factory by automatic transportation, only the warehouse name corresponding to the process name is described in the above-mentioned process information file, and a plurality of manufacturing processes are performed in the same process. When the processing device is provided, it is difficult to efficiently transfer the product to each manufacturing processing device because the warehouse for transferring the product is registered in the process. In addition, for multiple manufacturing processing equipment in the same process,
It is impossible to set the processing conditions in consideration of the characteristics peculiar to each manufacturing processing apparatus, which makes it difficult to perform precise processing control. Therefore, it is an object of the present invention to provide a production management method in which a worker can easily select a processing order and can improve product productivity by efficient transportation.

[0016]

The present invention is a production control method that has been made to solve such problems. In other words, in a production management method in which products are sequentially input to the manufacturing processing device in lot units and the products are sequentially manufactured by the set delivery date along each of the determined manufacturing processes, the processing for one lot is actually performed by the manufacturing processing device. The determined processing time and the processing waiting time from the end of the processing of the manufacturing process immediately before the processing by the manufacturing processing device to the start of the processing by the manufacturing processing device are measured for each manufacturing process.

Then, an average value of the processing time in the manufacturing processing apparatus of the lot before the one lot and the processing time measured previously is calculated, and the processing waiting time in the manufacturing processing apparatus of the lot before the one lot is calculated. The average value with the previously measured processing waiting time is calculated. The progress of processing at a predetermined time of this lot is expressed by the ratio of the remaining time from the predetermined time to the set delivery time with respect to the total time of the average value of the processing time and the average value of the processing waiting time in each manufacturing process after the predetermined time. It was done like this.

Further, when the processing of the product in units of lots in a predetermined manufacturing process is completed, the products are stored in a predetermined warehouse via the transport means, and from the warehouse to a manufacturing processing apparatus capable of processing in the next manufacturing process. In a production management method for managing production so that a product is transported, a plurality of manufacturing processes for manufacturing a product are stored in advance in the order of processes, and a manufacturing processing apparatus capable of performing processing in each manufacturing process is stored. A process information file that stores at least one device name is created, and a warehouse name of a warehouse for temporarily storing products to be carried into the manufacturing processing device and a lot waiting for the processing in the manufacturing processing device. An apparatus information file is created in which the number of processing waits consisting of numbers is stored for each manufacturing processing apparatus.

Then, at the time when the processing of the lot by the predetermined manufacturing process is completed, the manufacturing process next to the manufacturing process stored in the process information file is read out and the manufacturing processing apparatus capable of performing the process in the next manufacturing process. The one having the smallest number of processing waits stored in the manufacturing information file is selected, and the warehouse name of the warehouse corresponding to the selected manufacturing processing apparatus is read from the manufacturing information file. Products that have been transported from the manufacturing processing equipment that has finished processing this lot to the warehouse indicated by the warehouse name, and from that warehouse to the manufacturing processing equipment that can process the next manufacturing process Is.

[0020]

[Operation] In the production management method, in which each lot is put into the manufacturing processing device and the products are sequentially manufactured by the set delivery date according to the determined manufacturing process, the processing by the manufacturing processing device is actually performed for one lot. Accurate set cycle time is obtained by measuring the processing time that has been cut and the processing waiting time from the end of the processing of the previous manufacturing process to the start of the processing for each manufacturing process. You can Further, an average value of the processing time in the manufacturing processing device of the lot before the one lot and the processing time measured previously is calculated, and the processing waiting time in the manufacturing processing device of the lot before the one lot and the processing time are measured first. By obtaining the average value with the processing waiting time, an average set cycle time can be obtained every time a lot of lots are processed. Accurate criticality by expressing the ratio of the remaining time from the specified time to the set delivery time with respect to the total time of the processing time and the processing waiting time of each manufacturing process after the specified time based on the set cycle time thus obtained. You can get the value.

Further, at the time when the processing of the product in units of lots in a predetermined manufacturing process is completed, the product is stored in a predetermined warehouse via the transporting means, and the manufacturing processing apparatus capable of performing the process in the next manufacturing process from the warehouse. In a production management method for managing production so as to convey a product to a device, a plurality of manufacturing processes corresponding to the product are stored in advance in a process order, and a device of a manufacturing processing apparatus capable of performing processing in each manufacturing process. By creating a process information file in which at least one name is stored, it becomes possible to set processing conditions corresponding to a plurality of manufacturing processing devices that can process in the same process. Further, the number of lots waiting for the processing by the plurality of manufacturing processing apparatuses is stored, and the product is carried to the one having the smallest waiting number, so that the product is efficiently carried.

[0022]

Embodiments of the production control method of the present invention will be described below with reference to the drawings. FIG. 1 is a flow chart for explaining a main part of the production management method of the present invention, and FIG. 2 is a configuration diagram of a production management device for carrying out the production management method of the present invention. First, prior to the description of the production management method of the present invention, the production management device will be described. As shown in FIG. 2, the production control apparatus includes a host computer 1 having functions of production control and process control,
A database 10 including a hard disk connected to a host computer 1 via a line 11 and a plurality of local computers 2 connected to a manufacturing device group, the same line, or area via a communication line 20 such as a LAN. It is composed of a terminal 4 connected via a line 20 and a terminal server 40.

The local computer 2 has a communication line 2
Some are connected to an online manufacturing apparatus 31 directly connected via 0a, and some are connected to a communication line 20b and an offline manufacturing apparatus 32 connected via a handy terminal 30, which is an information input / output terminal. This local computer 2 stylizes and transmits information collected in various forms to the host computer 1 via the communication line 20, or reads information in the database 10 to the online manufacturing apparatus 31 or the offline manufacturing apparatus 32. Play a role in providing.

The terminal 4 is an information input / output terminal of the host computer 1 and is used for backing up information collection when the production control apparatus is started, stopped or partially stopped. The host computer 1 and each local computer 2 are connected via a server 40 and a communication line 20.

The database 10 managed by the host computer 1 stores various files as shown in FIG. That is, FIG. 3A shows a manufacturing process history file, which shows a time 3b when a lot of a certain lot name 3a is processed, a process name 3c, and a process size 3d (for processing by a batch processor). Is "B",
“E” for processing by the single-wafer processing apparatus, processing content 3e
(“Processing start”, “Processing end”, etc.) is recorded for each lot by executing mutual communication between the online manufacturing apparatus 31 or the offline manufacturing apparatus 32 and each local computer 2.

Further, FIG. 3B shows a process information file, which includes a process name 3c corresponding to the product name 3f, a processing size 3d, a cycle time composed of a waiting time 3g and a processing time 3h, which will be described later, A processing condition 3i and a processable manufacturing apparatus name 3j are recorded for each product name 3f. Further, FIG. 3C shows a work-in-progress information file, in which the current work-in-process step name 3k for the lot name 3a,
Product name 3f, quantity 3m, work order date 3n, processing status 3
p and the criticality value 3q shown in FIG. 11 are stored.

Next, a production management method using this production management apparatus and the various files described above will be described. First, when the lot is loaded, the handy terminal 30 of the online device 31 or the offline device 32 is operated to transmit a “processing start inquiry” to the host computer 1 via the local computer 2. The “processing start inquiry” at this time includes the lot name 3a to be processed and the manufacturing apparatus name 3j used for processing the lot. When the host computer 1 receives this notification, the host computer 1 refers to the in-process information file in the database 10 and reads out the in-process step name 3k and the product name 3f corresponding to the notified lot name 3a.

Next, referring to the process information file, whether the processable manufacturing device name 3j corresponding to the read product name 3f and process name 3c matches the processing device that has transmitted the "process start inquiry". Is checked, and if they match, a “processing start instruction” is transmitted from the host computer 1 to the local computer 2. At the same time, the data of the process size 3d is read from the process information file, and the process start time, the process name 3c, the process size 3d, the process content 3e are displayed in the column of the time 3b of the corresponding lot name 3a in the manufacturing process history file. To record.

When the processing is completed, "processing completed" is notified to the host computer 1 through the same route as described above. The data content of this notification includes the actual lot name 3a and the used device name. , Quantity of 3m is included. Based on these data, in-process information file,
By sequentially referring to the process information file, the information regarding the corresponding lot is read out, and finally the processing state 3p of the work-in-progress information file is set to “waiting for processing”, and the processing content 3e of the manufacturing processing history file is set as the processing end. The time 3b is recorded. If there is an interruption in the middle of the processing, or if the interruption is canceled and the processing is restarted, each processing content 3e (“processing interruption” or “processing restart”) and its time 3b are recorded. Keep it.

Next, after recording the data "processing completed", the cycle time of this product type is reset based on the flow chart shown in FIG. That is, when processing of a lot is completed (step 1a), data is extracted from the manufacturing process history file (step 1b), and when processing in a predetermined process of a lot is completed, the processing time shown in the equation (1) is reached. (Time (A)) is measured.

[Equation 1] As a result, it is possible to measure the actual operating time excluding the time when the processing was interrupted.

Similarly, the process wait (Tim
e (B)) is measured.

[Equation 2] Then, the cycle time is obtained from the sum of the processing time (Time (A)) and the processing waiting time (Time (B)).
When it is determined in step 1c that the device is the single-wafer processing apparatus, the processing time (Time (A)) measured in step 1d is calculated by using the formula (3). Converted to.

[Equation 3]

Next, using these processing time and processing waiting time, the cycle time for each process is calculated (step 1
The actual results average values of the processing time and the processing waiting time are calculated using e) and (4).

[Equation 4]

As a result, an average value of each processing time in the manufacturing processing apparatus of the lot before the one lot and the processing time in the lot is obtained, and each processing in the manufacturing processing apparatus of the lot before the one lot is obtained. An average value of the waiting time and the processing waiting time for the lot will be obtained. The processing time obtained here is described in the processing time 3h column of the process information file, and the processing waiting time is similarly described in the processing waiting time 3g column. In other words, for the first lot, the measured cycle time is written as it is, and for the second and subsequent lots, the average value of the data of all lots including the cycle time before it is equally updated and updated. become.

Even if a trouble occurs in the manufacturing processing apparatus during the processing of the lot and the processing is interrupted, or if the processing is restored and the processing is restarted, the manufacturing processing history file corresponds to each processing. Since the time 3b is recorded, these data are taken into consideration in the calculation of the cycle time.

Then, a criticality value as shown in FIG. 11 is calculated based on the cycle time described in this way, and is written in the column of the criticality value 3q in the work-in-progress information file. The worker can create a sorted list based on the magnitude of the criticality value 3q of this work-in-progress information file, and can obtain information such as the priority order of processing based on this.

Next, in a semiconductor device production factory,
A production control method when a product made of wafers is housed in a cassette and conveyed will be described. FIG. 5 is a diagram for explaining the transport path in the factory. A plurality of manufacturing apparatuses 33 are arranged in the production factory 21, and these manufacturing apparatuses 33 can perform the same process in several units, for example, A It is divided into a group and a group B composed of several other units. The transport path for transporting the product includes an intra-process transport path 24 for transporting the product in each same process, and an inter-process transport path 27 for transporting each process. Further, the in-process transport path 24 is provided with warehouses 25a to 25d for temporarily storing the products transported to the manufacturing apparatus 33, respectively.

In order to carry out production management while transporting products using the transport path in the production factory 21, a transport device as shown in FIG. 4 is used. That is, this transport device is managed by the host computer 1,
The communication line 2 includes a plurality of manufacturing apparatuses 33 arranged on each manufacturing line, an automatic warehouse controller 25, and an in-process transfer control computer 26 for controlling the in-process transfer path 24.
It is connected to the local computer 2 via 0a, 20b ....

The local computer 2 is connected to each manufacturing apparatus 3
3 has a function of stylizing various data transmitted from the computer 3 to the host computer 1 or providing various information in the database 10 managed by the host computer 1 to each manufacturing device 33 in response to a request from the manufacturing device 33. . Further, the local computer 2 is provided between the manufacturing apparatuses 33 located in the same manufacturing line, and between the manufacturing apparatuses 3
3 issues a transfer instruction to the in-process transfer control computer 26 that controls automatic transfer between the automatic transfer controller 3 and the automatic warehouse controller 25.

In order to perform production management using such a carrier device, based on a process information file, a device information file, and a work-in-progress information file as shown in FIG. 6 in the database 10 managed by the host computer 1. To do. That is, in the process information file shown in FIG. 6A, for each product name 6f, the process name 6c for manufacturing the product is arranged in the order of processes, and the processable manufacturing for processing each process name 6c is performed. At least one device name 6j is described. In addition, the manufacturing device 33 described in each manufacturing device name 6j
The processing conditions 6i corresponding to the above are respectively described, and can be registered according to each manufacturing apparatus 33.

In the apparatus information file shown in FIG. 6B, the operating state 6r for each manufacturing apparatus name 6j and the warehouse name 6 connected to the manufacturing apparatus 33 indicated by the manufacturing apparatus name 6j.
s and a processing waiting number 6t indicating the number of products waiting for processing by the manufacturing apparatus 33 are described. In addition, FIG.
In the in-process information file shown in (c), the lot name 6a, the in-process step name 6k, the product name 6f, the quantity 6m, the processing state 6p, and the scheduled processing device name 6u of all products in process in the factory. Is listed. In the processing state 6p, the state before the processing is set to the “processing waiting” state and the state from the start to the completion of the processing is set to the “processing in progress” state.

Next, a production management method based on such various files will be described in order with reference to the flowcharts of FIGS. 7 and 8 and FIGS. 4, 5 and 6. For example, if a lot that has been processed by the manufacturing apparatus 33 of Group A is returned to the warehouse 25a via the in-process transport path 24, it is managed at this point based on the flowchart shown in FIG. That is, when this lot name is notified from the automatic warehouse controller 25 to the host computer 1 via the local computer 2, the host computer 1 will send the database 10
The in-process information file is searched (step 7a), and the product name 6f corresponding to the lot name 6a and the in-process name 6k currently in process are read.

Next, the process information file is searched (step 7b), and a plurality of processable manufacturing apparatus names 6j corresponding to the combination of the previously read product name 6f and process name 6k are read out. Then, the apparatus information file is searched (step 7c), and from the manufacturing apparatus names 6j read out earlier, the one having the operating state 6r of "up" and the minimum number of processing waits 6t is selected. The warehouse name 6s corresponding to is read. At the same time, the process waiting number 6t corresponding to the manufacturing apparatus name 6j is incremented.

Further, the selected manufacturing apparatus name 6j is described in the scheduled processing apparatus name 6u corresponding to the lot name 6a of the lot to be the target of the in-process information file conveyance (step 7).
d). And the warehouse name 6s read in the previous step
The inter-process transfer control computer 26 is notified of the transfer instruction with the warehouse indicated by as the transfer destination of this lot (step 7e), and the process for generating the inter-process transfer instruction is completed.

According to this instruction, the lot is transported to the destination warehouse via the inter-process transport path 27 and temporarily stored. As a result, even if each of the warehouses 25a to 25d is provided with a plurality of manufacturing apparatuses 33 capable of processing, and even if the warehouses straddle a plurality of production lines (in the case where the processing in the group B is performed next). Then, the manufacturing apparatus 33 in the most appropriate condition is selected from the target manufacturing apparatus group, and the lot can be supplied to the manufacturing apparatus 33 of any manufacturing line.

Next, a method of carrying out so-called in-process carrying, in which the products stored in the warehouses 25a to 25d are carried to the manufacturing apparatus 33 which constitutes the same process, will be described. That is, this transportation is performed based on the flowchart of FIG.
The lot transported from the previous process is temporarily stored in the warehouse 25a-
In the state of being stored in 25d, when the host computer 1 is notified of a lot loading request from the manufacturing apparatus 33 via the local computer 2, the host computer 1
Searches the work-in-progress information file in the database 10 (step 8a), selects the lot whose manufacturing device name notified by the lot request matches the planned processing device name 6u, and selects the product name 6f and work-in-process of that lot. Read process name 6k.

Next, the product name 6 in the process information file
The processing condition 6i corresponding to the combination in which f, the process name 6c, and the manufacturing apparatus name 6j match the one read in the previous processing is read (step 8b). Lot name 6a read here
Is sent from the host computer 1 to the automatic warehouse controller 25 via the local computer 2, and the lot name 6a and the previously read processing condition 6i are sent to the requesting manufacturing apparatus 33. Then, the requesting manufacturing apparatus 33
Is a manufacturing device name 6j indicating the in-process transfer control computer 2
6 (step 8c).

At this point, the product is carried in from the warehouses 25a to 25d to the requesting manufacturing apparatus 33 through the in-process transportation path 24 (step 8d). This manufacturing device 33
Since the processing conditions are set in step 1, predetermined processing is started when the processing is ready (step 8e), and at the same time, the manufacturing apparatus 33 sends the "processing" to the host computer 1 via the local computer 2. "Start" is notified. By the notification of "start of processing", the number 6t of waiting processing in the corresponding manufacturing apparatus name 6j of the apparatus information file is decremented (step 8f).

After that, when the processing for the lot in the manufacturing apparatus 33 is completed (step 8g), the completion is processed by the host computer 1 via the local computer 2.
Send to. Here, the host computer 1 searches the in-process information file based on the notified lot name (step 8h), and the product name 6f and the in-process name 6k of the lot.
And read out.

Next, the process information file is searched by the product name 6f and work-in-process name 6k read in the previous step (step 8i), and the process name 6c next to the current work-in-process name 6k is retrieved. The process name 6c is extracted and set to the in-process process name 6k of the in-process information file and updated (step 8j). Then, the lot name 6a is notified to the automatic warehouse controller 25 and the in-process transfer control controller 26 via the local computer 2 (step 8).
k), then the product is transferred to the warehouse 2 via the in-process transportation path 27.
5a to 25d. By repeating the above steps, the lot processing is sequentially advanced.

In this embodiment, the production of semiconductor devices has been described as an example of production control, but the present invention is not limited to this, and the production control of any product can be performed by a production line. Can also be applied to.

[0051]

As described above, the production management method of the present invention has the following effects. That is, the cycle time can be automatically set based on the actual performance data for the processing of each lot, and the criticality value based on this cycle time can be obtained. Is possible. Further, the cycle time and the criticality value can be referred to in real time and in real time, and the operator can easily determine the processing order.

Further, even if a plurality of manufacturing processing apparatuses are provided in the same process, the warehouse of the transfer destination can be determined according to the number of processing waiting of each manufacturing processing apparatus, so that the manufacturing processing apparatuses of the same process exist. Lots can be efficiently supplied to the warehouses connected to all lines. Moreover, since the lots can be supplied according to the operating state of the manufacturing processing apparatus, it is possible to supply them in a well-balanced manner as a whole. From these things, it becomes possible to improve the productivity of the product.

[Brief description of drawings]

FIG. 1 is a flowchart illustrating a main part of a production management method of the present invention.

FIG. 2 is a configuration diagram of a production management device.

3A to 3C are diagrams for explaining various files, where FIG. 3A is a manufacturing process history file, FIG. 3B is a process information file, and FIG.
Is an in-process information file.

FIG. 4 is a configuration diagram of a transfer device.

FIG. 5 is a diagram illustrating a transportation path in a factory.

FIG. 6 is a diagram illustrating various files, (a) is a process information file, (b) is an apparatus information file, and (c) is a work-in-progress information file.

FIG. 7 is a flowchart of inter-process transportation.

FIG. 8 is a flowchart of in-process transportation.

FIG. 9 is a configuration diagram illustrating a conventional example.

FIG. 10 is a diagram illustrating a conventional process information file.

FIG. 11 is a diagram illustrating a criticality value.

FIG. 12 is a diagram for explaining various conventional files, (a)
Is a process information file, and (b) is an in-process information file.

[Explanation of symbols]

 1 Host Computer 2 Local Computer 3 Inter-process Transfer Control Computer 4 Terminal 10 Database 20 Communication Line 25 Automatic Warehouse Controller 26 In-process Transfer Control Computer 33 Manufacturing Equipment

Claims (2)

[Claims] 1. A production control method in which a lot is put into a manufacturing processing apparatus and products are sequentially manufactured by a set delivery date along each of the determined manufacturing processes. The processing time actually performed by the manufacturing processing apparatus and the processing waiting time from the end of the processing of the manufacturing step immediately before the processing by the manufacturing processing apparatus to the start of the processing by the manufacturing processing apparatus are described above. Measured for each process, calculating an average value of the processing time and the measured processing time in the manufacturing processing apparatus of the lot before the one lot, and processing in the manufacturing processing apparatus of the lot before the one lot. An average value of the waiting time and the measured processing waiting time is calculated, and the progress status of the processing at a predetermined time point of the lot is calculated as an average of the processing time in each manufacturing process after the predetermined time point. A production management method characterized in that it is represented by a ratio of a remaining time from the predetermined time to the set delivery date with respect to a total time of a value and an average value of the processing waiting time. 2. A manufacturing process in which a product is stored in a predetermined warehouse via a transportation means at the time when the processing of a product in lot units in a predetermined manufacturing process is completed, and the process can be performed in the next manufacturing process from the warehouse. In a production management method for managing production so as to convey the product to an apparatus, a plurality of manufacturing processes for manufacturing the product are stored in advance in a process order, and a process in each of the plurality of manufacturing processes is performed. A process information file in which at least one device name of a manufacturing processing device that can be used is stored, and further, a warehouse name of a warehouse for temporarily storing products to be carried into the manufacturing processing device, and the manufacturing process. An apparatus information file is created for storing, for each manufacturing processing apparatus, the number of processing waits consisting of the number of lots waiting for processing in the apparatus, and At the end of the process, the manufacturing information file stored in the process information file is read out of the manufacturing process next to the manufacturing process, and the manufacturing information file of the manufacturing processing apparatus capable of performing the process in the next manufacturing process. Select the one with the smallest number of processing waits stored in, and read the warehouse name of the warehouse corresponding to the selected manufacturing processing apparatus from the manufacturing information file, and from the manufacturing processing apparatus that has finished processing the lot. A production management method, comprising: transporting the product to a warehouse indicated by the warehouse name, and loading the product from the warehouse to a manufacturing processing apparatus capable of processing in the next manufacturing process.