JP2023070273A - Analysis device, analysis method and program - Google Patents

Abstract

To realize an analysis device capable of providing information suitable for improving work at a production site including cooperative processes.SOLUTION: An analysis device includes: a first acquisition unit that acquires first information indicating a first time period during which machine work in a cooperative process was performed; a second acquisition unit that acquires second information indicating a second time period during which a worker stayed at a work site of the cooperative process; an analysis unit that analyzes a work status using the first information and the second information; and a providing unit that provides a screen showing results of analysis performed by the analysis unit. The screen shows a first waiting time during which the worker is waiting for the machine to finish work, and a second waiting time during which the machine is waiting for the worker's arrival at the work site after finishing the work.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an analysis device, an analysis method, and a program.

Work analysis is performed to improve work efficiency at production sites that include multiple processes. For example, Japanese Patent Laying-Open No. 2021-92868 (Patent Document 1) acquires operation history information obtained from a control device that controls an industrial machine and information around the machine by sensors installed around the industrial machine. It discloses a system that performs machine learning using information obtained from In this system, the learning result is used to determine what kind of work process the worker is in.

Japanese Patent Application Laid-Open No. 2021-92868

In recent years, production sites may include cooperative processes in which humans (workers) and machines such as robots work in cooperation. In a production site including cooperative processes, it is necessary to consider the work efficiency of both workers and machines to improve work. Patent Document 1 does not provide information on the balance of work efficiency of both workers and machines in a collaborative process. Therefore, the technique described in Patent Literature 1 cannot provide information suitable for improving production site operations including cooperative processes.

The present disclosure has been made in view of the above problems, and its purpose is to provide an analysis device, an analysis method, and a program that can provide information suitable for improving work at production sites including cooperative processes. be.

According to an example of the present disclosure, an analysis device analyzes work conditions at a production site including multiple processes. The plurality of processes includes cooperative processes in which cooperative work between workers and machines is repeatedly performed for each cycle. Cooperative work includes a first work by the worker and a second work performed by the machine after the first work. The analyzer includes a first acquisition unit that acquires first information indicating a first time period during which the second work was performed, and a second acquisition unit that obtains first information indicating a second time period during which the worker stayed at the work site of the cooperative process. The apparatus includes a second acquisition unit that acquires information, an analysis unit that analyzes the work situation using the first information and the second information, and a provision unit that provides a screen showing analysis results by the analysis unit. The screen shows a first waiting time during which the worker is waiting to finish the second job and a second waiting time when the machine is waiting for the worker to arrive at the job site after finishing the second job. .

The first waiting time is wasted time for the worker. Conversely, the second waiting time is wasted time for the machine. According to this disclosure, by checking the screen, the user should take measures to reduce either the first waiting time or the second waiting time in order to improve the work at the production site including the cooperative process. can recognize Thus, the analysis device can provide information suitable for improving shop floor operations, including collaborative processes.

In the above disclosure, the screen includes a first graph showing temporal changes in the first standby time and the second standby time, a second graph showing temporal changes in the cumulative value of the first standby time, and an accumulation of the second standby time. and a third graph showing changes in values over time.

According to this disclosure, the user can easily recognize the temporal change of the first waiting time or the second waiting time by checking the screen.

In the above disclosure, the analysis unit calculates the first operation rate indicating the ratio of the time the second work is performed in the analysis target period, Calculate a second operating rate that indicates the ratio of the time during which the Furthermore, the analysis unit executes simulation processing for simulating fluctuations in the first operating rate and the second operating rate when the worker's arrival timing at the work site of the cooperative process is changed. The screen shows the results of the simulation process.

According to this disclosure, screens containing the results of the simulation process are provided. In the simulation process, fluctuations in the first operating rate and the second operating rate are simulated when the worker's arrival timing at the work site of the cooperative process is changed. Therefore, the user can grasp the relationship between the first operating rate and the second operating rate by checking the screen. The first operating rate becomes lower as the time the machine waits for the start of the first work becomes longer. The second operating rate becomes lower as the worker waits for the completion of the second work of the machine for a longer period of time. Therefore, by checking the result of the simulation processing, the user can determine whether the first operating rate and the second operating rate are within the allowable range, and can take appropriate measures according to the production site.

In the above disclosure, for each cycle included in the analysis target period, the analysis unit determines the end timing of the second work in the previous cycle and the arrival of the worker at the work site of the cooperative process for the first work in the target cycle. Calculate the time difference from the timing. The simulation processing includes calculation processing for calculating the first operating rate and the second operating rate when the time difference between cycles is changed by the specified amount of change.

According to this disclosure, it is possible to easily simulate fluctuations in the first operating rate and the second operating rate when the arrival timing is changed.

In the above disclosure, the analysis unit calculates the average cycle time of collaborative work in the analysis target period. The calculation process further includes calculating the average cycle time when the time difference is changed by the amount of change. The analysis unit executes the calculation process multiple times with different amounts of change. The screen includes a fourth graph showing variations in the first availability and the second availability in response to changes in the average cycle time.

According to this disclosure, the user can easily grasp the relationship between the average cycle time and the first operating rate and the second operating rate by checking the first graph.

In the above disclosure, the screen includes a fifth graph showing changes in cycle time of the coordination process over time.

According to this disclosure, the user can easily grasp the fluctuation of the cycle time at the production site.

In the above disclosure, the screen includes a first Gantt chart indicating the time period during which the first work was performed and a second Gantt chart indicating the time period during which the second work was performed.

According to this disclosure, the user can easily grasp the flow of the first work and the second work at the production site.

In the above-described disclosure, the screen includes a sixth graph showing respective ratios of the time during which the first work was performed and the total of the first waiting time during the analysis target period.

As described above, the first waiting time is wasted time for the operator. Therefore, according to this disclosure, the user can grasp the proportion of the worker's wasted time in the analysis target period.

In the above-described disclosure, the screen includes a seventh graph showing respective ratios of the time during which the second work was performed and the total of the second waiting time in the analysis target period.

As mentioned above, the second waiting time is wasted time for the machine. Therefore, according to this disclosure, the user can grasp the proportion of wasted time for the machine in the analysis target period.

According to one example of the present disclosure, an analysis method analyzes a work situation at a production site including multiple steps. The plurality of processes includes cooperative processes in which cooperative work between workers and machines is repeatedly performed for each cycle. Cooperative work includes a first work by the worker and a second work performed by the machine after the first work. The analysis method includes the steps of obtaining first information indicating a first time period during which the second work was performed, and obtaining second information indicating a second time period during which the worker stayed at the work site of the cooperative process. analyzing the work situation using the first information and the second information; and providing a screen showing the analysis result. The screen shows a first waiting time during which the machine waits for the worker to arrive at the job site after completing the second job, and a second waiting time during which the worker waits for the worker to finish the second job. .

According to one example of the present disclosure, the program causes a computer to execute the analysis method described above. These disclosures can also provide information suitable for improving shop floor operations, including collaborative processes.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide information suitable for improving production site operations including cooperative processes.

It is a figure which shows an example of the system in which the analyzer which concerns on embodiment is applied. 1 is a schematic diagram showing an example of a hardware configuration of an information processing device; FIG. It is a figure which shows an example of entrance/exit information. FIG. 4 is a diagram showing an example of frames included in a moving image acquired from a camera; It is a schematic diagram which shows an example of the hardware constitutions of a control apparatus. It is a figure which shows an example of machine work information. It is a figure which shows an example of error information. 1 is a schematic diagram showing an example of a hardware configuration of an analysis device according to an embodiment; FIG. It is a figure showing an example of functional composition of an analysis device concerning an embodiment. FIG. 5 is a diagram showing the relationship between the operating hours of machines and the staying hours of workers at the work site in a cooperative process; 4 is a flowchart showing the flow of analysis processing; FIG. 12 is a flow chart showing the flow of a subroutine of step S11 shown in FIG. 11; FIG. FIG. 12 is a flow chart showing the flow of a subroutine of step S12 shown in FIG. 11; FIG. It is a figure explaining the process of step S32, S33 shown in FIG. It is a figure which shows an example of the screen which shows an analysis result. FIG. 10 is a diagram showing another first example of a screen showing analysis results; FIG. 11 is a diagram showing another second example of a screen showing analysis results; FIG. 12 is a diagram showing another third example of a screen showing analysis results;

Embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. Each modified example described below may be selectively combined as appropriate.

§1 Application Example An application example of the analyzer according to the present embodiment will be described with reference to FIG. FIG. 1 is a diagram showing an example of a system to which an analyzer according to an embodiment is applied. As shown in FIG. 1, the system 1 includes an analysis device 10, an information processing device 20, a control device 30, a plurality of machines 40, and a camera 50.

A plurality of machines 40 are arranged on the production site 2 . The production site 2 includes multiple processes Pr. At the production site 2, for example, various products are produced through a plurality of processes Pr. The plurality of processes Pr include, for example, a "painting" process, a "main work assembly" process, a "installation of the main work into the main body" process, and an "inspection" process. If it is necessary to distinguish each of the plurality of processes Pr, add a subscript such as "(1)", "(2)", "(3)", ..., "(n)" to the code. to distinguish. For example, "process Pr(1)", "process Pr(2)", ..., "process Pr(n)" are used for distinction. When there is no particular need to distinguish each of the plurality of processes, they are simply referred to as "process Pr".

A plurality of machines 40 are used in a plurality of processes Pr, respectively. That is, the process Pr and the machine 40 are associated in advance. When it is necessary to distinguish a plurality of machines 40 from each other, they are distinguished by adding subscripts such as "(1)", "(2)", ..., "(n)" to the symbols, It is simply referred to as "machine 40" when there is no particular need to distinguish it. For example, one or more machines 40(m) are used to perform process Pr(m). That is, one or more machines 40(1) are used to perform step Pr(1). Similarly, one or more machines 40(2) are used to perform step Pr(2).

The plurality of processes Pr include cooperative processes in which cooperative work between the worker and the machine 40 is repeatedly performed in each cycle. In the present embodiment, the multiple processes Pr include the process Pr(1) as a cooperative process. Hereinafter, process Pr(1) will be referred to as "cooperative process Pr(1)." The cooperative work of the cooperative process Pr(1) includes input work by the worker (work of loading a work into the machine 40) and main work (work machining, etc.) performed by the machine 40 after the input work. .

The control device 30 controls the entire production site 2 and is communicably connected to each of the plurality of machines 40 . The control device 30 is, for example, a PLC (Programmable Logic Controller).

Various types of industrial Ethernet (registered trademark) are used as a network that communicably connects the control device 30 and the plurality of machines 40 . Industrial Ethernet (registered trademark) includes, for example, EtherCAT (registered trademark), Profinet IRT, MECHATROLINK (registered trademark)-III, Powerlink, SERCOS (registered trademark)-III, and CIP Motion. You can use any one of them. Furthermore, field networks other than Industrial Ethernet may be used. For example, if motion control is not performed, DeviceNet, CompoNet/IP (registered trademark), etc. may be used.

The control device 30 operates as a master in the master-slave control system and acquires information from each of the machines 40 as input devices (measuring devices) as input data. The control device 30 executes arithmetic processing using the acquired input data according to a preinstalled user program. The control device 30 determines control details for the master-slave control system according to the execution of arithmetic processing, and outputs control data corresponding to the control details to each of the plurality of machines 40 . The control device 30 repeatedly acquires input data from each of the plurality of machines 40 and acquires control data from each of the plurality of machines 40 at a predetermined cycle (control cycle).

Input data from each of the plurality of machines 40 may include data indicating the start of work by the machine 40 , data indicating the end of work by the machine 40 , and an abnormality flag indicating whether or not an abnormality has occurred in the machine 40 . The machine 40 includes an on-state anomaly flag in the input data while any anomaly is detected, and an off-state anomaly flag in the input data while no anomaly is detected.

For each process Pr, the control device 30 sets a time zone (hereinafter referred to as an "operating time zone") during which work by the machine 40 of the process Pr (the above-mentioned "main work" in the case of the machine 40(1)) was performed. ) is generated and stored. The machine work information indicates the start time (hereinafter referred to as "work start time") and end time (hereinafter referred to as "work end time") of each operating time period. The control device 30 is connected to a time synchronization server (not shown), and identifies the work start time and work end time of the operating hours based on the time synchronization server. For example, when the input data obtained from the machine 40 indicates the start of work, the control device 30 obtains the time when the input data is obtained from the time synchronization server, and stores the obtained time as the work start time. Similarly, when the input data obtained from the machine 40 indicates the end of work, the control device 30 obtains the time when the input data is obtained from the time synchronization server, and stores the obtained time as the work end time.

A plurality of machines 40 act as slaves in a master-slave control system. The plurality of machines 40 is an input device that repeatedly transmits input data to the control device 30 in each predetermined control cycle, or repeatedly receives control data from the control device 30 in each predetermined control cycle and controls the received control data. It is an output device that operates according to data. The plurality of machines 40 includes, for example, a sensor (for example, a photoelectric sensor) as an input device that transmits detection results and the like to the control device 30, a barcode reader that transmits read results, and an inspection machine (tester) that transmits inspection results. may include Also, the plurality of machines 40 may include a PT (Programmable Terminal) to which a plurality of input devices are connected. Furthermore, the plurality of machines 40 may include a robot or the like as an output device that performs screw tightening, picking, or the like.

The camera 50 is installed at a position (typically on the ceiling) from which the entire production site 2 can be overlooked, and captures the entire production site 2 to generate moving image data (hereinafter simply referred to as "moving image"). . Camera 50 is, for example, a wide-angle camera or an ultra-wide-angle camera.

Information processing device 20 is communicably connected to control device 30 and camera 50 . The information processing device 20 uses the moving image acquired from the camera 50 to record an input indicating the time period during which the worker stayed at each work site of the plurality of processes Pr (hereinafter referred to as "stay time period"). Generate and store exit information. The entrance/exit information indicates the start time (hereinafter referred to as "stay start time") and end time (hereinafter referred to as "stay end time") of each stay period. The stay start time is the time when the worker enters the work site, and the stay end time is the time when the worker leaves the work site.

The analysis device 10 is communicably connected to the information processing device 20 and the control device 30, and analyzes the work status of the production site 2 including a plurality of processes Pr. The analysis device 10 is, for example, a general-purpose computer and is connected to the display device 70 .

The analysis device 10 acquires machine work information indicating the operating hours of the machine 40(1) in the cooperative process Pr(1) from the control device 30 (step S1). Furthermore, the analysis device 10 acquires entry/exit information indicating the stay time zone of each worker in the plurality of processes Pr from the information processing device 20 (step S2).

The analysis device 10 analyzes the work status of the production site 2 using the machine work information and the entrance/exit information (step S3). The analyzer 10 then provides a screen showing the analysis results (step S4). For example, the analysis device 10 displays the screen on the display device 70 .

In the cooperative process Pr(1), when the worker arrives at the work site of the cooperative process Pr(1) before the machine 40(1) completes the main work of the previous cycle, the worker continues to perform the following operations until the main work is completed. Cycle load operation cannot be started. The time the worker waits for machine 40(1) to finish the main work of the previous cycle is wasted time for the worker. On the other hand, if the start of the loading work by the worker is delayed, the start of the main work by the machine 40(1) is also delayed. The time that machine 40(1) waits for the start of input work is wasted time for machine 40(1). Therefore, in step S3, the analysis device 10 sets, for each cycle, a first waiting time during which the worker waits for the completion of the main work, and a second waiting time waiting for the arrival of . Accordingly, the screen provided in step S4 indicates the first waiting time and the second waiting time.

According to the present embodiment, by checking the screen, the user can take measures to reduce either the first waiting time or the second waiting time in order to improve the work at the production site including the cooperative process. know what to take. Thus, the analysis device can provide information suitable for improving shop floor operations, including collaborative processes.

§2 Concrete example <Hardware configuration of information processing device>
FIG. 2 is a schematic diagram showing an example of the hardware configuration of the information processing apparatus. The information processing device 20 typically has a structure that conforms to a general-purpose computer architecture. As shown in FIG. 2, the information processing device 20 includes a processor 21 such as a CPU (Central Processing Unit) or MPU (Micro-Processing Unit), a memory 22, a storage 23, a camera interface 24, and a communication interface 25. and including. These units are connected to each other via a bus so as to be able to communicate with each other.

Processor 21 develops various programs stored in storage 23 in memory 22 and executes them, thereby realizing various processes according to the present embodiment.

The memory 22 is typically a volatile storage device such as a DRAM (Dynamic Random Access Memory), and stores programs read from the storage 23, moving images received from the camera 50, and the like.

Camera interface 24 mediates data transmission between processor 21 and camera 50 . More specifically, an imaging instruction is output from the processor 21 to the camera 50 via the camera interface 24 . The camera interface 24 outputs the moving image received from the camera 50 to the processor 21 in response to the imaging instruction.

Communication interface 25 mediates data transmission between processor 21 and external devices (eg, control device 30, analysis device 10). The communication interface 25 typically includes Ethernet (registered trademark), USB (Universal Serial Bus), and the like.

Storage 23 is typically a non-volatile magnetic storage device such as a hard disk drive. The storage 23 stores an entrance/exit information generation program 26 executed by the processor 21 and entrance/exit information 27 generated by executing the entrance/exit information generation program 26 .

FIG. 3 is a diagram showing an example of entrance/exit information. The entrance/exit information 27 illustrated in FIG. 3 is expressed in a table format. Each record in the table includes a process ID that identifies the process Pr, and the start time (stay start time) and end time of the period of stay during which the worker stayed at the work site of the process Pr identified by the process ID. (stay end time) are associated with each other. At the production site 2, products are produced one by one. Therefore, when a plurality of products are produced in sequence, the operations in the plurality of steps Pr(1) to Pr(n) are repeatedly performed. Therefore, the entrance/exit information 27 includes a plurality of records indicating the same process ID.

<How to generate entrance/exit information>
Next, a method for obtaining the entrance/exit information 27 by the processor 21 of the information processing device 20 will be described.

FIG. 4 is a diagram showing an example of frames included in a moving image acquired from a camera. FIG. 4 shows frames of a moving image obtained by imaging a production site 2 including five processes Pr. As shown in FIG. 4 , each frame of the moving image shows the production site 2 and the worker Pe working at the production site 2 . Note that each frame of the moving image is associated with an imaging time specified using a time synchronization server (not shown).

A monitoring area Ar is set in advance for each work site of the five processes Pr. Specifically, monitoring areas Ar(1) to Ar(5) are set for processes Pr(1) to Pr(5), respectively. The monitoring areas Ar(1) to Ar(5) are areas within the moving image frame and correspond to the work site. The monitoring areas Ar(1) to Ar(5) are rectangular, for example, and are defined by the coordinates of four vertices.

The processor 21 of the information processing device 20 uses a known object recognition technique to detect the position of the worker Pe in the frame. Specifically, the processor 21 uses a known object recognition technique to detect one or more pixels in which the worker Pe appears. The processor 21 identifies a rectangular area Ap containing the detected one or more pixels, and determines the center of the rectangular area Ap as the position Pp of the worker Pe. In the example shown in FIG. 5, positions Pp(1) and Pp(2) of workers Pe(1) and Pe(2) are detected, respectively.

The processor 21 determines whether or not the worker Pe exists in the monitoring area Ar set for each process Pr at the imaging time of each frame. Specifically, the processor 21 determines that the worker Pe is present in the monitoring area Ar when the position Pp of the worker Pe is included in the monitoring area Ar.

For each process Pr, the processor 21 identifies, from the moving image, a plurality of continuous frames in which it is determined that the worker Pe is present in the monitoring area Ar corresponding to the process Pr. The processor 21 creates a record including a process ID that identifies the process Pr for the specified frames. The processor 21 determines the imaging time of the first frame among the specified frames as the stay start time of the record, and determines the imaging time of the last frame among the specified frames as the stay start time of the record. Determine the end time. The processor 21 generates entrance/exit information 27 including the record thus created.

<Hardware configuration of control device>
FIG. 5 is a schematic diagram showing an example of the hardware configuration of the control device. As shown in FIG. 5, the control device 30 includes a processor 31 such as a CPU or MPU, a chipset 32, a main memory 33, a storage 34, a control system network controller 35, an information system network controller 36, A USB controller 37 and a memory card interface 38 are included.

The processor 31 reads out various programs stored in the storage 34, develops them in the main memory 33, and executes them, thereby realizing control calculations for controlling the control target. The chipset 32 controls data transmission between the processor 31 and each component.

The storage 34 stores a system program 341 for implementing basic processing, a user program 342 for implementing control calculation, and a management program 343 . Note that the management program 343 may be part of the user program 342 . Further, storage 34 stores machine work information 344 and error information 345 generated by execution of management program 343 . The storage 34 stores machine work information 344 and error information 345 for each process Pr. The error information 345 indicates the time period during which the abnormality flag output from the machine 40 is on (hereinafter referred to as "abnormal time period").

It controls exchange of data with the machine 40 via the control system network controller 35 and the control system network.

The information system network controller 36 controls exchange of data with external devices (for example, the analysis device 10, the information processing device 20, etc.) via the information system network.

The USB controller 37 controls data exchange with an external device (for example, a support device) via a USB connection.

The memory card interface 38 is configured such that a memory card 228 can be attached/detached, and data can be written to the memory card 228 and various data (user program, trace data, etc.) can be read from the memory card 228. there is

FIG. 6 is a diagram showing an example of machine work information. The machine work information 344 illustrated in FIG. 6 corresponds to the cooperative process Pr(1). Machine work information 344 is represented in a table format. A record is added to the table for each main work that is repeatedly performed by the machine 40(1) of the cooperative process Pr(1). The record includes two fields in which the time when the corresponding main work was started (work start time) and the time when the corresponding main work was finished (work end time) are respectively described.

The processor 31 of the control device 30 updates the machine work information 344 corresponding to the cooperative process Pr(1) when the input data acquired from the machine 40(1) of the cooperative process Pr(1) indicates the start of work. Add records. The processor 31 acquires the time when the input data is acquired from the time synchronization server, and writes the acquired time in a new record as the work start time. Thereafter, when the input data obtained from the machine 40(1) indicates the end of the work, the processor 31 writes the time when the input data was obtained as the work end time in the record.

FIG. 7 is a diagram showing an example of error information. The error information 345 illustrated in FIG. 7 corresponds to the cooperative process Pr(1). The error information 345 is represented in table form. A record is added to the table for each period in which the abnormality flag from the machine 40(1) of the cooperative process Pr(1) is on. The record includes two fields describing the time when the error flag is switched from off to on (error start time) and the time when the error flag is switched from on to off (error end time). .

When the abnormality flag acquired from the machine 40(1) of the cooperative process Pr(1) switches from the OFF state to the ON state, the processor 31 of the control device 30 updates the error information 345 corresponding to the cooperative process Pr(1). Add records. The processor 31 acquires from the time synchronization server the time when the abnormality flag is switched from the OFF state to the ON state, and writes the acquired time in a new record as the error start time. After that, the processor 31 acquires from the time synchronization server the time when the abnormality flag acquired from the machine 40(1) switched from the ON state to the OFF state, and writes the acquired time in a new record as the error end time.

<Hardware configuration of analyzer>
FIG. 8 is a schematic diagram showing an example of the hardware configuration of the analysis device according to the embodiment. As shown in FIG. 8, analyzer 10 typically has a structure that follows a general computer architecture.

Specifically, the analysis device 10 includes a processor 11 such as a CPU or MPU, a memory 12 , a storage 13 , a display controller 14 , an input interface 15 and a communication interface 16 . These units are connected to each other via a bus so as to be able to communicate with each other.

Processor 11 develops various programs stored in storage 13 in memory 12 and executes them, thereby realizing various processes according to the present embodiment.

The memory 12 is typically a volatile storage device such as a DRAM, and stores programs and the like read from the storage 13 .

Storage 13 is typically a non-volatile magnetic storage device such as a hard disk drive. The storage 13 stores the analysis program 17 executed by the processor 11, the entrance/exit information 27 acquired from the information processing device 20, and the machine work information 344 and error information 345 for each process Pr acquired from the control device 30. Remember. The analysis program 17 installed in the storage 13 is distributed while stored in a memory card or the like.

The display controller 14 is connected to the display device 70 and outputs signals for displaying various information to the display device 70 according to internal commands from the processor 11 .

The input interface 15 mediates data transmission between the processor 11 and an input device 75 such as a keyboard, mouse, touch panel, dedicated console, or the like. That is, the input interface 15 receives an operation command given by the user operating the input device 75 .

The communication interface 16 mediates data transmission between the processor 11 and external devices (for example, the information processing device 20 and the control device 30). The communication interface 16 typically includes Ethernet (registered trademark), USB (Universal Serial Bus), and the like. Note that the analysis program 17 may be downloaded from a distribution server or the like via the communication interface 16 .

When using a computer having a structure according to the general-purpose computer architecture as described above, an OS for providing the basic functions of the computer in addition to the application for providing the functions according to the present embodiment. (Operating System) may be installed. In this case, the program according to the present embodiment may call necessary modules out of program modules provided as part of the OS in a predetermined order and timing to execute processing. That is, the program itself according to the present embodiment does not include the modules described above, and may execute processing in cooperation with the OS.

Alternatively, some or all of the functions provided by executing the analysis program 17 may be implemented as a dedicated hardware circuit.

<Functional configuration of analyzer>
9 is a diagram illustrating an example of a functional configuration of an analysis device according to an embodiment; FIG. As shown in FIG. 9 , analysis device 10 includes first acquisition section 101 , second acquisition section 102 , analysis section 103 , provision section 104 , and storage section 110 . First acquisition unit 101 and second acquisition unit 102 are implemented by communication interface 16 and processor 11 that executes analysis program 17 . The analysis unit 103 is implemented by the processor 11 executing the analysis program 17 . The providing unit 104 is implemented by the display controller 14 and the processor 11 that executes the analysis program 17 .

The first acquisition unit 101 acquires the machine work information 344 indicating the operating hours of the machine 40 from the control device 30 for each of the plurality of processes Pr. Furthermore, the first acquisition unit 101 acquires error information 345 indicating the abnormal time zone of the machine 40 from the control device 30 for each of the plurality of processes Pr. The first acquisition unit 101 stores the acquired machine work information 344 and error information 345 in the storage unit 110 .

The second acquisition unit 102 acquires, from the information processing device 20, the entry/exit information 27 indicating the stay time period during which the worker stayed at each work site of the plurality of processes Pr. The second acquisition unit 102 stores the acquired entrance/exit information 27 in the storage unit 110 .

The analysis unit 103 uses the machine work information 344 , the error information 345 and the entrance/exit information 27 to analyze the work status of the production site 2 .

The providing unit 104 provides a screen showing analysis results according to an input to the input device 75 . Specifically, the providing unit 104 displays the screen on the display device 70 .

<Analysis Department>
Next, analysis processing executed by the analysis unit 103 will be described. The analysis process is defined by instructions contained in analysis program 17 and executed by processor 11 .

(Relationship between operating time zone and stay time zone in cooperative process)
FIG. 10 is a diagram showing the relationship between the operating hours of machines and the staying hours of workers at the work site in the cooperative process. The operating time period of the machine 40(1) is the time period from the work start time to the work end time of each record of the machine work information 344 corresponding to the cooperative process Pr(1). The worker's stay time zone is the time zone from the stay start time to the stay end time of each record corresponding to the process Pr(1) in the entrance/exit information 27 .

The upper part of FIG. 10 shows a pattern when the worker continues to stay at the work site. As shown in the upper part of FIG. 10, the worker arrives at the work site of the cooperative process Pr(1) at time t1 and starts input work. The worker ends the input work at time t2. As a result, machine 40(1) starts the main work at time t2 and finishes the main work at time t3. At time t3 when the main work of machine 40(1) is finished, the worker starts loading work for the next cycle. The worker ends the input work at time t5. As a result, machine 40(1) starts the main work at time t5 and finishes the main work at time t7. In this way, since the worker continues to stay at the work site of the cooperative process Pr(1), the worker can start input work of the next cycle at the timing when the main work of the machine 40(1) ends. As a result, the availability of machine 40(1) is maximized.

However, in the pattern shown in the upper part of FIG. 10, the worker needs to wait while the machine 40(1) is performing the main work. That is, the labor of the operator is wasted while the machine 40(1) is performing the main work. Therefore, in order to efficiently use the labor of the worker, it is preferable that the worker performs work in another process while the machine 40(1) in the cooperative process Pr(1) is performing the main work. .

The middle part of FIG. 10 shows an ideal pattern for maximizing the worker's effort while maintaining the maximum operating rate of the machine 40(1) in the cooperative process Pr(1). That is, at the time t2 when the input work in the cooperative process Pr(1) is completed, the worker moves to another process and performs the work of the other process. After that, at time t3 when the main work of machine 40(1) ends, the worker moves from another process to cooperative process Pr(1) and starts input work of the next cycle. As a result, the machine 40(1) can start the main work at the time t5 when the input work ends, as in the upper pattern of FIG. As a result, the labor of the operator is maximized while maintaining the maximum operating rate of the machine 40(1) in the process Pr(1).

However, depending on the worker's work status in another process, the arrival timing of the worker at the cooperative process Pr(1) may differ from the end timing of the main work of the machine 40(1).

The lower part of FIG. 10 shows a pattern when the arrival timing of the worker for the cooperative process Pr(1) and the completion timing of the main work by the machine 40(1) deviate. The operating time zone of the machine 40(1) and the worker staying time zone in the actual production site 2 are expressed like the pattern shown in the lower part of FIG.

In the pattern shown in the lower part of FIG. 10, the worker moves from another process to the cooperative process Pr(1) at time t4, which is later than time t3 when the main work of machine 40(1) ends, and starts the next cycle. Start loading work. Therefore, the time from time t3 to time t4 corresponds to the time (second waiting time) during which the machine 40(1) waits for the start of input work. The longer the second waiting time, the lower the operating rate of the machine 40(1).

Further, in the pattern shown in the lower part of FIG. 10, the worker returns from another process to the cooperative process Pr(1) at time t8, which is before time t9 at which the main work of the previous cycle by machine 40(1) ends. there is Therefore, the time from time t8 to time t9 corresponds to the time (first waiting time) during which the worker waits for the machine 40(1) to finish the main work of the previous cycle. As the first standby time increases, the worker's operating rate decreases.

The end timing of the main work by the machine 40(1) is specified by the work end time of the machine work information 344 corresponding to the cooperative process Pr(1). On the other hand, the worker's arrival timing at the work site of the cooperative process Pr( 1 ) is specified by the stay start time of the record corresponding to the cooperative process Pr( 1 ) in the entrance/exit information 27 .

Therefore, the analysis unit 103 uses the machine work information 344 and the entrance/exit information 27 to determine, for each cycle, the end timing T1 of the main work in the cycle before the current cycle and the cooperative process schedule for the input work in the cycle. The arrival timing T2 of the worker at the work site of Pr(1) can be identified. The analysis unit 103 can calculate the first waiting time and the second waiting time for each cycle based on the time difference (T1-T2) between the end timing T1 and the arrival timing T2. The time difference (T1-T2) indicates a positive value when the arrival timing T2 is earlier than the end timing T1. On the other hand, the time difference (T1-T2) indicates a negative value when the arrival timing T2 is later than the end timing T1. That is, when the time difference (T1-T2) is a positive value, the absolute value of the time difference (T1-T2) is the time the operator waits for machine 40(1) to finish the main work of the previous cycle, That is, it is the first waiting time. On the other hand, if the time difference (T1-T2) is a negative value, the absolute value of the time difference (T1-T2) is the amount of time machine 40(1) waits for the operator to start input work, i.e., the second Waiting time.

The analysis unit 103 may calculate the time difference (T1-T2) as follows. First, the analysis unit 103 identifies the work end time of each record of the machine work information 344 corresponding to the process Pr(1) as the end timing T1 of the main work by the machine 40(1) in the previous cycle.

Next, the analysis unit 103 extracts records corresponding to the process Pr(1) from the entrance/exit information 27 . For each end timing T1, the analysis unit 103 determines whether or not there is a stay time zone including the end timing T1 among the stay time zones indicated by each record extracted from the entrance/exit information 27 .

If there is no stay time zone including the end timing T1, the analysis unit 103 identifies a record indicating the stay time zone immediately after the end timing T1 from among the records extracted from the entrance/exit information 27 . The analysis unit 103 identifies the stay start time of the identified record as the arrival timing T2, and calculates the time difference (T1-T2). In this case, the time difference (T1-T2) is a negative value.

For example, in the pattern shown in the lower part of FIG. 10, there is no staying time period including the time t3 when the main work of the machine 40(1) is finished. Therefore, the analysis unit 103 identifies a record indicating the stay time zone immediately after time t3 (time zone from time t4 to time t6) from the machine work information 344 corresponding to the cooperative process Pr(1). Then, the analysis unit 103 calculates the time difference (T1-T2) by multiplying the time from time t3 to time t4 by (-1).

If there is a period of stay including the end timing T1, the analysis unit 103 identifies the start time of stay of the period of stay as the arrival timing T2, and calculates the time difference (T1-T2). In this case, the time difference (T1-T2) is a positive value.

For example, in the pattern shown in the lower part of FIG. 10, there is a stay time zone (a time zone with a stay start time at time t8) including time t9 when the main work of machine 40(1) is finished. Therefore, the analysis unit 103 calculates the time from time t8 to time t9 as the time difference (T1-T2).

The maximum value of the time (first waiting time) during which the worker waits for the machine 40(1) to finish the main work in the previous cycle is the time required for the main work. Therefore, when the time difference (T1-T2) calculated as described above is positive and the time difference (T1-T2) is greater than the time required for the work, the analysis unit 103 determines the calculated time difference ( T1-T2) is corrected to the time required for this work. The time required for this work is determined in advance based on the performance of the machine 40(1), experiments, and the like.

(Overall analysis process flow)
FIG. 11 is a flowchart showing the flow of analysis processing. As shown in FIG. 11, first, the analysis unit 103 analyzes the current status of the cooperative process Pr(1) (step S11). In step S11, the value of the feature quantity (including the first waiting time and the second waiting time) indicating the current state of the cooperative process Pr(1) is calculated.

Next, using the current analysis result, the analysis unit 103 executes a simulation process for simulating the variation of the feature amount when the worker's movement time between processes is changed (step S12).

(Flow of subroutine in step S11)
FIG. 12 is a flow chart showing the flow of the subroutine of step S11 shown in FIG. First, the analysis unit 103 determines a search period (step S21). For example, the analysis unit 103 may determine the search period (for example, 9:00 to 14:00 on October 1, 2021) according to the input to the input device 75 .

Next, the analysis unit 103 identifies an analysis target period in the search period (step S22). For example, based on the production plan information, the analysis unit 103 identifies a period obtained by excluding the planned suspension period (for example, lunch break 12:00 to 13:00 on October 1, 2021) from the search period as the analysis target period. . The analysis unit 103 may acquire the production plan information from the input device 75, or may acquire the production plan information from a production control server (not shown).

Next, the analysis unit 103 performs the process of step S23. In step S<b>23 , the analysis unit 103 extracts from the entrance/exit information 27 a record that indicates the staying time period included in the analysis target period and that corresponds to the process Pr(1). In addition, the analysis unit 103 extracts records indicating the operating hours included in the analysis target period from the machine work information 344 corresponding to the process Pr(1). Furthermore, the analysis unit 103 extracts records indicating abnormal time periods included in the analysis target period from the error information 345 corresponding to the process Pr(1).

Next, the analysis unit 103 identifies a plurality of cycles in which cooperative work was normally performed in the analysis target period (step S24). Specifically, the analysis unit 103 identifies all cycles performed during the analysis target period based on the work end time of the record extracted from the machine work information 344 in step S13. That is, the analysis unit 103 identifies the period between two work end times described in two consecutive records as one cycle in which cooperative work was performed. All cycles identified in this manner may include cycles in which anomalies such as retries and momentary stoppages have occurred. Therefore, the analysis unit 103 excludes, from all identified cycles, cycles that overlap with the abnormal time zone indicated by any record extracted from the error information 345 in step S23. As a result, a plurality of cycles in which cooperative work was successfully performed are identified in the analysis target period.

Next, for each of the plurality of cycles in which the cooperative work was normally performed, the analysis unit 103 determines the end timing T1 of the main work in the previous cycle, A time difference (T1-T2) from the worker's arrival timing T2 is calculated (step S25). The method of calculating the time difference (T1-T2) is as described above.

Next, the analysis unit 103 calculates the time for each state of the machine 40(1) in the analysis target period (step S26). Specifically, the analysis unit 103 calculates the following times in the analysis target period.
・The time during which this work was performed normally (hereinafter referred to as the "total work time"),
- The time spent waiting for the end of the input work after the worker started the input work (hereinafter referred to as the "total waiting time until the end of input work"),
- The time spent waiting for the start of input work by the worker (that is, the "total second waiting time"),
・The time during which the product does not operate normally due to an abnormality such as retry or momentary stop (hereinafter referred to as "total abnormal stop time"),
- Remaining non-operating time (for example, including the time spent waiting for the end of the work after the start of setup work, repair work for an abnormality, etc.).

The analysis unit 103 counts the number of cycles specified in step S24, that is, the number of cycles in which the cooperative work was performed normally (hereinafter referred to as "the number of normal cycles"). The analysis unit 103 calculates the product of the time required for the main work and the number of normal cycles as the "total main work time". The time required for this work is determined in advance, as described above.

The analysis unit 103 calculates the product of the time required for the loading operation and the number of normal cycles as the "total waiting time until the completion of loading". The time required for the loading operation is determined in advance by, for example, measurement using a stopwatch.

The analysis unit 103 selects the time difference (T1-T2) having a negative value from the time difference (T1-T2) for each cycle calculated in step S25. The analysis unit 103 calculates the sum of the absolute values of the selected time differences (T1-T2) as the "total second waiting time".

The analysis unit 103 calculates the total time of the abnormal time period included in the analysis target period as the “total abnormal stop time”.

The analysis unit 103 removes the “total main work time”, “total waiting time until input completion”, “total second waiting time”, and “total abnormal stop time” from the total time of the analysis target period. calculated as the “remaining non-working time”.

Next, the analysis unit 103 divides the "total time of the main work" by the total time of the analysis target period, so that the main work performed by the machine 40(1) in the cooperative process Pr(1) during the analysis target period. A first operation rate is calculated that indicates the ratio of the time that is set (step S27). That is, the first operating rate is the operating rate of machine 40(1).

Next, the analysis unit 103 calculates the time for each state of the worker in the analysis target period (step S28). Specifically, the analysis unit 103 calculates the following times in the analysis target period.
- Time spent performing input work in the cooperative process (hereinafter referred to as "total input work time"),
・Working time in processes other than cooperative processes (hereinafter referred to as "total working time in other processes"),
・In the cooperative process, the time during which work other than input work such as setup is performed (hereinafter referred to as "total work time such as setup"),
• In the cooperative process, the time spent waiting for the machine 40(1) to finish the main work (that is, the "total first waiting time").

The analysis unit 103 calculates the product of the time required for the preliminary work and the number of normal cycles as the "total input work time". Therefore, the "total input work time" is the same as the "total standby time until completion of input" calculated for the machine 40(1).

The analysis unit 103 calculates the total amount of time that the worker stayed at the work site of the process Pr(1) based on the record extracted from the entrance/exit information 27 in step S23. The analysis unit 103 calculates the "total work time in other processes" by subtracting the total time spent by workers at the work site of process Pr(1) from the total time of the analysis target period. .

The analysis unit 103 selects the time difference (T1-T2) having a positive value from the time difference (T1-T2) for each cycle calculated in step S25. The analysis unit 103 calculates the sum of the selected time differences (T1-T2) as the "total first waiting time".

The analysis unit 103 determines the time obtained by subtracting the "total input work time", the "total work time in other processes", and the "total first waiting time" from the total time of the analysis target period as the "work time for setup, etc." calculated as the sum of

Next, the analysis unit 103 divides the total of "total input work time", "total work time in other processes", and "total work time such as setup" by the total time of the analysis target period. , in the analysis target period, a second operating rate is calculated that indicates the proportion of time that the worker was working in any of the plurality of processes Pr (step S29). That is, the second operation rate is the worker's operation rate.

Next, the analysis unit 103 divides the total time of the analysis target period by the number of normal cycles to calculate the average cycle time of the cooperative process Pr(1) during the analysis target period (step S30). The average cycle time is the average cycle time of repeated collaborative work. Cycle time is the time of each cycle.

(Flow of subroutine in step S12)
FIG. 13 is a flow chart showing the flow of the subroutine of step S12 shown in FIG.

First, the analysis unit 103 selects one amount of change from a plurality of predetermined amounts of change (step S31). The multiple amounts of change include positive values and negative values.

Next, the analysis unit 103 changes the cycle-by-cycle time difference (T1-T2) calculated in step S25 by the selected amount of change (step S32). That is, the analysis unit 103 changes the arrival timing of the worker to the work site of the cooperative process Pr(1).

Next, the analysis unit 103 calculates the first operating rate, the second operating rate, and the average cycle time based on the changed time difference (T1-T2) (step S33). That is, the analysis unit 103 simulates fluctuations in the first operating rate and the second operating rate when the arrival timing of workers at the work site of the cooperative process Pr(1) is changed.

FIG. 14 is a diagram for explaining the processing of steps S32 and S33. FIG. 14 shows the frequency distribution 200 of the time difference (T1-T2) calculated in step S25 and the frequency distribution 202 of the time difference (T1-T2) changed in step S32. As shown in FIG. 14, the shape of frequency distribution 202 is the same as that of frequency distribution 200 because the time difference (T1-T2) of all cycles is changed by the same change amount α. However, the class values are different by the amount of change α.

The time difference (T1-T2) for each cycle depends on the worker's arrival timing at the work site of the cooperative process Pr(1). Therefore, even if the time difference (T1-T2) for each cycle is changed, the "total main work time", "total waiting time until completion of loading", "total abnormal stop time", and "Remaining Downtime" are maintained. A "normal cycle count" is also maintained.

On the other hand, the "total second standby time" calculated in step S26 changes according to changes in the time difference (T1-T2) for each cycle. Therefore, the analysis unit 103 selects the time difference (T1-T2) that takes a negative value from the time difference (T1-T2) after the change, and calculates the sum of the absolute values of the selected time differences (T1-T2) as the "th 2 Waiting time total". In FIG. 14, the area of region 210 represents the "total second waiting time".

The analysis unit 103 calculates the post-change first operating rate using the "total second waiting time" calculated using the post-change time difference (T1-T2). Since the "second total waiting time" has changed, it is also necessary to change the denominator for calculating the first operating rate, that is, the total time of the analysis target period. That is, the analysis unit 103 calculates the "total second waiting time" calculated using the changed time difference (T1-T2), the "total main work time" calculated in step S26, and the "waiting time until the end of input The sum of "total time", "total abnormal stop time", and "remaining machine non-operating time" may be used as the denominator (total time of the analysis target period after change).

Further, the analysis unit 103 divides the total time of the analysis target period after the change by the number of normal cycles to calculate the average cycle time after the change.

Similarly, even if the time difference (T1-T2) for each cycle is changed, the "total input work time" and "total work time such as setup" calculated in step S28 are maintained.

On the other hand, the "total first waiting time" calculated in step S28 changes according to changes in the time difference (T1-T2) for each cycle. Therefore, the analysis unit 103 selects the time difference (T1-T2) that takes a positive value from the time difference (T1-T2) after the change, and calculates the sum of the absolute values of the selected time differences (T1-T2) as the "th Recalculate as "total of 1 waiting time". In FIG. 14, the area of region 212 represents the "total first waiting time".

Furthermore, by changing the time difference (T1-T2) for each cycle by the amount of change α, the working time of processes other than the cooperative process is reduced by the product of the amount of change α and the number of normal cycles. Therefore, the analysis unit 103 calculates the changed "total work time in other processes" by subtracting the product from the "total work time in other processes" calculated in step S28.

The analysis unit 103 calculates the total of the changed "total work time in other processes" and the "total input work time" and "total work time for setup, etc." The second operation rate after change is calculated by dividing by the total time of the period.

Next, the analysis unit 103 determines whether or not all of the predetermined variation amounts have been selected (step S34). If NO in step S34, the subroutine of step S12 returns to step S31 to select a new amount of change. If YES in step S34, the subroutine of step S12 ends.

<Screen example>
Examples of screens provided by the providing unit 104 will be described with reference to FIGS. 15 to 17 .

FIG. 15 is a diagram showing an example of a screen showing analysis results. A screen 60 shown in FIG. 15 is provided by the providing unit 104 and displayed on the display device 70, for example. As shown in FIG. 15, screen 60 includes graphs 61-63 and buttons 64-66.

A graph 61 shows changes over time in the first standby time and the second standby time for each cycle. A graph 62 shows the change over time of the cumulative value of the first waiting time. A graph 63 shows changes over time in the cumulative value of the second waiting time. The horizontal axes of the graphs 61 to 63 indicate the cumulative number of cycles of the cooperative process Pr(1) that are repeatedly executed, and correspond to time.

By checking the screen 60, the user should take measures to reduce either the first waiting time or the second waiting time in order to improve the work of the production site 2 including the cooperative process Pr(1). can recognize Thus, the analysis device 10 can provide information suitable for improving the work of the production site 2 including the cooperative process Pr(1). The screen 60 may include at least one of the graphs 61-63.

The providing unit 104 causes the screen of the display device 70 to transition from the screen 60 to the screen shown in FIG. 16 in response to the button 64 being clicked. The providing unit 104 causes the screen of the display device 70 to transition from the screen 60 to the screen shown in FIG. 17 in response to the button 65 being clicked. The providing unit 104 ends providing the screen 60 in response to the button 66 being clicked.

FIG. 16 is a diagram showing another first example of a screen showing analysis results. A screen 80 shown in FIG. 16 is provided by the providing unit 104 and displayed on the display device 70, for example. As shown in FIG. 16, screen 80 includes graphs 81 to 84 and button 86 .

Graph 81 shows the “total waiting time until completion of loading” (denoted as “input work” in the figure), the “total working time”, and the “second waiting time” calculated in step S26 in the analysis target period. "Total" (indicated as "Waiting for worker" in the figure). “Total waiting time until completion of loading” is the total time during which the worker is performing loading work in the analysis target period. "Total time of this work" is the total time during which this work was performed in the analysis target period. "Total second waiting time" is the total time during which the machine 40(1) waits for the worker to arrive at the work site of the cooperative process after the main work of the previous cycle is completed in the analysis target period. .

A graph 82 shows the "total input work time", "total work time in other processes", and "total first waiting time" ("waiting for machine" in the figure) calculated in step S28 during the analysis target period. notation). The “total input work time” is the total time during which the input work was performed in the analysis target period. The "total working hours in other processes" is the total working hours of workers in processes other than the process Pr(1) among the plurality of processes Pr in the analysis target period. "Total first waiting time" is the total time during which the worker waits for the end of the main work in the previous cycle in the analysis target period.

Graph 83 is a histogram of cycle times. The providing unit 104 generates a histogram of the times (cycle times) of all cycles performed during the analysis target period. The cycle time is the time from the end time of the main work in the previous cycle to the end time of the main work in the target cycle. A graph 83 shows the most frequent cycle time CT0.

A graph 84 shows the variation of the first operating rate and the second operating rate according to changes in the average cycle time. A line 84a indicates the variation in the first operating rate, and a line 84b indicates the variation in the second operating rate. The graph 84 is obtained by executing the above steps S32 and S33 a plurality of times with different amounts of change.

By checking the graph 84, the user can grasp the relationship between the first operating rate and the second operating rate. The first operating rate becomes lower as the time for which the machine 40(1) waits for the start of input work becomes longer. The second operation rate becomes lower as the worker waits for the end of the main work in the previous cycle to become longer. In the cooperative process Pr(1), generally, it may be necessary to decrease the first operating rate in order to increase the second operating rate. Conversely, it may be necessary to decrease the second operating rate in order to increase the first operating rate. Therefore, by checking the graph 84, the user can determine whether the first operating rate and the second operating rate are within the allowable range, and can take appropriate measures according to the production site.

For example, when the second operating rate is low in a state of excessive production, the user determines that it is preferable to increase the second operating rate. Then, from the relationship between the first operating rate and the second operating rate, the user can easily grasp how much the second operating rate can be increased while the first operating rate falls within the allowable range.

Alternatively, during a busy period when it is necessary to increase the production volume, the user can check the result of the simulation processing to determine whether there is room to increase the first operating rate, and whether or not there is room for increasing the first operating rate. It is possible to determine whether or not it is necessary to allocate workers.

When the button 86 is clicked, the providing unit 104 ends providing the screen 80 and provides the screen 60 shown in FIG. 15 again.

FIG. 17 is a diagram showing another second example of the screen showing analysis results. Screen 90 shown in FIG. 17 is provided in response to button 65 of screen 60 shown in FIG. 15 being clicked. As shown in FIG. 17, screen 90 includes areas 91 and 92 and button 93 .

A region 91 displays a graph showing changes over time in the cycle time of the cooperative process Pr(1). Note that the provision unit 104 may create the graph based on all the cycles performed during the analysis target period, or may create the graph based only on the cycles in which the collaborative work was performed normally. good. The minimum cycle time is the total time (MCT (machine cycle time)) of the time required for input work and the time required for main work.

In the area 92, a Gantt chart 93a indicating the time period during which the input work was performed and a Gantt chart 93b indicating the time period during which this work was performed are displayed. In region 92, dashed line 94 indicates the end timing of each cycle.

The worker arrives at the work site before the timing indicated by dashed line 94a. Therefore, the worker can start loading work for the next cycle at the timing when this work is finished. As a result, the next cycle time (cycle time) (ie, the time from the timing indicated by dashed line 94a to the timing indicated by dashed line 94b) is relatively short.

The worker arrives at the work site after the timing indicated by dashed line 94c. Therefore, the worker cannot start input work for the next cycle at the timing when this work is finished. Therefore, the next cycle time (cycle time) (that is, the time from the timing indicated by dashed line 94c to the timing indicated by dashed line 94d) is relatively long.

When the button 93 is clicked, the providing unit 104 ends providing the screen 90 and provides the screen 60 shown in FIG. 15 again.

<Modification>
In the above description, the multiple processes Pr include only the process Pr(1) as a cooperative process. However, the multiple processes Pr may include two or more processes Pr as cooperative processes. In this case, the providing unit 104 may calculate the first operation rate of each of the two or more processes Pr that are cooperative processes.

FIG. 18 is a diagram showing another third example of the screen showing analysis results. FIG. 18 shows a screen 95 provided when two processes Pr exist as cooperative processes. As shown in FIG. 18, screen 95 includes areas 96-98.

In an area 96, there are displayed the "total waiting time until completion of loading", the "total main work time", and the "second waiting time" calculated for one of the two cooperative processes Pr during the analysis target period. A graph showing the percentage of each of the "total of

In an area 97, there are displayed the "total waiting time until completion of loading", the "total main work time", and the "second waiting time" calculated for the other of the two cooperative processes Pr during the analysis target period. A graph showing the percentage of each of the "total of

In an area 98, the "total input work time" calculated for each of the two processes Pr, which are cooperative processes, during the analysis target period (indicated as "machine 1 input work" and "machine 2 input work" in the figure). ) and the “total first waiting time” (indicated as “waiting for machine 1” and “waiting for machine 2” in the figure).

§3 Supplementary Note As described above, the present embodiment includes the following disclosures.

(Configuration 1)
An analysis device (10) for analyzing the work status of a production site (2) including a plurality of processes (Pr),
The plurality of steps (Pr) includes a cooperative step (Pr(1)) in which cooperative work between the worker and the machine (40(1)) is repeatedly performed in each cycle,
the cooperative work includes a first work by the worker and a second work performed by the machine (40(1)) after the first work;
The analysis device (10)
a first acquisition unit (101, 11) for acquiring first information (344) indicating a first time period in which the second work was performed;
a second acquisition unit (102, 11) for acquiring second information (27) indicating a second time period during which the worker stayed at the work site of the cooperative process;
an analysis unit (103, 11) that analyzes the work situation using the first information (344) and the second information (27);
a providing unit (104, 11) for providing a screen (80, 90, 95) showing an analysis result by the analysis unit (103, 11);
The screen (60) displays a first waiting time during which the worker is waiting for the completion of the second work, and a waiting time for the machine (40(1)) to go to the work site after the completion of the second work. an analysis device (10) showing a second waiting time awaiting the arrival of workers;

(Configuration 2)
Said screen (60)
a first graph (61) showing changes over time of the first waiting time and the second waiting time;
a second graph (62) showing the change over time of the cumulative value of the first waiting time;
and a third graph (63) showing the temporal change of the cumulative value of the second waiting time.

(Composition 3)
The analysis unit (103, 11)
Calculating a first operation rate that indicates the proportion of time that the second work was performed in the analysis target period,
Calculating a second operating rate that indicates the proportion of time that the worker was performing work in one of the plurality of steps (Pr) during the analysis target period,
executing a simulation process for simulating fluctuations in the first operation rate and the second operation rate when the arrival timing of the worker at the work site in the cooperative process is changed;
3. The analyzer (10) according to configuration 1 or 2, wherein the screen shows results of the simulation process.

(Composition 4)
For each cycle included in the analysis target period, the analysis unit (103, 11) determines the end timing of the second work in the previous cycle and the cooperation process (Pr(1 )) to calculate the time difference from the arrival timing of the worker at the work site,
The simulation process includes
The analysis device (10) according to configuration 3, comprising a calculation process for calculating the first operation rate and the second operation rate when the time difference for each cycle is changed by a designated amount of change.

(Composition 5)
The analysis unit (103, 11) calculates an average cycle time of the cooperative work in the analysis target period,
The calculation process further includes calculating the average cycle time when the time difference is changed by the amount of change,
The analysis unit (103, 11) performs the calculation process a plurality of times with different amounts of change,
The analyzer (10) according to configuration 4, wherein the screen (80) includes a first graph (84) showing variations in the first operating rate and the second operating rate in response to changes in the average cycle time. ).

(Composition 6)
4. The analyzer (10) of any of the preceding configurations, wherein the screen (90) includes a fifth graph showing the change in cycle time of the coordination process over time.

(Composition 7)
The screen (90) includes a first Gantt chart (93a) indicating the time period during which the first work was performed, and a second Gantt chart (93b) indicating the time period during which the second work was performed. 7. An analyzer (10) according to any of the configurations 1 to 6, comprising:

(Composition 8)
3. The analysis device according to configuration 1 or 2, wherein said screen (80) includes a sixth graph (82) showing a ratio of each of the time during which said first task was performed and the total of said first waiting time. (10).

(Composition 9)
Analysis according to claim 1 or 2, wherein said screen (80) comprises a seventh graph (81) showing respective proportions of said second task performed and said total second waiting time. A device (10).

(Configuration 10)
An analysis method for analyzing the work status of a production site (2) including a plurality of processes (Pr),
The plurality of steps (Pr) includes a cooperative step (Pr(1)) in which cooperative work between the worker and the machine (40(1)) is repeatedly performed in each cycle,
the cooperative work includes a first work by the worker and a second work performed by the machine (40(1)) after the first work;
The analysis method is
obtaining first information (344) indicating a first time period during which the second task was performed;
a step of acquiring second information (27) indicating a second time period during which the worker stayed at the work site of the cooperative process;
analyzing the work situation using the first information (344) and the second information (27);
providing a screen (80, 90, 95) showing analysis results;
The screen (60) displays a first waiting time during which the machine is waiting for the worker to arrive at the work site after finishing the second job, and a waiting time for the worker waiting for the worker to finish the second job. and a second waiting time.

(Composition 11)
A program that causes a computer to execute the analysis method according to configuration 10.

Although the embodiments of the present invention have been described, the embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope of equivalence to the scope of claims.

1 system, 2 production site, 10 analyzer, 11, 21, 31 processor, 12, 22 memory, 13, 23, 34 storage, 14 display controller, 15 input interface, 16, 25 communication interface, 17 analysis program, 20 information Processing device 24 Camera interface 26 Entrance/exit information generation program 27 Entrance/exit information 30 Control device 32 Chipset 33 Main memory 35 Control system network controller 36 Information system network controller 37 USB controller 38 Memory card Interface, 40 Machine, 50 Camera, 60, 80, 90, 95 Screen, 61-63, 81-84 Graph, 64-66, 86, 93 Button, 70 Display device, 75 Input device, 91, 92, 96-98 , 210, 212 area, 93a, 93b Gantt chart, 101 first acquisition unit, 102 second acquisition unit, 103 analysis unit, 104 provision unit, 110 storage unit, 200, 202 frequency distribution, 228 memory card, 341 system program, 342 user program, 343 management program, 344 machine work information, 345 error information, Ap rectangular area, Ar monitoring area, Pe operator, Pp position, Pr process, Pr(1) cooperative process.

Claims (11)

An analysis device for analyzing work conditions at a production site including multiple processes,
The plurality of steps includes a cooperative step in which cooperative work between a worker and a machine is repeatedly performed for each cycle,
The cooperative work includes a first work by the worker and a second work performed by the machine after the first work,
The analysis device is
a first acquisition unit that acquires first information indicating a first time period in which the second work was performed;
a second acquisition unit that acquires second information indicating a second time period during which the worker stayed at the work site of the cooperative process;
an analysis unit that analyzes the work situation using the first information and the second information;
a providing unit that provides a screen showing analysis results by the analysis unit;
The screen includes a first waiting time during which the worker is waiting to finish the second job, and a waiting time for the machine to wait for the worker to arrive at the job site after finishing the second job. and a second waiting time. The screen
a first graph showing changes over time of the first waiting time and the second waiting time;
a second graph showing the change over time of the cumulative value of the first waiting time;
2. The analysis device according to claim 1, comprising at least one of a third graph showing a temporal change of the cumulative value of said second waiting time. The analysis unit
Calculating a first operation rate that indicates the proportion of time that the second work was performed in the analysis target period,
Calculating a second operation rate indicating the proportion of time during which the worker was performing work in one of the plurality of processes during the analysis target period,
executing a simulation process for simulating fluctuations in the first operation rate and the second operation rate when the arrival timing of the worker at the work site in the cooperative process is changed;
3. The analyzer according to claim 1, wherein said screen shows a result of said simulation processing. For each cycle included in the analysis target period, the analysis unit determines the end timing of the second work in the previous cycle and the worker's arrival time at the work site of the cooperative process for the first work in the target cycle. Calculate the time difference from the arrival timing,
The simulation process includes
4. The analysis apparatus according to claim 3, further comprising a calculation process of calculating said first operation rate and said second operation rate when said time difference for each cycle is changed by a specified amount of change. The analysis unit calculates an average cycle time of the cooperative work in the analysis target period,
The calculation process further includes calculating the average cycle time when the time difference is changed by the amount of change,
The analysis unit executes the calculation process a plurality of times with different amounts of change,
5. The analyzer according to claim 4, wherein said screen includes a fourth graph showing variations in said first operating rate and said second operating rate according to changes in said average cycle time. 6. The analyzer according to any one of claims 1 to 5, wherein said screen includes a fifth graph showing changes in cycle time of said cooperative process over time. 7. The screen according to any one of claims 1 to 6, wherein the screen includes a first Gantt chart indicating the time period during which the first work was performed, and a second Gantt chart indicating the time period during which the second work was performed. 1. The analyzer according to 1. The analysis device according to claim 1 or 2, wherein the screen includes a sixth graph showing respective ratios of the time during which the first work was performed and the total of the first waiting time in the analysis target period. . The analyzer according to claim 1 or 2, wherein the screen includes a seventh graph showing respective ratios of the time during which the second work was performed and the total of the second waiting time in the analysis target period. . An analysis method for analyzing the work status of a production site including multiple processes,
The plurality of steps includes a cooperative step in which cooperative work between a worker and a machine is repeatedly performed for each cycle,
The cooperative work includes a first work by the worker and a second work performed by the machine after the first work,
The analysis method is
obtaining first information indicating a first time period in which the second work was performed;
a step of acquiring second information indicating a second time period during which the worker stayed at the work site of the cooperative process;
analyzing the work situation using the first information and the second information;
providing a screen showing the results of the analysis;
The screen includes a first waiting time during which the machine is waiting for the arrival of the worker at the work site after completing the second work, and a first waiting time during which the worker is waiting for the completion of the second work. and a second waiting time. A program that causes a computer to execute the analysis method according to claim 10 .

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