JP2007102732A - Method and program for managing process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a program for managing processes for maintaining better quality. <P>SOLUTION: A management computer 21 of a process management server 20 records a lot number, a part number and a front-end part number and lot data including data regarding the lot number in a lot data storage part 31 as information regarding hierarchical relation between each lot. Then, lot trace processing for specifying a related lot related to a specific lot using the lot number, the part number and the front-end part number recorded in the lot data storage part 31 and tree structure based on the lot number is performed. Then, hold processing for holding use of the specific lot and the related lot is performed based on specifying the related lot using the tree structure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a process management method and a process management program, and more particularly to a process management method and a process management program for maintaining better quality.

  When doubts arise in quality, an initial survey for information sharing may be performed first, and then a factor survey may be performed by investigating manufacturing conditions and quality characteristics from finishing lots to raw material lots. Then, change points are extracted from the data arranged in time series, and the cause analysis and narrowing down are performed by judging the causal relationship with the content of doubt. Then, the factor verification is performed by verifying whether or not the suspicious content is reproduced by the narrowed-down factor by a reproduction experiment. Then, by collecting forms related to the process, equipment, inspection, etc. of the target range from raw materials to finishing, selecting the range (variety, lot) corresponding to the identified factor, inferring expandability, that is, narrowing down the range Do. Then, for the range narrowed down in this way, a pending notification to the actual thing is issued. Based on the hold notification, the person in charge rushes to each warehouse or each manufacturing site, and takes measures to put the actual product on hold.

On the other hand, a technique for managing a production line for manufacturing a product in units of lots through a plurality of processes has been developed (see, for example, Patent Document 1). In this patent document 1, the input time and discharge time of each process are calculated from the equipment operation start time, end time and defective product discharge time for each process, and change information on how to flow the product. A technique for reducing the input work man-hours is disclosed.
JP 2004-157741 A (Page 5-7)

  However, in response to the occurrence of the above-mentioned quality doubt, it takes time to collect information and input and totalize the collected data to a computer, and it takes a lot of time to narrow down the range from the initial investigation. In addition, when the person in charge goes to the site and performs the holding procedure based on the holding report output for the narrowed range, the holding procedure may take a long time. As a result, when the suspension treatment is delayed, a problematic product may be shipped or a problematic component may be introduced into the next process. Inviting such a situation may increase the damage.

  In addition, even if the number of man-hours for inputting information on input lots is reduced, if the information cannot be used efficiently at the time of the occurrence of quality doubt, it will still take a long time from initial investigation to narrowing down the scope. Can not reduce the time spent for.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a process management method and a process management program for maintaining better quality.

In order to solve the above problems, the invention described in claim 1 uses a process management server comprising a lot hierarchy data storage means for recording data relating to the hierarchy relation of lots using a lot identifier, and a management computer. A process management method for performing process management, wherein the management computer records information relating to a hierarchical relationship of each lot in the lot hierarchy data storage means, and a related lot related to a specific lot is stored in the lot hierarchy. A step of performing a lot tracing process using a tree structure based on data recorded in the data storage means, and using the specific lot and the related lot based on the specification of the related lot using the tree structure. The gist is to execute a holding process for holding.

  According to a second aspect of the present invention, in the process management method according to the first aspect, the process management server further includes lot manufacturing data storage means for recording information relating to manufacturing equipment and manufacturing time of each lot, and the management The computer records information on the manufacturing equipment and manufacturing time of each lot in the lot manufacturing data storage means, and searches for the lot based on the manufacturing equipment and manufacturing time recorded in the lot manufacturing data storage means. And executing the lot trace process and the hold process with the searched lot as the specific lot.

  According to a third aspect of the present invention, in the process management method according to the first or second aspect, the management computer displays the related lot specified by the lot trace processing, and the displayed related lot Accepting the selection by the user, and the holding process is executed for the specific lot and the selected related lot.

  The invention according to claim 4 is the process management method according to any one of claims 1 to 3, wherein the process management server includes a management reference condition relating to a range in which quality can be maintained, and a range of the management reference condition. And a reference condition data storage means for recording data related to a stricter notification condition, and the management computer satisfies the reference condition when a lot inspection result satisfies the notification condition. If the lot is deviated from the range of the management standard condition, the lot trace process and the hold process are executed with the lot deviating from the range of the management standard condition as the specific lot. Is the gist.

  According to a fifth aspect of the present invention, there is provided a process management for performing process management using a process management server comprising a lot hierarchy data storage means for recording data relating to a hierarchy of lots using a lot identifier and a management computer. A program, wherein the management computer records information relating to a hierarchical relationship of each lot in the lot hierarchy data storage means, and a related lot related to a specific lot is recorded in the lot hierarchy data storage means. Lot trace means for performing a lot trace process to be specified using a tree structure based on data, and for deferring use of the specific lot and the related lot based on the specification of the related lot using the tree structure The gist is to function as a holding means for performing a holding process.

  According to a sixth aspect of the present invention, in the process management program according to the fifth aspect, the process management server further comprises a lot production data storage means for recording information relating to production equipment and production time of each lot, and the management The computer further includes means for recording information on the manufacturing equipment and manufacturing time of each lot in the lot manufacturing data storage means, and the lots based on the manufacturing equipment and manufacturing time recorded in the lot manufacturing data storage means. The gist of the invention is to cause the lot trace processing and the hold processing to be executed with the searched lot as the specific lot while functioning as a search means.

  The invention according to claim 7 is the process management program according to claim 5 or 6, wherein the management computer further displays the related lot specified by the lot tracing process. The gist of the present invention is to function as a means for accepting selection by the user of the displayed related lot, and to execute the holding process for the specific lot and the selected related lot.

Invention of Claim 8 is the process management program as described in any one of Claims 5-7. WHEREIN: The said process management server is a management reference condition regarding the range which can maintain quality, and the range of the said control reference condition And further comprising reference condition data storage means for recording data relating to notification conditions, which are stricter conditions, and the management computer further comprising the reference condition when a lot inspection result satisfies the notification conditions. Functioning as a means for notifying a lot that satisfies the requirements, and when the range deviates from the range of the management standard condition, the lot that deviates from the range of the management standard condition as the specific lot, The gist is to execute the hold process.

(Function)
According to the first or fifth aspect of the invention, the management computer records information relating to the hierarchical relationship of each lot in the lot hierarchical data storage means. Then, a lot trace process for specifying a related lot related to a specific lot by using a tree structure based on data recorded in the lot hierarchy data storage means is performed. Then, based on the specification of the related lot using the tree structure, a holding process for holding the use of the specific lot and the related lot is performed. Thereby, a related lot having a hierarchical relationship with a specific lot can be specified, and the specific lot and the related lot can be put on hold. Therefore, when a defective lot is found, the use of the defective lot and a lot derived from this lot can be suspended.

  According to the second or sixth aspect of the invention, the management computer records information relating to the manufacturing equipment and manufacturing time of each lot in the lot manufacturing data storage means. Then, the lot is searched based on the manufacturing equipment and the manufacturing time recorded in the lot manufacturing data storage means. Then, the lot tracing process and the hold process are executed with the searched lot as a specific lot. Thereby, a lot can be searched based on manufacturing equipment and manufacturing time, and the use of the searched lot and this related lot can be put on hold. Therefore, the use of the lot specified based on the manufacturing equipment and the manufacturing time and the lot derived from this lot can be put on hold.

  According to the invention described in claim 3 or 7, the management computer displays the related lot specified by the lot trace process, and accepts the selection of the displayed related lot by the user. Then, a hold process is performed for the specific lot and the selected related lot. Thereby, it is possible to perform the hold process for the related lot selected by the user among the specified related lots. Therefore, only the related lot selected by the user among the lots searched as the specific related lot can be put on hold.

  According to the invention described in claim 4 or 8, when the inspection result of the lot satisfies the notification condition which is a stricter condition within the range of the management standard condition regarding the range in which the quality can be maintained, When a notification regarding a lot satisfying the notification condition is made and the range deviates from the range of the management standard condition, the lot trace process and the hold process are executed with the lot deviating from the range of the management standard condition as a specific lot. As a result, it is possible to prevent the lot from deviating from the range of the management standard condition, and when a lot that deviates from the range of the management standard condition is found, the lot that deviates from the range of the management standard condition. And the use of a lot derived from this lot can be put on hold.

  According to the present invention, better quality can be maintained.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. In the present embodiment, a case where it is applied to process management in the production of thermal paper will be described.
As shown in FIG. 1, the worker terminal 40 and the barcode reader-equipped terminal 50 are connected to the process management server 20 via a network 60.

The worker terminal 40 is a terminal used by the worker, and is used when performing processing results of preparation / coating, manufacturing conditions, process inspection, equipment inspection, inventory report, and the like.
The terminal 50 with a barcode reader is a portable terminal with a barcode reader that is used by an operator, and reports the results of each process and reports of material loading / unloading, input of raw materials into production, work in progress (Parts) are used for the next process and for checking at the time of product shipment. In the present embodiment, each raw material, work-in-process, and product is given a barcode that indicates a part number and a lot number.

  The process management server 20 includes a management computer 21. The management computer 21 includes a CPU, a RAM, a ROM, and the like (not shown), and performs processing to be described later. By executing the process management program for that purpose, the management computer 21 functions as an information registration unit, a lot trace unit, a hold treatment unit, a trend management unit, and the like.

  The information registration unit registers various information. The information registration unit records information on the hierarchical relationship of each lot in the lot data storage unit 31, thereby functioning as a hierarchy registration unit described in the claims.

  The lot trace unit identifies a related lot related to a specific lot by using a tree structure based on the data recorded in the lot data storage unit 31 and a lot within a time range based on equipment. Perform the process of narrowing down. The lot trace unit functions as a lot trace unit described in the claims by performing lot trace processing.

  When a quality defect is found, the hold processing unit performs a process for performing a hold process on a lot in which a quality defect is found or a lot derived from this lot. Based on the specification of the related lot using the tree structure, the hold processing unit performs a hold process for holding the use of the specific lot and a lot derived from the lot (related lot). It functions as the hold processing means described in the range.

The trend management unit performs a process for trend management on quality inspection results and manufacturing conditions.
The management computer 21 includes a lot data storage unit 31 as a lot hierarchy data storage unit and a lot manufacturing data storage unit, a reference condition data storage unit 32 as a reference condition data storage unit, an equipment data storage unit 33, and an inspection result data storage unit 34. It is connected to the.

  In the lot data storage unit 31, lot data 310 is recorded for each lot number and part number as a lot identifier. The lot data 310 includes data relating to a lot number, part number, equipment identifier, process date and time, previous process part number / lot number, status, and reason.

  In the lot number data area, data relating to the lot number as an identifier for identifying the lot is recorded. In the present embodiment, a lot refers to a group of parts (work in process) and products produced at one time. Raw materials are also managed in lot units.

  In the part number data area, data relating to the part number of the lot (raw material, work-in-process (part), product) is recorded. Each raw material, work-in-progress, and each product are assigned a part number as an identifier for identifying them.

In the equipment identifier data area, data relating to an identifier for specifying the equipment that produced the lot is recorded.
In the process date / time data area, data related to the process date / time (year / month / day and time) when this lot was produced in this equipment is recorded. In the production of thermal paper, in the production process from base paper to product, the date of manufacture and the range of processing start time are recorded as the process date. Further, in the production process from chemicals to coating liquids, the liquid feeding date and the liquid feeding time are recorded as the process date.

  In the previous process part number / lot number data area, data relating to the part number and lot number of a lot (raw material, work-in-process) used for production of the lot (work-in-process product, product) is recorded. When a plurality of lots (raw materials and work-in-process) are used, a plurality of previous process part numbers and lot numbers are recorded.

  In the status data area, data relating to the status of the lot is recorded. Specifically, for the raw material, one of “good”, “defective”, “expired”, and “hold 1” is recorded as the status. “Good products” are those that have passed acceptance inspection. A “defective product” is one that has failed acceptance inspection. “Expired” means that the warranty has expired. “Hold 1” is set as a hold when a quality problem caused by the raw material occurs. Here, it is assumed that only “non-defective products” can be dropped into production, and “defective products”, “expired” and “hold 1” cannot be dropped into production.

  For work-in-progress, one of “good”, “defective”, “expired”, “hold 1”, “hold 2” is recorded as the status. “Good” is a product that has passed the process inspection. The “defective product” is damaged at the manufacturing site. “Expired” means that the process inspection passed, but the residence time has expired. “Pending 1” is a case that is put on hold when a quality problem occurs, or that has not passed the process inspection and is determined to be undecided or impossible to process. “Pending 2” is a non-defective product that does not pass the process inspection but is subjected to some kind of treatment (such as removing a defective part in a subsequent process). In the manufacture of thermal paper, in the case of applying chemicals to paper, there is a case where a subsequent defective portion can be removed even if the process inspection fails, and in this case, “hold 2” is set. Here, “good product” and “hold 2” can be dropped into the next process, and “defective product”, “expired” and “hold 1” cannot be dropped into the next process.

  For the product, one of “good”, “defective”, “expired”, and “hold 1” is recorded as the status. “Good products” are those that have passed the final inspection. The “defective product” is damaged in the manufacturing warehouse. “Expired” means that the final inspection passed, but the storage has expired or the warranty has expired. “Hold 1” is set as a hold when a quality trouble occurs. Here, it is assumed that only “non-defective products” can be dropped, and “defective products”, “expired”, and “hold 1” cannot be shipped.

In the reason data area, when the status is “hold 1” or “hold 2”, data related to the hold reason is recorded.
In the reference condition data storage unit 32, manufacturing reference condition data 321 and inspection reference condition data 322 regarding the reference conditions of the manufacturing standard and the inspection standard are recorded. The manufacturing standard condition data 321 includes data on manufacturing standard items, manufacturing standards, manufacturing standard notification standards, management levels, management level notification standards, and fluctuation levels.

  In the manufacturing standard item data area, data related to manufacturing standard items is recorded. Specifically, for example, a line speed, a drying temperature, a tension, a roll peripheral speed, and the like are set as items of the manufacturing standard.

  In the manufacturing standard data area, data relating to the manufacturing standard is recorded for the manufacturing standard item. Specifically, for example, the manufacturing standard item “drying temperature” is set as “90 ± 10 (° C.)” as the manufacturing standard.

  In the manufacturing standard notification reference data area, data related to a notification standard when approaching the manufacturing standard is recorded. For example, when the temperature falls within a predetermined temperature range (for example, 1 ° C.) from the upper and lower limits of the manufacturing standard, the predetermined temperature is recorded as a notification target.

  In the management level data area, data relating to the management level is recorded for the manufacturing standard item. Specifically, for example, the production standard item “drying temperature” is set as “90 ± 7 (° C.)” as the management level. This management level is set under stricter conditions than the manufacturing standard.

  In the management level notification standard data area, data related to a notification standard when approaching the management level is recorded. For example, when the temperature falls within a predetermined temperature range (for example, 1 ° C.) from the upper and lower limits of the management level, the predetermined temperature is recorded as a notification target.

  In the fluctuation level data area, data relating to the fluctuation level is recorded for the manufacturing standard item. This fluctuation level is a continuous fluctuation situation to be notified. For example, the case where the value rises continuously a predetermined number of times is set as the fluctuation level to be notified.

The inspection standard condition data 322 includes data on inspection standard items, inspection standards, inspection standard notification standards, management levels, management level notification standards, and fluctuation levels.
In the inspection standard item data area, data relating to inspection standard items is recorded. Specifically, for example, an adhesion amount, a moisture value, an image density, a particle size, and the like are set as items of the inspection standard.

  In each of the data areas of the inspection standard, inspection standard notification standard, management level, management standard notification standard, and variation level, values for this inspection standard item are respectively set as in the case of the manufacturing standard condition data 321. Yes.

  In the equipment data storage unit 33, data relating to manufacturing conditions such as the state of equipment is recorded. Specifically, when measuring manufacturing conditions, equipment identifiers, part numbers, manufacturing condition items (line speed, drying temperature, tension, roll peripheral speed, etc.), measurement date and time, and measurement values of manufacturing conditions are recorded. In the inspection result data storage unit 34, data relating to the inspection result is recorded. Specifically, when an inspection result is obtained, a part number, a lot number, an inspection item (attachment amount, moisture amount, image density, particle size, etc.), an inspection date and an inspection result are recorded.

  Next, a processing procedure in the case of performing processing for suppressing damage caused by defective products using the system configured as described above will be described with reference to FIGS. Here, the derived lot collective hold process (FIG. 4), the designated range collective hold process (FIG. 5), and the trend management process (FIG. 6) will be described separately.

(Derived lot collective processing)
First, with reference to FIG. 4, a derived lot collective hold process in which a hierarchy is traced based on a lot number and a part number, a derived lot (part number, lot number) is specified, and collective hold processing is performed for the derived lot will be described. .

As shown in FIG. 4, the management computer 21 first specifies the part number / lot number of a specific lot as a search base point (step S1-1). Specifically, for example, the part number / lot number is specified based on the part number / lot number of the lot in which a defect has occurred, which is input by an operator (user) on the search screen. Then, the lot data storage unit 31 is searched by this part number / lot number.

  Next, the management computer 21 expands the tree and tracks the hierarchy (step S1-2). Specifically, first, the operator selects and inputs on the search screen whether the search is performed in the direction from the raw material to the product or in the direction from the product to the raw material. The search from the raw material to the product direction is performed when a derived lot is searched from a specific lot. The search from the product to the raw material direction is performed when a lot that causes a quality defect is searched for from the lot in which the quality defect is found.

  When performing a search in the direction from the raw material to the product, the management computer 21 first searches for the previous process part number / lot number in the lot data storage unit 31 based on the input part number / lot number, and the searched lot data 310 To extract. Then, the previous process part number / lot number in the lot data storage unit 31 is searched based on the extracted part number / lot number of each lot data 310, and the searched lot data 310 is extracted. This is repeated to search from the lot of the input part number / lot number to the lot of the product.

  On the other hand, when searching in the direction from the raw material to the product, the management computer 21 first extracts the previous process part number / lot number of the lot data 310 of the input part number / lot number. Then, the part number and lot number of the lot data storage unit 31 are searched based on the previous process part number / lot number, and the searched lot data 310 is extracted. Then, the part number and lot number of the lot data storage unit 31 are searched based on the previous process part number / lot number of each extracted lot data 310, and the searched lot data 310 is extracted. This is repeated to search from the lot of the input part number / lot number to the lot of the raw material.

  Then, the management computer 21 transmits data related to the search result to the worker terminal 40. The worker terminal 40 receiving this displays the search result (step S1-3). In this search result screen, the searched lot numbers are displayed in a tree according to the association of the part number / lot number, and the part number is displayed in association with each lot number. By selecting each lot number and requesting display of processing results, inspection results, and manufacturing conditions, the processing results, inspection results, and manufacturing conditions are displayed. Specifically, the processing results are displayed based on the equipment identifier and the process date and time of the lot data 310 specified by the part number and the lot number. The inspection result is displayed based on the inspection result data extracted from the inspection result data storage unit 34 by the part number and the lot number. The manufacturing conditions are displayed based on the equipment data extracted from the equipment data storage unit 33 based on the equipment identifier and the process date and time of the lot data 310 specified by the part number and the lot number. The worker confirms these indications and examines the lots to be subject to the pending treatment.

  Then, the worker uses the worker terminal 40 to select a lot number that is determined to be put on hold, inputs a hold reason, and gives a hold instruction. The worker terminal 40 transmits hold instruction data including the selected lot number and part number and the hold reason to the management computer 21. When the hold instruction data is received (YES in step S1-4), the management computer 21 performs a process for performing a collective hold process on the derived lot (step S1-5). Specifically, the lot data storage unit 31 is searched based on the lot number and part number in the received hold instruction data, and “hold 1” is stored in the status data area of the searched lot data 310 and the reason data area is held. Record the holding reason in the instruction data.

With regard to the data in which “pending 1” is recorded as the status of the lot data 310, the raw materials, work-in-process items, and products are input to manufacturing, input to the next process, input to manufacturing at the time of shipment, and next process. Cannot be put into or shipped from. Specifically, first, the raw materials, work-in-progress, and products are each input into production, input into the next process, and at the time of shipment, the worker uses the bar code reader terminal 50 to make each raw material, work-in-process, and product. Read the barcode attached to. Then, the bar code reader-equipped terminal 50 transmits the part number and lot number indicated by the bar code to the management computer 21. The management computer 21 searches the lot data storage unit 31 by this part number and lot number. When the status of the searched lot data 310 is “pending 1”, the manufacturing computer, the input to the next process, and the shipment are performed. Error data indicating the failure is transmitted to the terminal 50 with the barcode reader. Even when the status is “defective product” or “expired”, error data is similarly transmitted to the terminal 50 with barcode reader. Upon receiving this error data, the bar code reader-equipped terminal 50 emits a warning sound and displays that it cannot be put into production, put into the next process, or shipped. The worker confirms this, and cancels the input to the production of each raw material, work-in-process, and product, the input to the next process, and the shipment.

  In the case where collective hold is not performed, the worker inputs on the worker terminal 40 that no hold action is performed, and the worker terminal 40 transmits this instruction to the management computer 21. If this is received (NO in step S1-4), the management computer 21 ends this process.

(Specified range batch hold processing)
Next, the designated range collective hold processing for narrowing down lots within a certain time range based on equipment and applying the hold treatment to the narrowed lots will be described with reference to FIG.

  In the designated range collective hold processing, a lot that falls within a specific time range is searched based on equipment. With respect to the retrieved lots and the derived lots of the retrieved lots, a hold process is performed collectively.

  As shown in FIG. 5, the management computer 21 first specifies the facility and the time range (step S2-1). Specifically, a worker (user) uses the worker terminal 40 to input a facility identifier, a part number, and a manufacturing date and time on the search screen and make a search request. The worker terminal 40 transmits data regarding the equipment identifier, the part number, and the manufacturing date and time to the management computer 21. The management computer 21 that has received this searches the lot data storage unit 31 based on the equipment identifier, the part number, and the manufacturing date and time, and extracts the lot number (step S2-2).

  Then, the management computer 21 transmits to the worker terminal 40 a search result screen of a specified range for displaying this search result. The worker terminal 40 that has received this displays this search result screen (step S2-3). In this search result screen, the equipment identifier, part number, production date and time, and the searched lot number are displayed. By selecting each lot number and requesting the display of processing results, inspection results, and production conditions, The processing results, inspection results, and manufacturing conditions are displayed. Specifically, these displays are performed in the same manner as in step S1-3. The worker confirms these displays, and first considers whether or not to perform collective hold processing for the derived lot of the lot in the specified range (step S2-4).

  When performing a collective hold action for a derived lot of a lot in a specified range (YES in step S2-4), first of all the lot numbers displayed on the search result screen for the specified range, Select the lot number to be examined. Then, the management computer 21 performs the processes of steps S1-2 and S1-3 for the selected lot number.

The user checks the tree display of the lot number displayed on the search result screen of the derived lot,
Further, the processing results, inspection results, and manufacturing conditions linked to the display of each lot number are confirmed, and the derived lots to be subjected to the collective hold processing are examined.

  Then, with respect to the derived lots to be subjected to collective hold processing, a lot number is selected on the derived lot search result screen, and a hold instruction is issued. Here, if the same batch hold action is applied to the derived lot for the specified lot among the lots in the specified range search result, the same batch hold is also applied to the derived lot of each lot specified in the specified range search result screen. It is possible to specify that treatment is to be performed. Specifically, the worker selects a lot number that is the target of the pending treatment among the lots displayed on the search result screen of the specified range, and selects one of the lots to display a tree structure indicating the derived lot. Display and select the derivative lot to be held. Then, an instruction to perform a hold process in the same manner is input for the derived lot of the designated lot among the search results in the designated range. Further, the worker inputs the reason for the suspension. In this case, the worker terminal 40 stores the lot number / part number specified on the search result screen of the specified range, the lot number / part number of the derived lot specified on the search result screen of the derived lot, and data on the reason for holding. The holding instruction data including it is transmitted to the management computer 21.

  The management computer 21 that has received this, based on the hold instruction data, performs a process for performing a batch hold process on the designated lot of the designated range and the designated lot of the lots derived therefrom. It performs (step S2-7). Specifically, first, the lot data storage unit 31 is searched by the lot number / part number specified on the search result screen of the specified range in the hold instruction data, and “hold” is stored in the status data area of the searched lot data 310. 1 ”, the reason for holding in the holding instruction data is recorded in the reason data area. Further, the previous process part number / lot number in the lot data storage unit 31 is searched based on the lot number / part number, and the part number of the searched lot data 310 is the part number of the designated derived lot in the hold instruction data. If there is, “hold 1” is recorded in the status data area of the lot data 310, and the hold reason in the hold instruction data is recorded in the reason data area. Then, this process is repeated from the lot designated on the search result screen of the designated range in the hold instruction data to the product lot.

  On the other hand, when the collective hold processing is not performed on the derived lot of the designated range lot (in the case of NO in step S2-4), the operator examines whether to perform the collective hold processing on the lot of the specified range search result. .

  When performing collective hold, the worker selects a lot number to be put on hold on the designated range search result screen, inputs a hold reason, and gives a hold instruction. The worker terminal 40 transmits hold instruction data including the part number, the selected lot number, and the hold reason to the management computer 21. When this is received (in the case of YES in step S2-5), the management computer 21 performs a process for performing collective hold processing for the lot in the specified range (step S2-6). Specifically, the lot data storage unit 31 is searched based on the lot number and part number of the received hold instruction data, “hold 1” is stored in the status data area of the searched lot data 310, and the hold instruction is stored in the reason data area Record each hold reason in the data.

  On the other hand, when the collective hold is not performed, the worker inputs on the worker terminal 40 that the hold action is not performed, and the worker terminal 40 transmits this instruction to the management computer 21. If this is received (NO in step S2-5), the management computer 21 ends the designated range batch suspension process.

In the case of “pending 1” recorded as the status of the lot data 310, as in the case of the derived lot batch holding process, the raw materials, work-in-progress, and products are input to manufacturing and input to the next process, respectively. When the barcode attached to each raw material, work-in-progress, or product is read at the time of shipment, it cannot be input into production, input into the next process, or shipment.

(Trend management processing)
Next, a trend management process for performing trend management on manufacturing conditions and quality inspection results will be described with reference to FIG.

  In this trend management procedure, trend management is performed based on information on manufacturing conditions and quality inspection results, and an alarm is notified when a response is required. Furthermore, a chart relating to trend management is automatically created based on information on quality inspection results and manufacturing conditions. Further, when the manufacturing standard or the inspection standard is deviated, a batch holding process is applied to the target lot and a lot derived from the lot. First, a case where trend management is performed for manufacturing conditions will be described.

  As shown in FIG. 6, the management computer 21 first acquires measurement data (step S3-1). Here, as for the manufacturing conditions, data relating to the manufacturing conditions of the manufacturing equipment is acquired and recorded in the equipment data storage unit 33. Specifically, the value of the measured manufacturing condition is recorded in association with the equipment identifier, the part number, the manufacturing condition item, and the measurement date and time.

  Then, the management computer 21 acquires the reference condition (Step S3-2). Specifically, based on the manufacturing condition item of the measurement data recorded in the equipment data storage unit 33, the manufacturing standard item of the manufacturing reference condition data 321 in the reference condition data storage unit 32 is searched, and the manufacturing reference condition data 321 is obtained. Extract.

  Then, the management computer 21 checks whether or not the measurement data value deviates from the standard range (step S3-3). Specifically, the measurement value of the manufacturing condition in the measurement data is compared with the manufacturing standard of the manufacturing reference condition data 321.

  If the value is out of the standard range (YES in step S3-3), the management computer 21 specifies the target lot (step S3-7). As for manufacturing conditions, the equipment identifier, part number, and process date and time of the lot data storage unit 31 are searched based on the manufacturing equipment (equipment identifier), part number, and measurement date and time in the measurement data. Here, the process date / time is within a predetermined range before and after the measurement date / time (for example, within the measurement date / time or current date / time range that is no longer within the standard range from the measurement date / time before going out of the standard range). To do. Then, the lot number and part number of the searched lot data 310 are extracted.

Then, a process for performing a collective hold process on the retrieved part number, the lot with the lot number, and the derived lot of this lot is performed (step S3-8). Specifically, the management computer 21 first notifies the worker terminal 40 of notification data for notifying that the manufacturing standard is out of range. This notification data is associated with the search result screen for the manufacturing equipment (equipment identifier), the part number, the lot specified based on the measurement date and time, and the derived lot of this lot. When the display request for this search result screen is made, the management computer 21 searches for the manufacturing equipment (equipment identifier), the part number, the lot specified based on the measurement date and time in the measurement data, and the derived lot of this lot. The search result screen is displayed on the worker terminal 40. In this search result screen, the lot number is displayed for the lot specified based on the manufacturing equipment (equipment identifier), the part number, and the measurement date / time in the measurement data, and the lots derived from these lots are displayed as the part number / lot. A tree is displayed according to the number association. The worker confirms the search result, and if it is necessary to perform a collective hold process on the specified lot and a derived lot of this lot, the worker instructs the collective hold process for the derived lot. In this case, the management computer 21 performs a process for performing a collective hold process on the identified lot and a derived lot of this lot, similarly to the process of step S2-7. In addition,
In the case where the collective hold process is not performed for the derived lot, the process for performing the collective hold process for the lot specified in step S3-7 is performed.

  On the other hand, if the measurement data is within the standard range (NO in step S3-3), the management computer 21 checks whether the measurement data has reached the notification standard (step S3-4). Specifically, with regard to the manufacturing conditions, first, the management level notification obtained from the management level of the manufacturing standard condition data 321 and the management level notification standard for the measurement value of the manufacturing data recorded in the equipment data storage unit 33 is obtained. Compare with the reference value. Then, when the measurement value of the manufacturing condition of the measurement data has reached the management standard standard value, it is determined that the notification standard has been reached. If it is determined that the notification standard is reached, the measurement value of the manufacturing condition of the measurement data is compared with the manufacturing standard notification standard value obtained from the manufacturing standard of the manufacturing standard condition data 321 and the manufacturing standard notification standard, and the manufacturing standard If the notification reference value has been reached, that fact is to be notified. Further, when the measurement value of the manufacturing condition of the measurement data deviates from the management level, the fact is set as a notification target. Further, if the fluctuation level of the measurement data has reached the fluctuation level based on the history of measurement values of the manufacturing conditions of the measurement data, it is determined that the notification standard has been reached. For example, when the variation level is set as a notification target when the value rises continuously for a predetermined number of times, the notification criterion is reached when the measurement value of the manufacturing condition rises continuously for a predetermined number of times. Is determined.

  If the measurement data has reached the notification standard (YES in step S3-4), the target lot is specified (step S3-5). Specifically, the facility identifier and process date in the lot data storage unit 31 are searched based on the facility identifier and the measurement date in the measurement data. Here, the process date / time is within a predetermined range before and after the measurement date / time (for example, within the measurement date / time or current date / time range that is no longer within the standard range from the measurement date / time before going out of the standard range). To do. Then, the lot number and part number of the searched lot data 310 are extracted.

  And an alarm is notified to the worker terminal 40 about the specified lot (step S3-6). Specifically, the specified part number and lot number, the items and values that have reached the notification criteria, and the link information to the trend management chart automatically created by the management computer 21 regarding the items that have reached the notification criteria. To the worker terminal 40.

The worker who has received the alarm notification confirms the notified part number and lot number, examines the response with reference to the trend management chart, and performs the necessary response.
On the other hand, if the measurement data does not reach the notification standard (NO in step S3-4), the process ends.

  Next, a case where trend management is performed on the quality inspection result will be described. The trend management for the quality inspection results will be described with reference to FIG. 6 as in the trend management for the manufacturing conditions. Since the outline of the processing procedure is the same as the trend management for the manufacturing conditions described above, only a specific process different from the trend management for the manufacturing conditions will be described here.

  As for the inspection result, when the inspection result is obtained in step S 3-1, data regarding the acquired inspection result is recorded in the inspection result data storage unit 34. Specifically, data relating to the obtained inspection result is recorded in association with the part number, lot number, inspection item, and inspection date and time. In step S3-2, based on the inspection item of the measurement data recorded in the inspection result data storage unit 34, the inspection standard item of the inspection standard condition data 322 in the reference condition data storage unit 32 is searched, and the inspection standard condition Data 322 is extracted. In step S3-3, the value of the inspection result in the measurement data is compared with the inspection standard of the inspection reference condition data 322.

  If it is out of the standard range (in the case of YES in step S3-3), the lot in the lot data storage unit 31 is determined based on the part number and lot number in the measurement data (inspection result data) in step S3-7. Data 310 is searched.

  In step S 3-8, the management computer 21 first notifies the worker terminal 40 of notification data for notifying that the inspection standard is out of range. This notification data is associated with the search result screen for the lot specified based on the part number and lot number in the measurement data (inspection result data) and the derived lot of this lot. When this search result screen display request is made, the management computer 21 searches for the lot specified based on the part number and lot number in the measurement data (inspection result data) and the derived lot of this lot, and the above steps The search result screen similar to S1-3 is displayed on the worker terminal 40. The worker confirms the search result, and if it is necessary to perform a collective hold process for a lot outside the standard range and a derived lot of this lot, the operator instructs the collective hold process. In this case, the management computer 21 performs the same process as the process of step S1-5. In the case where the collective holding process is not performed for the derived lot, the holding process is performed for the lot outside the standard specified in step S3-7.

  On the other hand, if the measurement data is within the standard range (NO in step S3-3), in step S3-4, the measurement data (inspection result data) and the inspection reference condition data 322 are used to manufacture the above manufacturing conditions. Check if the notification criteria have been met in the same way as for.

  If the measurement data has reached the notification standard (YES in step S3-4), the lot data storage unit 31 is based on the part number and lot number in the measurement data (inspection result data) in step S3-5. The lot data 310 is searched, and the target lot is specified. In step S3-6, an alarm is notified to the worker terminal 40 for the specified lot as in the above case.

As described above, according to the present embodiment, the following effects can be obtained.
In the above embodiment, the management computer 21 records the lot data 310 including the data relating to the lot number, the part number, and the previous process part number / lot number in the lot data storage unit 31 as information relating to the hierarchical relationship of each lot. Then, a lot trace process is performed to identify a related lot related to a specific lot using a tree structure based on a lot number, a part number, and a previous process part number / lot number recorded in the lot data storage unit 31. Then, based on the specification of the related lot using this tree structure, a holding process for holding the use of the specific lot and the derived lot (related lot) of this lot is performed. Thereby, a related lot having a hierarchical relationship with a specific lot can be specified, and the use of this specific lot and a derived lot of this lot can be suspended. Therefore, when a defective lot is found, the use of the defective lot and a lot derived from this lot can be suspended.

  In the above embodiment, the management computer 21 records information on the equipment identifier and the production time (process date and time) of the production equipment of each lot in the lot data storage unit 31. Then, the lot is searched based on the equipment identifier and the process date and time recorded in the lot data storage unit 31. Then, the lot tracing process and the hold process are executed with the searched lot as a specific lot. Thereby, a lot can be searched based on manufacturing equipment and manufacturing time, and the use of the searched lot and this related lot can be put on hold. Therefore, the use of the lot specified based on the manufacturing equipment and the manufacturing time and the lot derived from this lot can be put on hold.

  In the above embodiment, the management computer 21 displays the related lot specified by the lot trace process and accepts the selection of the displayed related lot by the user. Then, a hold process is performed for the specific lot and the selected related lot. Thereby, it is possible to perform the hold process for the related lot selected by the user among the specified related lots. Therefore, only the related lot selected by the user among the lots searched as the specific related lot can be put on hold.

  In the above embodiment, when the lot inspection result satisfies the notification standard, the management computer 21 notifies the lot that satisfies the notification standard. When the management computer 21 deviates from the standard range, Lot trace processing and hold processing are executed with a lot that deviates from the specified lot as a specific lot. As a result, it is possible to prevent the lot from deviating from the standard range, and when a lot deviating from the standard range is found, the lot deviating from the standard range and this lot are derived. Lot usage can be put on hold.

In addition, you may change the said embodiment into the following aspects.
In the above-described embodiment, the search result is displayed on the worker terminal 40, the lot to be reserved is identified based on the selection by the worker, and the processing for performing the hold treatment collectively is performed. Instead of this, a process for automatically performing a collective hold process for a specific lot and a lot derived from this lot may be performed. For example, in the collective hold treatment in step S3-8 in the trend management process of the above embodiment, a process for automatically performing the collective hold action is performed. Then, after performing the process for performing the collective hold action, the operator may examine whether to release the hold, and if there is no need for the hold, the hold may be released individually. Specifically, the status of the lot data storage unit 31 is changed. As a result, when a quality defect is found, a pending treatment can be performed earlier for a lot where a quality defect is found and a lot derived therefrom.

  In the above embodiment, each raw material, each work-in-process, each product lot is assigned a barcode indicating the part number and lot number, and this bar code is used to input the raw material into production and work-in-progress (parts) ) Was put into the next process, and a check was made regarding the suspension treatment at the time of product shipment. If such a check can be made, the means for presenting the part number and lot number assigned to each lot is not particularly limited, and for example, RFID may be used.

  In the above embodiment, the present invention is applied in the process management of thermal paper production. However, the present invention is not limited to this, and the present invention can be applied in process management of production of various products.

1 is a schematic diagram of a system according to an embodiment of the present invention. Explanatory drawing of the data recorded on the lot data storage part. Explanatory drawing of the data recorded on the reference condition data storage part. Explanatory drawing of the process sequence of one Embodiment of this invention. Explanatory drawing of the process sequence of one Embodiment of this invention. Explanatory drawing of the process sequence of one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 20 ... Process management server, 21 ... Management computer, 31 ... Lot data storage part as lot hierarchy data storage means and lot manufacturing data storage means, 32 ... Reference condition data storage part as reference condition data storage means.

Claims (8)

A process management method for performing process management using a process management server comprising a lot hierarchy data storage means for recording data relating to the hierarchical relationship of lots using a lot identifier, and a management computer,
The management computer is
Recording information on the hierarchical relationship of each lot in the lot hierarchy data storage means;
Performing a lot trace process for identifying a related lot related to a specific lot using a tree structure based on data recorded in the lot hierarchy data storage means;
And a holding process for holding the specific lot and the use of the related lot based on the specification of the related lot using the tree structure. The process management server further comprises lot production data storage means for recording information relating to the production equipment and production time of each lot,
The management computer is
Recording information on the production equipment and production time of each lot in the lot production data storage means;
A step of searching for a lot based on the manufacturing equipment and the manufacturing time recorded in the lot manufacturing data storage means;
The process management method according to claim 1, wherein the lot trace process and the hold process are executed with the searched lot as the specific lot. The management computer displaying the related lots identified by the lot trace process;
Further accepting a user selection of the displayed associated lot;
The process management method according to claim 1, wherein the holding process is executed for the specific lot and the selected related lot. The process management server further includes a reference condition data storage unit that records data related to a management reference condition relating to a range in which quality can be maintained and a notification condition that is a stricter condition within the range of the control reference condition,
The management computer is
When the inspection result of the lot satisfies the notification condition, a notification regarding the lot that satisfies the reference condition is performed,
2. The lot trace process and the hold process are executed when a deviation from the range of the management reference condition is set as the specific lot as the specific lot. Process control method as described in any one of -3. A process management program for performing process management using a process management server comprising a lot hierarchy data storage means for recording data relating to the hierarchical relationship of lots using a lot identifier, and a management computer,
The management computer,
Recording information on the hierarchical relationship of each lot in the lot hierarchy data storage means;
Lot trace means for performing a lot trace process for specifying a related lot related to a specific lot using a tree structure based on data recorded in the lot hierarchy data storage means;
A process management program that functions as a holding unit that performs a holding process for holding the specific lot and the use of the related lot based on the specification of the related lot using the tree structure. The process management server further comprises lot production data storage means for recording information relating to the production equipment and production time of each lot,
The management computer further
Means for recording information on the production equipment and production time of each lot in the lot production data storage means;
Based on the production equipment and production time recorded in the lot production data storage means, function as a means for searching for a lot,
6. The process management program according to claim 5, wherein the lot trace process and the hold process are executed with the searched lot as the specific lot. The management computer further
Means for displaying a related lot identified by the lot tracing process by the management computer;
Function as a means of accepting a user selection of the displayed associated lot;
The process management program according to claim 5 or 6, wherein the holding process is executed for the specific lot and the selected related lot. The process management server further includes a reference condition data storage unit that records data related to a management reference condition relating to a range in which quality can be maintained and a notification condition that is a stricter condition within the range of the control reference condition,
The management computer further
When the inspection result of the lot satisfies the notification condition, it functions as a means for notifying the lot that satisfies the reference condition,
6. The lot trace process and the hold process are executed when the deviation from the range of the management reference condition is set as the specific lot that is out of the range of the management reference condition. The process management program as described in any one of -7.

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