JP5068684B2 - Work management system and work management method - Google Patents

Description

  The present invention relates to a work management system and a work management method for managing time related to work divided into a plurality of work processes, and in particular, determining whether the work waiting time is caused by component acquisition timing.

  Conventionally, for the production of products, for example, many so-called mass production methods for mass production at one time have been adopted. This mass production method is effective in reducing the cost per unit product, but on the other hand, if the number of sales is less than planned, it will have a lot of inventory, or multiple work processes. There is a problem that various wastes occurring in the process (such as variations in work time for each work process) cannot be found or eliminated.

  Therefore, in recent years, a so-called JIT (Just In Time) production system in which a necessary product is provided to a necessary place in a necessary amount when necessary is being adopted. According to this JIT production method, there is no problem of having a large stock. However, since the JIT production method is originally less efficient than the mass production method, it is necessary to reduce various work wastes and improve the work efficiency in order to improve the production efficiency.

For example, in Patent Document 1, an IC tag for identifying a worker to be carried by an operator and an IC tag for identifying a work target for identifying a work target article are read by an IC tag reader (reader), and the read information A technique for managing work time by transmitting information specifying a work area and operation information of work equipment in the work area to a performance management CPU is disclosed.
JP 2005-182656 A

  However, in the technique disclosed in Patent Document 1, when there are a plurality of work object specifying IC tags in one work area, information such as how much time it took for which work is accurately grasped. Problems such as being unable to do so.

In addition, a work waiting state occurs in a work divided into a plurality of work processes. However, the current situation is that the degree of work waiting and the cause of this work waiting state are not fully investigated. In addition, if a state that can be considered as a loss time among the waiting time for work can be grasped, a work plan for improving work efficiency can be created. Furthermore, if it is possible to grasp the cause of the waiting time for work due to the lack of parts among the parts required for work, a work plan for further improving work efficiency Leads to creating.

  The present invention has been made in order to solve the above-described problems, and relates to work divided into a plurality of work processes, not only managing the time for each work process and extracting the loss time, but also in the work process. Collect the timing of procurement of necessary parts and the timing of distributing parts to each work process (hereinafter referred to as parts acquisition timing), and how the parts acquisition timing is related to the waiting time for work. It is an object of the present invention to provide a work management system and a work management method for visualization and computer management.

In order to achieve the above object, the work management system according to the present invention divides a predetermined work on a work object into a plurality of work processes, and the plurality of work processes are performed in separate work spaces, and the work is performed. The time related to the work delay of the worker in the space, the work instruction with the first IC tag to which the information for identifying the work content is written, and the information on the parts used for the work in the work space are written. A product slip for each part with the second IC tag attached thereto and the first IC attached to the work instruction when the work instruction is brought into the work space and installed in the work space. A first reader used to read tag information and a place where the preparation work for the part is performed, and each part is ready to be sent to the work space Using a second reader used to read information on the second IC tag attached to the product tag corresponding to the ready part, and an information processing device for processing information on the work When the information processing apparatus receives information on the first IC tag attached to the work instruction from the first reader, the information processing apparatus prepares the component from the received reading time of the first IC tag. A reference time is calculated by subtracting a predetermined time in consideration of the movement time of the part between the place where the work is performed and the work space, stored in the storage unit, and ready to send the part from the second reader When the information of the second IC tag attached to the actual product slip transmitted every time it is made is received, the read time of each received second IC tag is stored in the storage unit and stored in the storage unit Read the reading time of each second IC tag When the preparation time is later than the reference time by comparing the reference time stored in the storage unit with each of the preparation times, and when the preparation time is later than the reference time, It is characterized by determining that there is a relationship with a delay in preparation.

  According to the present invention, regarding work divided into a plurality of work processes, not only the time for each work process is managed and the time for waiting for work is extracted, but also whether the work waiting time is due to the component acquisition timing or not. Can be determined.

The present invention is to promote optimization of production activities (quality improvement activities) by visualizing and visualizing waiting time and dead time (loss time) while suppressing IT investment at the manufacturing site. In other words, in the work divided into multiple work processes, visualization of work waiting time and waste time is performed, it is determined whether the cause of work waiting time and waste time is due to parts acquisition timing, It is to provide an IT system that can be linked to activities that can realize profit expansion.
Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an overall configuration diagram of a work management system according to the present embodiment. The work management system SS includes a work space 10 having a work management terminal B11 and a work management terminal B12, a work space 20 having a work management terminal B21 and a work management terminal B22, and a work having a work management terminal B31 and a work management terminal B32. A space 30, an instruction issuing terminal 50, a database server (information processing apparatus) 60, an administrator terminal 70, and a reader / writer 200 are configured. The work management terminals B11, B12, B21, B22, B31, B32, the instruction issuing terminal 50, the database server 60, the administrator terminal 70, and the reader / writer 200 are connected by a network 40 such as a LAN (Local Area Network). . A work management terminal B101 (see FIG. 4) and a work management terminal B102 installed in a parts warehouse or the like are also connected by a network 40 such as a LAN.

  Here, the work related to the work W, which is a work object (also referred to as a product), is divided into three work processes (processes W01 to W03, also simply referred to as “processes”), and work space 10 to work space 30 respectively. The case where it carries out by is demonstrated. Note that the number of work steps is not limited to three, but may be any number as long as it is two or more. The work related to the workpiece W is, for example, a work for assembling a semiconductor component to the circuit board, but other work may be used. Also, it is assumed that the paired work W and work instruction 80 are carried together.

  The instruction issuing terminal 50 is a terminal that issues an instruction when work is required, and registers the work content in the storage unit 62 of the database server 60. The issued instructions include a work instruction 80, a movement instruction 90, and a setup instruction 110 (see FIG. 4). The work instruction 80 is an instruction for an operator to perform assembly work. In order to perform this work, a movement instruction 90 (also referred to as a transportation instruction) is issued for performing work for moving a semi-finished product or the like to the work space. The person in charge of the arrangement or the person in charge of transportation carries out the transportation work according to the movement instruction 90. The setup instruction 110 is an instruction for performing the setup work. Specifically, in order to perform the assembly work, even if there is only the target work W, the work cannot be performed. It is a work instruction for aligning nuts and parts. In terms of management accounting, it is also an order for generating costs and managing costs.

  The instruction issuing terminal 50 includes a processing unit 51, a keyboard 53, a display device 54, a reader / writer 55 for an IC tag, and a printer 56. The processing unit 51 includes an instruction issuing unit 52 that issues instructions. In response to an instruction from the issuing unit 52, each instruction (work instruction 80, moving instruction 90, and setup instruction 110) is output by a printer 56 having a rewritable function for rewritable. Further, the reader / writer 55 writes information for specifying the work in the work specifying IC tag 81 in accordance with an instruction from the instruction issuing unit 52. The information for specifying the work is, for example, a work order number, a product / semi-product number, and the number of workers. The work identification IC tag 81 uses a non-contact wireless IC tag such as RFID (Radio frequency identification) and is attached to the document of the work instruction 80. Similarly, a movement specifying IC tag 91 is attached to the movement instruction 90, and a setup specifying IC tag 111 is attached to the setup instruction 110 (see FIG. 4).

  The reader / writer 200 reads the component identification IC tag 120 (see FIG. 4) affixed to the actual product slip (see FIG. 4) corresponding to the component when aligning the screws, nuts, and components used for assembly. The database server 60 is notified of the read component information. Note that the reader / writer 200 may be stationary or portable. Communication from the reader / writer 200 to the database server 60 may be wired or wireless.

  The work space 10 to the work space 30 are spaces where the worker performs work for each work process. The work space 10 to the work space 30 may be arranged far away depending on the work content. When the work space for each process is separated, the person in charge of the arrangement or the person in charge of transportation conveys the workpiece W according to the instruction of the movement instruction 90. Here, after the circuit boards into which electronic parts and the like are automatically inserted are sorted (process W01), they are soldered in a solder reflow furnace (process W02), and the soldered semi-finished product is finished as a manual work. The flow of assembling (process W03) will be described as an example.

  The work space 10 includes a first stock area 11, a second stock area 12, work management terminals B 11 and B 12, and a display 13 that displays information related to work on the work W. The worker 17 is a person who performs work in the work space 10. The first stock area 11 is a place where the work W before work is placed. The work management terminal B11 is installed in the vicinity of the first stock area 11. The second stock area 12 is a place where the work W after work is placed. The work management terminal B12 is installed in the vicinity of the second stock area 12. Specifically, in the process W01 in the work space 10, the circuit board placed in the first stock area 11 is sorted and placed in the second stock area 22.

  The work space 20 includes a first stock area 21, a second stock area 22, work management terminals B 21 and B 22, and a display 23 that displays information related to work of the work W. The worker 27 is a person who performs work in the work space 20. The first stock area 21 is a place where the work W before work is placed. The work management terminal B21 is installed in the vicinity of the first stock area 21. The second stock area 22 is a place where the work W after work is placed. The work management terminal B22 is installed in the vicinity of the second stock area 22. Specifically, in the process W02 in the work space 20, the circuit board placed in the first stock area 21 is soldered in a solder reflow furnace and then placed in the second stock area 22. To do.

  The work space 30 includes a first stock area 31, a second stock area 32, work management terminals B 31 and B 32, a display 33 that displays information related to the work of the work W, and parts in which parts necessary for assembly work are stored. A box 34 and a switch 35 for notifying the progress of work are provided. The worker 37 is a person who performs work in the work space 30. The first stock area 31 is a place where the work W before work is placed. The work management terminal B31 is installed in the vicinity of the first stock area 31. The second stock area 32 is a place where the work W after work is placed. The work management terminal B32 is installed in the vicinity of the second stock area 32. Specifically, in the process W03 in the work space 30, the circuit board placed in the first stock area 31 is manually assembled and placed in the second stock area 32. Details of the work space 30 will be described with reference to FIG.

  FIG. 2 is an external perspective view showing an example of a work table. This will be described with reference to FIG. The configuration of the work space differs depending on the work content, but here, the case of the work space 30 will be described as an example. In addition, the same code | symbol is attached | subjected to the structure same as FIG. 1, and duplication description is abbreviate | omitted suitably.

  As shown in FIG. 2, here, the work table 36 is formed in a semicircular shape, a plurality of parts boxes 34 are arranged on the outer side thereof, and a display device is located at the back of the front of the work position of the worker 37. 33 is installed. The work management terminal B31 and the work management terminal B32 are installed in the vicinity of the work position of the worker 37 on the work table 36.

  The work management terminal B31 includes a box B31a having a slot, and a reader / writer B31b that is attached to the side of the box B31a, reads an IC tag, and transmits the read information to the database server 60.

  The box B31a is a box for inputting an instruction. When the reader / writer B31b confirms communication with the IC tag when an instruction is input to the box B31a, the reader / writer B31b reads the information of the IC tag and specifies the communication start information with the IC tag and the work content in the database server 60. Send information and. The communication start information includes the ID of the work management terminal B31, the identification number of the IC tag, and the work start time. The information for specifying the work content includes, for example, the number (No) of the work instruction 80, the product number of the manufactured product / semi-finished product, and the number. When the reader / writer B31b confirms the disconnection of communication with the IC tag when the instruction is taken out from the box B31a, the reader / writer B31b notifies the database server 60 of the communication end information with the IC tag, the information for specifying the work content, Send. The communication end information includes the ID of the work management terminal B31, the identification number of the IC tag, and the communication end time. The information specifying the work content includes, for example, No in the work instruction 80, the product number of the manufactured / semi-finished product, and the number. Note that a plurality of instructions (a plurality of IC tags) may be inserted into the box B31a. As the instructions, there are a work instruction 80, a movement instruction 90, a setup instruction 110, and the like.

  The work management terminal B32 has the same configuration as that of the work management terminal B31, and is attached to the side of the box B32a having a slot and the box B32a, reads the IC tag, and transmits the read information to the database server 60. Writer B32b. Further, the other work management terminals B11, B12, B21, and B22 (see FIG. 1) have the same configuration as the work management terminal B31.

  The IC tag embedded in the instruction is preferably a battery-mounted type, for example, if it is a battery-less type that obtains power from the received radio wave because it is easy to achieve downsizing and cost reduction. May be. The timing at which the IC management information is read by the work management terminals B11, B12, B21, B22, B31, and B32 may be every predetermined time (for example, 10 seconds).

  Here, the work management terminal B32 is installed so as to be inclined so that the upper part is inclined toward the operator 37 so that the operator 37 can easily input instructions at the start of work or take out instructions at the end of the work. Has been. This makes it easy for the worker 37 to put in and take out instructions with respect to the work management terminal B32, and to check the presence or absence of instructions in the work management terminal B32.

  A first stock area 31 is provided on the left side of the work position by the worker 37, and a work case WC capable of storing a plurality of works W is placed thereon. Further, a second stock area 32 is provided on the right side of the work position by the worker 37. Here, it is assumed that a plurality of workpieces W stored in the work case WC correspond to one instruction. Further, the work case WC is not an essential configuration and may be omitted.

  When performing work related to the workpiece W, the worker 37 first takes out the work instruction 80 input to the work management terminal B31 and inputs the work instruction 80 to the work management terminal B32. Then, the work W is taken out from the work case WC placed in the first stock area 31 and moved to the work table 36, and the screen of the display 33 is viewed (the screen is switched by pressing the switch 35 as necessary). ) The work relating to the work W is performed by taking out the parts from the parts box 34 and attaching them to the work W. A screen example of the display device 33 will be described with reference to FIG.

  When the work on all the works W contained in the work case WC is completed, the worker 37 puts all the works W into the work case WC, takes out the work instructions 80 contained in the work management terminal B32, and the work instructions. 80 and the work case WC are placed on the second stock area 32.

  FIG. 3 is an explanatory view showing a display screen example of the display. This will be described with reference to FIG. The display 33 includes an instruction number 331, instruction contents 332 (including the model number, product name, and number (number) of products / semi-products to be manufactured (processed)), assembly instruction information 333 (procedure and work contents), process An ID 334, a worker ID 335, the number of completed workers (completed number) 336, a work start date / time / work end date / time 377 and a detailed work time 338 are displayed.

  In the instruction number 331, information (for example, A01) for specifying the work content of the work W corresponding to the work specifying IC tag 81 is displayed. Further, in the instruction content 332 and the assembly instruction information 333, detailed information regarding the instruction number 331 is displayed. In the process ID 334, information for specifying a process (for example, W03) is displayed. In the worker ID 335, information for identifying the worker (for example, MM03) is displayed. The information for specifying the worker may be registered in advance in the storage unit 62 (see FIG. 1) of the database server 60, or an IC tag (not shown) for specifying the worker is operated. The database server 60 (see FIG. 1) recognizes when the operator puts it into the box B32a of the work management terminal B32, and may display it on the worker ID 335.

  In the work start date / time / work end date / time 337, the time when the work instruction 80 is put into the box B32a and the time when it is taken out from the box B32a are displayed. The number of completed persons 336 displays the number of completed persons out of the number of production persons (here, 8 sheets). The detailed work time 338 displays the end time of each procedure. For example, when the switch 35 is pressed at the end of each procedure, the time is displayed. In this manner, the worker 37 can reliably proceed with the work in accordance with the work content instruction on the display screen of the display device 33.

  Returning to FIG. 1, the database server 60 is a server that manages issued instructions and analyzes work time, loss time, and the like for each instruction. The instruction issue terminal 50, work management terminals B11, B12, B21, B22, Information from B31, B32, B101 (see FIG. 4), B102, and the administrator terminal 70 is stored. The database server 60 includes a processing unit 61 and a storage unit 62.

  The database server 60 stores registration information from the instruction issuing terminal 50 in the storage unit 62. When the database server 60 receives information from the work management terminals B11, B12, B21, B22, B31, B32, B101, and B102, that is, communication start information, information specifying work contents, and communication end information, the database server 60 stores the information. Store in the unit 62. The received information is recorded with time information (time stamp) including date. The processing unit 61 of the database server 60 calculates, for example, the work time for each instruction from the information in the storage unit 62 and stores the calculation result in the storage unit 62.

  The manager terminal 70 makes the database server 60 search by monitoring item for the work results of the work processes occurring in the manufacturing process, thereby visualizing the loss time generated in addition to the standard cost and generating the loss time. This terminal is used to analyze the cause. The monitoring items include, for example, a loss time generation process, a loss time generation line, a loss time generation factory, and a loss time generation time zone / period.

  The administrator terminal 70 includes a processing unit 71, a keyboard 73, a display device 74, an IC tag reader / writer 75, and a printer 76. The processing unit 71 includes a database search unit 72 that searches the loss time for each monitoring item, displays the search result by the database search unit 72 on the display device 74, and writes to the IC tag by the reader / writer 75. Output or output to the printer 76.

  The processing units 51, 61, 71 can be realized by, for example, a CPU (Central Processing Unit). The storage unit 62 can be realized by, for example, a memory or a hard disk.

Next, the movement of the work instruction 80, the movement instruction 90, and the setup instruction 110 will be described.
FIG. 4 is an explanatory diagram showing the movement of the instruction when shifting from the reflow process to the assembly process. The semi-finished product A soldered in the solder reflow furnace (process W02) will be described with reference to FIG. 1 as appropriate, taking as an example the flow of manual circuit board assembly (process W03). In the assembly process of attaching the part Z, the part Y, and the part X based on the semi-finished product A, the person in charge of distribution conveys the semi-finished product A from the work space 20 to the work space 30 based on the moving instruction 90. Then, the work instruction 80 and the movement instruction 90 are input to the work management terminal B31. The movement instruction 90 may be taken out by the person in charge of the arrangement after a predetermined time.

  On the other hand, the person in charge of the arrangement performs setup work in the parts warehouse 100 in order to prepare parts necessary for the process W03. The work management terminal B101 is loaded with setup instructions 110 necessary for the work process. The person in charge of the arrangement takes out the setup instruction 110 from the work management terminal B101, inputs it into the work management terminal B102, and starts the setup work. When the person in charge of the arrangement finishes arranging the necessary parts Z of company A, parts Y of company B, and parts X of company C, the arrangement person 110 takes out the setup instruction 110 from the work management terminal B102. Thereafter, the person in charge of the arrangement conveys the prepared parts from the parts warehouse 100 to the assembly work space 30 and inputs the setup instruction 110 to the work management terminal B31. The arrangement instruction 110 may be taken out by the person in charge of the arrangement after a predetermined time.

In the present embodiment, the parts warehouse 100 includes the work management terminal 101 and the work management terminal B102, but it is not always necessary to provide both of the work management terminals. A case where only the work management terminal B102 is provided in the parts warehouse 100 will be described.
The setup instruction 110 has already been issued to the person in charge of the arrangement, and when the person in charge of the arrangement performs the setup operation in the parts warehouse 100 in order to arrange the parts necessary for the process W03, the setup instruction 110 is issued. Is input to the work management terminal B102, and the setup work is started. The person in charge of arrangement arranges the necessary parts Z of company A, part Y of company B, and part X of company C. When the setup work is completed, the person in charge of the arrangement takes out the setup instruction 110 from the work management terminal B102. Thereby, the database 60 can collect communication start information and communication end information regarding the setup work.

In addition, the person in charge of arrangement arranges the necessary parts, such as part Z of company A, part Y of company B, company C of company B, during the setup work from when the setup instruction 110 is input to the work management terminal B102. The parts X are aligned (extracted). At this time, the person in charge of distribution uses the reader / writer 200 to read the component identification IC tag 120 attached to the actual product slip corresponding to the component to be aligned. Then, the component information read by the reader / writer 200 and the component extraction time information related to the read time are transmitted to the database server 60.
That is, the database server 60 transmits the communication start information (ID of the work management terminal B102, the instruction number of the setup instruction, the work start time) of the setup instruction 110, and the communication end information (ID of the work management terminal B102, the setup instruction). 110 instruction number, communication end time). Furthermore, the database server 60 collects the information related to the received component and the component extraction time information in association with each other.
Therefore, the database server 60 can store the information related to the component and the component extraction time information received between the work start time and the communication end time in association with the instruction number of the setup instruction 110. However, when a plurality of setup instructions 110 are not used at the same time (when only one setup instruction 110 is used at a certain time), it is not necessary to transmit the instruction number of the setup instruction 110, and there is no need to associate with the instruction number. Become.
The component identification IC tag 120 records the component name, the order date, the arrival date, the order quantity, the arrival quantity, the remaining delivery quantity, etc. in addition to the part code (part identification information) for identifying the part. . In addition, it is assumed that the actual product slip is created for each lot to be received.
However, if the IC tag 120 for component specification is affixed for every component, management for every component is possible and it is suitable. In this case, the reader / writer 200 reads the component specifying IC tag 120 for each component and transmits it to the database server 60. The database server 60 can collect information written in the component identification IC tag 120 and the component extraction time information in association with each component.

  The worker 37 (see FIG. 1) takes out the work instruction 80 from the work management terminal B31 and puts it in the work management terminal B32 when starting work. When the assembly of the parts Z, the parts Y, and the parts X to the semi-finished product A is completed, the worker 37 takes out the work instruction 80 from the work management terminal B32. In such a work process, the work result list 63 registered in the database server 60 will be described with reference to FIG.

  FIG. 5 is an explanatory diagram showing an example of work results in the work process. This will be described with reference to FIG. A work result list 63 is stored in the storage unit 62 of the database server 60. The work result list 63 includes an instruction number (instruction No) 631, a related instruction number (related instruction No) 632, a work management terminal number (work management terminal No) 633, an instruction input time 634, an instruction take-out time 635, and a process. 636 and information on the worker 637 are stored. Here, of the instruction number 631, the first initial symbol A represents the work instruction 80, the identification symbol T represents the moving instruction 90, and the identification symbol D represents the setup instruction 110. For example, the work instruction A01 is input to the work management terminal B11 at 10:05:30 on May 10, 200X (200X / 5/10 10:05:30), and at 10:15 on May 10, 200X. It can be seen that it is taken out at 00 seconds (200X / 5/10 10:15:00). Further, referring to the work management terminal number 633 column, it can be seen that the work instruction A01 moves to the work management terminals B11, B12, B21, B22, B31, and B32.

  Similarly, it can be seen that the related instructions of the work instruction A01 are the movement instruction T01 and the setup instruction D03 from the related instruction number column 632, the process is W01, and the worker is MM01. Further, referring to the work management terminal number 633 column, it can be seen that the movement instruction T01 has moved to the work management terminals B11, B21, B31. Further, referring to the work management terminal number 633 column, it can be seen that the setup instruction D03 has moved to the work management terminals B101, B102, B31.

  In addition, as shown in FIG. 5, when it sorts as time-sequential data by order No. (it arranges according to a fixed rule), it will be understood whether the operation | work is performed according to the order of an original operation | work. For example, when the work instruction A01 moves to the work management terminals B11, B12, B31, and B32 with reference to the work management terminal number 633 column, the work of the work management terminals B21 and B22 may not be performed. Recognize. In addition, when moving with the work management terminals B11, B12, B31, B32, B21, and B22, it is understood that the work is not performed in accordance with the regular work process. As described above, the work performance list 63 is used to evaluate the work that has been performed as a fact, and also to manage whether the work process is performed in a regular order or whether the work process is skipped. can do.

  FIG. 6 is a flowchart showing processing of information regarding the work process. Specifically, a procedure for calculating the lead time of the work process will be described with reference to FIG. 1 as appropriate. Basically, the lead time of the work process can be indicated by adding the stagnation time, the work time, and the travel time. Here, it is assumed that the work result list 63 illustrated in FIG. 5 is stored. The instruction numbers of the work instruction 80, the movement instruction 90, and the setup instruction 110 correspond to the work instruction A01, the movement instruction T01, and the setup instruction D03 in FIG. The flowchart showing the information processing in each work process is the same, and will be described using the example of the process W01.

  First, the processing unit 61 of the database server 60 starts from the B11 input time (the time when the person in charge of the assignment inputs the work instruction 80 or the movement instruction 90 into the work management terminal B11) to the B12 input time (the worker 17 works the work instruction 80). Up to the time when it is input to the management terminal B12) is calculated (determined) as the stagnation time of the work W in the process W01 (step S1). Here, the worker 17 is in a state where work related to the work W can be started from the B11 input time, and is not working until the B12 input time when the work is actually started. Since W has stagnated (stayed) in the work space 10, it is set as the stagnation time of the work W in the process W01.

  The processing unit 61 performs steps S2 and S3 in order to examine the breakdown of the stagnation time. The processing unit 61 determines whether or not there is a delay in the input time in the work order 80 in the order related to the work among the related instructions (step S2). The instruction related to work corresponds to a case where a part or the like necessary in the process instructed in the work instruction is specified. Specifically, in the case of attaching and assembling the part Z, the part Y, and the part X based on the semi-finished product A, the setup instruction 110 is related to the work instruction 80 in the process W03. When there is a delay in the insertion time in the instruction related to the work (step S2, Yes), the loss time of the process W01 is calculated from the insertion time of B11 to the insertion time of the related instruction (step S3). If there is no delay in the insertion time in the instruction related to the work (step S2, No), the process proceeds to step S4.

  Subsequently, the processing unit 61 calculates (determines) the work time of the work W in the process W01 from B12 input time to B12 take-out time (time when the worker 17 takes out the work instruction 80 from the work management terminal B12). (Step S4). Here, since the worker 17 should have performed work related to the workpiece W from the B12 insertion time to the B12 removal time, the time between them is defined as the work time of the workpiece W in the process W01.

  Next, the processing unit 61 calculates the movement time of the work W in the process W01 from the B12 take-out time to the B21 insertion time (the time when the person in charge of the arrangement inputs the work instruction 80 or the movement instruction 90 to the work management terminal B21). (Determine) (Step S5). Here, the person in charge of the arrangement is in a state where the work W and the work instruction 80 can be transported to the work space 20 and the work instruction 80 can be put into the work management terminal B21 from the time B12 is taken out. Up to B21 input time when the instruction 80 is input to the work management terminal B21, it can be regarded as the time required to move the work W to the work space 20, and thus the time between the time and the movement time of the work W in the process W01. To do.

  It is also conceivable that the worker 17 places a plurality of pairs of work instructions 80 and works W in the second stock area 12 and carries them together to the work space 20 together. In this case, a part of the work W is left in the second stock area 12 for a while, but even in that case, for the sake of convenience, the time from the B12 take-out time to the B21 turn-on time is treated as the “movement time”.

  When the processing unit 61 performs such processing, not only the length of the work W but also the breakdown of the stagnation time, the work time, and the movement time with respect to the time when the work W was in the work space 10 and the vicinity thereof. I can grasp it. Further, the processing unit 61 can perform the same processing on the work space 20 and the work space 30.

  FIG. 7 is a time chart showing the position of each instruction and the determination result of the flowchart of FIG. FIG. 7 shows the result of performing the processing of steps S1 to S5 in the flowchart of FIG. 6 based on the work results of FIG. 5, and the positions that existed with respect to the work instruction A01, the movement instruction T01, and the setup instruction D03. (Work management terminal B11 etc.) and the determination results of each time (stagnation time etc. in process W01) are shown. As shown in FIG. 7, with respect to the work W related to the work according to the instruction A01, it is possible for the database server 60 to reliably grasp in what work process (W01, etc.) and what state (stagnation, work or movement). Specifically, the stagnation time of each process (process W01, process W02, process W03), work time, movement time, and loss time (waiting time for instructions related to work) can be grasped in process W03.

  Returning to FIG. 6, after step S <b> 5, the processing unit 61 adds the stagnation time, the work time, and the travel time for the process W <b> 01 of the work instruction A <b> 01, and gives the lead time (the added value, also expressed as L / T). Calculate (step S6). Further, the processing unit 61 extracts a work time as a substantial lead time (step S7). Subsequently, the processing unit 61 calculates (actual lead time / lead time) × 100 (%), and calculates a substantial lead time ratio (actual work time ratio) (step S8).

  FIG. 8 is an explanatory diagram showing time distribution related to the work of the instruction. The result of having performed the processing of steps S4 to S6 in the flowchart of FIG. 6 based on the work results of FIG. As shown in FIG. 8, regarding the instruction A01, the stagnation time, working time, travel time, L / T, real L / T, and real L / of the process W01, the process W02, the process W03, and their total (TOTAL) The T ratio is displayed. Specifically, in the case of the process W01, the lead time is 94 minutes and 30 seconds, the substantial lead time is 74 minutes and 45 seconds, and the substantial L / T ratio is 79%. On the other hand, the actual L / T ratio of the process W03 is a bad result of 51%. One reason for this is that the stagnation time includes a loss time of 16 minutes 50 seconds.

  FIG. 9 is an explanatory diagram illustrating an example of an output screen of the administrator terminal. It is a screen displayed on the display device 74 (see FIG. 1) when the administrator activates the lead time measurement system software. The lead time measurement system is a system that, when a work instruction number 741 (for example, work instruction A01) is designated, performs the processing of the flowchart of FIG. 6 and displays the result. The display screen shows an example of the display screen when the entire L / T button 742 is pressed. The display screen includes a result column 744 and a detail column 745. In the actual result column 744, the stagnation time, the work time, and the movement time of each process are indicated by a horizontal bar graph. In particular, the loss time during the stagnation time is displayed, and the administrator easily generates the loss time. You can understand that. The detail column 745 shows the start time, end time, and actual L / T of the work time for each process. When the L / T breakdown button 743 is pressed, the stagnation time including the loss time, the work time, and the movement time, which are breakdowns of L / T, are displayed in the detail column 745. Further, when the operation status button 746 is pressed, for example, a list of work instructions currently in progress is displayed.

Returning to FIG. 7, if it is possible to visualize how the stagnation time (work waiting time) shown in FIG. 7 is related to the component acquisition timing, one of the causes of the stagnation time is caused by the component acquisition timing. It becomes possible to analyze whether it is a thing.
Accordingly, FIGS. 10 and 11 show time charts obtained by adding the part extraction time to the time chart shown in FIG. 7, and an analysis example of the relationship between the stagnation time and the part acquisition timing will be described (see FIG. 4 as appropriate). FIG. 10 is a diagram illustrating an example in which the component extraction time affects the stagnation time. FIG. 11 is a diagram illustrating an example in which the component extraction time does not affect the stagnation time.
10 and 11, in both cases, the time when the setup instruction D03 is input to the work management terminal B31 is delayed from the time when the work instruction A01 or the movement instruction T01 is input to the work management terminal B31. Show. This is because the time when the setup instruction D03 was originally taken out from the work management terminal B102 is late. 10 and 11, a stagnation time (loss time) occurs in the same manner. However, the part extraction times of the parts X, Y, and Z are different between FIG. 10 and FIG. The relationship between the part extraction time and the stagnation time (loss time) will be described below. That is, a method for determining whether or not the part acquisition (extraction) timing affects the stagnation time (loss time) will be described.
However, the main difference between FIG. 10 and FIG. 11 from FIG. 7 is that the description of the processes W01 and W02 which are not related to the explanation is deleted, the time chart of the picking position is added, and the actual product related to the parts X, Y and Z This is that the component identification IC tag 120 affixed to the vote indicates the component extraction time read by the reader / writer 200.

At the picking position in FIG. 10, the time (part extraction time) at which the parts X, Y, and Z assigned to the work in the process W03 are extracted in the setup work is displayed. In FIG. 10, the extraction of the part Z is delayed from the time when the work instruction A01 or the movement instruction T01 is input to the work management terminal B31. Therefore, the take-out time of the setup instruction D03 is also delayed. Therefore, it is determined that the stagnation time (loss time) has occurred because the extraction of the part Z is delayed (parts necessary for the process W03 are not prepared).
In order to determine whether or not the part extraction time has an influence on the work start of the process W03, a determination criterion needs to be provided.
Therefore, the determination criteria will be described below. First, the person in charge of the layout estimates (estimates) in advance the time (related to movement) that is required until the setup instruction D03 is input to the work management terminal B31 after the last part extraction. . The estimated movement time is referred to as movement estimation time. Next, the time before the actual B31 insertion time by the estimated movement time is determined as the part extraction deadline (reference time). That is, this part extraction deadline is a determination criterion corresponding to the time limit when the setup instruction D03 is taken out from the work management terminal B102. Therefore, if the parts are extracted before the part extraction deadline, the setup instruction D03 is input to the work management terminal B31 without delay. The part extraction deadline may be calculated after reading the B31 insertion time stored in the storage unit 62 (see FIG. 1), or may be performed directly after receiving the B31 insertion time.

Next, determination of whether or not the part extraction time (preparation time) of parts X, Y, and Z shown in FIG. 10 exists before the part extraction deadline will be described below. However, the part extraction time is assumed to be when the parts are ready to be sent.
Since the part extraction time of parts X and Y is before the part extraction deadline, it cannot be said that the extraction of parts X and Y has an influence on the stagnation time of process W03. However, the part extraction time of the part Z is after the part extraction deadline. Therefore, it can be said that the stagnation time of the process W03 is related to the delay in extracting the part Z. If the information described in the actual product slip corresponding to the part Z for which extraction has been delayed is also displayed, it is possible to analyze the relationship with the order date, arrival date, order quantity, and the like.

Next, in FIG. 11, since the part extraction times for parts X, Y, and Z all exist before the part extraction deadline, the extraction of parts X, Y, and Z affects the stagnation time of process W03. It cannot be said that it is giving. Therefore, in the case of FIG. 11, it is determined that the stagnation time has occurred due to other causes even though the parts are ready.
The above-described determination can be executed in the database server 60 after the time when the setup instruction D03 is taken out from the work management terminal B102.
In FIGS. 10 and 11, the horizontal axis is displayed as time, but the horizontal axis may be a month or a day.

Here, the above-described determination process will be described with reference to the flowchart of FIG. 12 (see FIG. 1 as appropriate). FIG. 12 is a diagram illustrating a flow of processing for determining (identifying) a component that causes a stagnation time.
In the flowchart shown in FIG. 12, the processing unit 61 of the database server 60 sets the work instruction 80 or the movement instruction 90 to the work management terminal B31 at the input time (for example, in FIG. The part extraction deadline (reference time) is calculated by subtracting the estimated movement time from the time at which the work management terminal B31 is input) (step S10). 10 and 11, the work instruction A01 position is expressed as being put in the work management terminal B31. However, the work instruction A01 is touched & touched like the movement instruction T01. It may be done by touch-and-go.
Next, the part extraction time (preparation time) and the part extraction deadline are compared to determine whether or not the part extraction time is after the part extraction deadline (step S11). If the part extraction time is before the part extraction deadline (step S11, No), the process ends. If the part extraction time is later than the part extraction deadline (step S11, Yes), the process proceeds to step S12.
In step S12, the part determined to be after the part extraction deadline (for example, part Z in FIG. 10) and information on the actual product slip relating to the part are output (displayed), and the process ends.
In the flowchart shown in FIG. 12, in step S2 of FIG. 6, the input of the setup instruction 110 (for example, D03 in FIG. 10) to the work management terminal B31 is changed to the work instruction 80 (for example, in FIG. A01) or a movement instruction 90 (for example, T01 in FIG. 10) is assumed to be delayed from the input to the work management terminal B31.

According to the work management system SS of the present embodiment, it is possible to grasp not only the stagnation time, processing time, and travel time, but also the length and ratio of the actual lead time. Further, as a breakdown of the stagnation time, it is possible to manage the loss time waiting for the related instruction. Therefore, it is possible to finely manage the time regarding the work divided into a plurality of processes, and thereby it becomes easy to grasp the efficiency of the work and specify the useless work.
In addition, the work management system SS of the present embodiment can also collect the timing related to the procurement time of parts required in each process and the time when parts are distributed to each work process. This makes it easy to grasp the efficiency of work related to parts acquisition and to identify useless work.

It is a block diagram which shows the work management system of this embodiment. It is an external appearance perspective view which shows an example of a work table. It is explanatory drawing which shows the example of a display screen of a display. It is explanatory drawing which shows the motion of the instruction | indication when transfering from a reflow process to an assembly process. It is explanatory drawing which shows the example of the work performance of a work process. It is a flowchart which shows the process of the information regarding a work process. It is a time chart which shows the position of an instruction | indication, and the determination result of the flowchart of FIG. It is explanatory drawing which showed time distribution regarding the operation | work of an order. It is explanatory drawing which shows an example of the output screen of an administrator terminal. It is a figure which shows the example in which component acquisition timing has influenced the time of work waiting. It is a figure which shows the example in which the component acquisition timing has not affected the waiting time of work. It is a figure which shows the flow of a process which specifies (determines) the component which causes a stagnation time.

Explanation of symbols

10, 20, 30 Work space 40 Network 50 Instruction issuing terminal 60 Database server (information processing device)
61 processing unit 62 storage unit 70 administrator terminal 80 work instruction 81 work identification IC tag (first IC tag)
90 Movement instruction 91 Movement identification IC tag 110 Setup instruction 111 Setup identification IC tag 120 Component identification tag (second IC tag)
200 Reader / writer (second reader)
B11, B12, B21, B22, B31, B32 Work management terminal B31a box B32a box B31b Reader / writer (first reader)
B32b Reader / Writer

Claims (6)

The predetermined work for the work object is divided into a plurality of work processes, and the plurality of work processes are performed in different work spaces, and the time related to the delay of the work of the worker in those work spaces,
A work instruction attached with a first IC tag in which information specifying the work content is written;
An invoice for each part with a second IC tag to which information on the part used for work in the work space is written;
A first reader that is installed in the work space and used to read information of the first IC tag attached to the work instruction when the work instruction is brought into the work space;
The second IC tag attached to the product tag corresponding to the prepared part is installed at a place where the part is prepared and each part is ready to be sent to the work space. A second reader used to read information;
An information processing apparatus for processing information on the work;
A work management system that uses
The information processing apparatus includes:
When the information of the first IC tag attached to the work instruction is received from the first reader, the location of the part preparation work from the read time of the received first IC tag and the work space Subtracting a predetermined time considering the movement time of the parts in between to calculate the reference time and store it in the storage unit,
When receiving the information of the second IC tag attached to the actual product slip transmitted every time the component is ready to be sent from the second reader, the reading time of each received second IC tag is obtained. Memorize in the memory,
The reading time of each second IC tag stored in the storage unit is set as the preparation time of each component, and the reference time stored in the storage unit is compared with each of the preparation times. If the preparation time is late, determining that the work delay is related to the preparation delay of the parts,
Work management system characterized by The predetermined work for the work object is divided into a plurality of work processes, and the plurality of work processes are performed in different work spaces, and the time related to the delay of the work of the worker in those work spaces,
A work instruction attached with a first IC tag in which information specifying the work content is written;
An invoice for each part with a second IC tag to which information on the part used for work in the work space is written;
A first reader that is installed in the work space and used to read information of the first IC tag attached to the work instruction when the work instruction is brought into the work space;
The second IC tag attached to the product tag corresponding to the prepared part is installed at a place where the part is prepared and each part is ready to be sent to the work space. A second reader used to read information;
An information processing apparatus for processing information on the work;
A work management system that uses
The information processing apparatus includes:
When receiving the information of the first IC tag attached to the work instruction from the first reader, the received reading time of the first IC tag is stored in the storage unit,
When receiving the information of the second IC tag attached to the actual product slip transmitted every time the component is ready to be sent from the second reader, the reading time of each received second IC tag is obtained. Memorize in the memory,
A reference time is calculated by subtracting a predetermined time in consideration of the movement time of the component between the work space and the place where the component is prepared from the read time of the first IC tag stored in the storage unit In addition, the reading time of each second IC tag stored in the storage unit is set as the preparation time of each component, and the reference time is compared with each of the preparation times, so that any one of the reference times If the preparation time is late, determining that the work delay is related to the preparation delay of the parts;
Work management system characterized by The predetermined time is an estimate of a time required for movement between the installation location of the first reader and the installation location of the second reader;
The work management system according to claim 1 or 2, characterized by the above-mentioned. The second IC tag stores at least information relating to part identification information, order date, arrival date, and order quantity,
The information processing apparatus includes:
When it is determined that there is a delay in the preparation of parts due to the work delay, the preparation time and the parts identification information, the order date, the arrival date, and the order quantity are output in association with each other;
The work management system according to claim 1 or 2, characterized by the above-mentioned. The detection state of the IC tag is changed when the IC tag is newly detected and when the IC tag is not detected.
The work management system according to claim 1 or 2, characterized by the above-mentioned. The predetermined work for the work object is divided into a plurality of work processes, and the plurality of work processes are performed in different work spaces, and the time related to the delay of the work of the worker in those work spaces,
A work instruction attached with a first IC tag in which information specifying the work content is written;
An invoice for each part with a second IC tag to which information on the part used for work in the work space is written;
A first reader that is installed in the work space and reads information on the first IC tag attached to the work instruction;
A second reader which is installed at a place where the parts are prepared and reads information of a second IC tag attached to the product tag;
An information processing apparatus for processing information on the work;
A work management method using
The information processing apparatus includes:
When receiving the information of the first IC tag attached to the work instruction from the first reader, a predetermined time is subtracted from the reading time to calculate a reference time and store it in the storage unit,
When receiving the information of the second IC tag attached to the actual product slip from the second reader, the preparation time when the part corresponding to the actual product slip is prepared is stored in the storage unit,
Comparing the reference time stored in the storage unit with the preparation time stored in the storage unit, if the preparation time is later than the reference time, there is a delay in the preparation of parts due to the delay in the work. Determining that there was,
Work management method characterized by

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