Manufacturing process control device, manufacturing process control method, control program, and recording medium

Abstract

To provide information that enables consideration on whether or not an improvement is necessary in view of not only an individual factor such as an in-proces inventory quantity or an operation rate but also relations between such factors.SOLUTION: A production process managing device (10) includes: an obtaining unit (20) that obtains an in-process inventory quantity of a production proces and an operation rate thereof; and a graph displaying unit (30) that displays, as a list, a relation between the in-process inventory quantity and the operation rate on a graph.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a manufacturing process management apparatus and the like that manage manufacturing processes included in a production line. [Background Art]

[0002] Products are manufactured through a plurality of manufacturing processes. For inventory management in these manufacturing processes, for example, Patent Document 1 describes a work-in-progress display device that displays the amount of work-in-progress inventory for each process. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2004-94770 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] For each of a plurality of manufacturing processes in a production line, or for each of the same manufacturing process in a plurality of production lines, the present invention provides information that allows examination of whether improvement is necessary by considering not only individual factors such as work-in-progress inventory amount and operation rate individually, but also the relationship between these factors. [Means for Solving the Problem]

[0005] In order to solve the above problem, a manufacturing process management apparatus according to an aspect of the present disclosure includes: an acquisition unit that acquires a work-in-progress inventory amount and an operation rate for each of the manufacturing processes in a production line including a plurality of manufacturing processes, or acquires a work-in-progress inventory amount and an operation rate of the same manufacturing process for each production line in a plurality of production lines including the same manufacturing process; and a graph display unit that displays a list of relationships between the work-in-progress inventory amount and the operation rate for each manufacturing process in a graph, or displays a list of relationships between the work-in-progress inventory amount and the operation rate of the same manufacturing process for each production line in a graph.

[0006] To solve the aforementioned problems, a manufacturing process management method according to one aspect of the present disclosure includes an acquisition step of acquiring the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or acquiring the amount of work-in-progress inventory and the utilization rate for the same manufacturing process in multiple manufacturing lines that include the same manufacturing process, and a graph display step of displaying the relationship between the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a graph, or displaying the relationship between the amount of work-in-progress inventory and the utilization rate for the same manufacturing process in a graph for each manufacturing line. [Effects of the Invention]

[0007] According to one aspect of this disclosure, it is possible to present information that allows for the consideration of whether improvement is necessary not only from the perspective of individual elements, but also from the perspective of the overall trend. [Brief explanation of the drawing]

[0008] [Figure 1] A functional block diagram showing the main components of a manufacturing process control device according to Embodiment 1 of this disclosure. [Figure 2] This figure shows the relationship between the operating rate of each manufacturing process and the amount of work-in-progress inventory. [Figure 3] This diagram shows the relationship between the operating rate of each manufacturing process and the amount of work-in-progress inventory over time. [Figure 4] This figure shows the inventory levels for each piece of manufacturing equipment in the manufacturing process, and the time-dependent changes in the operating rate of the manufacturing process. [Figure 5] A functional block diagram showing the main components of a manufacturing process control device according to Embodiment 2 of this disclosure. [Figure 6] This figure shows the relationship between the operating rate of each production line and the amount of work-in-progress inventory in a particular manufacturing process. [Modes for carrying out the invention]

[0009] [Embodiment 1] Hereinafter, one embodiment of the present disclosure will be described in detail. The manufacturing process management device 10 according to this embodiment displays the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process in a graph. This allows managers to consider the need for improvement by taking both the amount of work-in-progress inventory and the operating rate into account, without being biased towards either one. In other words, they can consider the need for improvement not only from the perspective of individual elements but also from the overall trend.

[0010] Figure 1 is a functional block diagram showing the main components of the manufacturing process control device 10. As shown in Figure 1, the manufacturing process control device 10 includes an acquisition unit 20 and a graph display unit 30.

[0011] The acquisition unit 20 acquires the amount of work-in-progress inventory and the utilization rate for each manufacturing process from the manufacturing equipment that performs each of the manufacturing processes A to D included in the manufacturing line L. The utilization rate is, for example, the ratio of the number of products manufactured at that time to the number of products manufactured when the manufacturing process is at its maximum capacity.

[0012] The graph display unit 30 displays the relationship between work-in-progress inventory and operating rate for each manufacturing process as a graph on the display device 40.

[0013] Refer to Figure 2 to see an example of the list display shown by the graph display unit 30. Figure 2 is a diagram showing the relationship between the operating rate and the amount of work-in-progress inventory for each manufacturing process. In the example shown in Figure 2, the vertical axis represents the operating rate and the horizontal axis represents the amount of work-in-progress inventory, showing the operating rate and the amount of work-in-progress inventory for each manufacturing process at a given point in time.

[0014] In this way, by showing the relationship between the operating rate and the amount of work-in-progress inventory for each manufacturing process, it is easy to identify which processes are performing well and which require improvement. For example, in the example shown in Figure 2, manufacturing process A is performing well because it has a high operating rate and a low amount of work-in-progress inventory. On the other hand, manufacturing process D has a large amount of work-in-progress inventory, which may be a bottleneck in the manufacturing line, and it can be determined that improvement is needed. As for manufacturing processes B and C, at this point, they are neither particularly good nor bad, and it can be decided to continue monitoring the situation.

[0015] Further, the graph display unit 30 displays an area 201 in the graph to be displayed. The area 201 indicates an area where the operation rate and the work-in-progress inventory quantity are in an ideal state. In the example shown in FIG. 2, the operation rate and work-in-progress inventory quantity of manufacturing process A are within the ideal area. By displaying the area 201, a manager can easily recognize whether the relationship between the work-in-progress inventory quantity and the operation rate is in an ideal state. The ideal area is, for example, an area where the operation rate is equal to or higher than a preset reference and the work-in-progress inventory quantity is equal to or lower than a preset reference.

[0016] Further, the graph display unit 30 displays a line 202 in the graph to be displayed. The line 202 indicates an improvement line for work-in-progress inventory quantity. If the work-in-progress inventory quantity exceeds the line 202, it is determined that improvement is necessary. In the example shown in FIG. 2, the work-in-progress inventory quantity of manufacturing process D exceeds the line 202, so improvement is required.

[0017] The graph display unit 30 may display an index for determining whether improvement is necessary as an area instead of indicating it with the line 202. For example, an area where the work-in-progress inventory quantity is equal to or greater than a first predetermined value and the operation rate is equal to or less than a second predetermined value may be displayed as an improvement area. Accordingly, the manager can easily recognize whether improvement is necessary including not only the work-in-progress inventory quantity but also the operation rate.

[0018] Further, the graph display unit 30 may display a list showing how the relationship between the operation rate and the work-in-progress inventory quantity changes over time. FIG. 3 is a diagram showing the relationship between the operation rate and the work-in-progress inventory quantity for each manufacturing process as it changes over time.

[0019] In the example shown in FIG. 3, it can be seen that for manufacturing process A, the point remains within the area 201 even as time passes. For manufacturing process B, it can be seen that the operation rate improves as time passes. For manufacturing process C, it can be seen that although the operation rate improves as time passes, the work-in-progress inventory quantity increases. For manufacturing process D, it can be seen that even as time passes, the work-in-progress inventory quantity has not changed from the state requiring improvement.

[0020] As described above, by showing changes over time in the relationship between the operation rate and the amount of work-in-process inventory, it is possible to recognize temporal changes in the relationship between the amount of work-in-process inventory and the operation rate for each manufacturing process. This allows a manager to recognize, for each manufacturing process, whether the relevant manufacturing process is moving in an improving direction, remaining in the same state, or moving in a worsening direction.

[0021] Furthermore, when each manufacturing process is processed by a plurality of manufacturing apparatuses, the graph display unit 30 may display the amount of work-in-process inventory for each manufacturing apparatus.

[0022] Furthermore, the graph display unit 30 may display temporal changes in the operation rate in each manufacturing process. This will be described with reference to FIG. 4. FIG. 4 is a diagram showing the number of inventories for each manufacturing apparatus in a manufacturing process and temporal changes in the operation rate in the manufacturing process.

[0023] In the example shown in FIG. 4, a graph 400 in which the vertical axis represents the number of work-in-process inventories and the horizontal axis represents manufacturing processes, and graphs 411 to 414 showing changes in the operation rate over a predetermined period in each manufacturing process are illustrated.

[0024] The graph 400 shows, for each manufacturing process, the number of work-in-process inventories for each manufacturing apparatus included in the relevant manufacturing process at a certain point in time. In the graph 400, each manufacturing apparatus is indicated by 401. Therefore, in the example shown in the graph 400, the manufacturing process A includes five manufacturing apparatuses, the manufacturing process B includes nine manufacturing apparatuses, the manufacturing process C includes eight manufacturing apparatuses, and the manufacturing process D includes thirteen manufacturing apparatuses. Then, in the manufacturing process A, work-in-process inventory occurs in the three manufacturing apparatuses from the left; in the manufacturing process B, work-in-process inventory occurs in the 1st, 3rd, 5th, and 8th manufacturing apparatuses from the left; in the manufacturing process C, work-in-process inventory occurs in the 1st and 3rd manufacturing apparatuses from the left; and in the manufacturing process D, work-in-process inventory occurs in the 3rd, 7th, 11th, and 13th manufacturing apparatuses.

[0025] Furthermore, the graph display unit 30 displays the temporal changes in the operating rate of each manufacturing process in the order of the manufacturing processes on a single production line. In the example shown in Figure 2, graph 411 showing the change in the operating rate of manufacturing process A, graph 412 showing the change in the operating rate of manufacturing process B, graph 413 showing the change in the operating rate of manufacturing process C, and graph 414 showing the change in the operating rate of manufacturing process D are displayed in this order.

[0026] Graphs 411 to 414 show the utilization rate for each manufacturing process during a predetermined period, including the point in time when the work-in-progress inventory level is shown in Graph 400. The utilization rates shown in Graphs 411 to 414 are the average utilization rates of the multiple manufacturing machines included in each manufacturing process.

[0027] Graph 411 shows that the utilization rate of manufacturing process A is roughly flat. Graph 412 shows that the utilization rate of manufacturing process B is also roughly flat at a low value. Graph 413 shows that the utilization rate of manufacturing process C is increasing. Graph 414 shows that the utilization rate of manufacturing process D initially increased, then decreased, then increased again, and has since leveled off.

[0028] In this way, by showing the inventory levels for each manufacturing machine in the manufacturing process and the time-dependent changes in the operating rate of the manufacturing process, managers can recognize the work-in-progress inventory levels for each manufacturing machine included in the manufacturing process, as well as the time-dependent changes in the operating rate of the manufacturing process. Furthermore, managers can see a list of the work-in-progress inventory levels for each manufacturing machine and the time-dependent changes in the operating rate of the manufacturing process, in the order of the manufacturing process.

[0029] The graph display unit 30 may display the time-dependent changes in the operating rate of only a specified number of manufacturing processes, rather than the time-dependent changes in the operating rate of all manufacturing processes included in the production line. If there are few manufacturing processes included in the production line, it is possible to display the operating rate of all manufacturing processes, but as the number of manufacturing processes increases, this may put pressure on the display area. By displaying the operating rate of only a specified number of manufacturing processes, the display area of ​​the display device can be used efficiently.

[0030] The display device 40 is a display that shows information. The display device 40 may be included in the manufacturing process control device 10, or it may be provided as a separate device outside the manufacturing process control device 10.

[0031] As described above, the manufacturing process control device 10 includes an acquisition unit 20 that acquires the amount of work-in-progress inventory and the operating rate for each manufacturing process of a manufacturing line L that includes multiple manufacturing processes (manufacturing process A, manufacturing process B, manufacturing process C, and manufacturing process D), and a graph display unit 30 that displays the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process in a graph.

[0032] This allows managers to easily see the relationship between work-in-progress inventory levels and utilization rates for each manufacturing process. This enables them to consider both factors, rather than focusing solely on one, when determining whether improvements are needed. In other words, they can assess the need for improvements based on overall trends, not just individual elements.

[0033] [Embodiment 2] Other embodiments of this disclosure are described below. For convenience of explanation, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0034] In the above-described embodiment 1, the manufacturing process management device 10 displayed a list of the relationship between the work-in-progress inventory and the operating rate for each of the multiple manufacturing processes included in a single manufacturing line. In this embodiment, the manufacturing process management device 10 displays a list of the relationship between the work-in-progress inventory and the operating rate for each manufacturing line of the same manufacturing process included in multiple manufacturing lines L1 to L4. This allows the manager to easily recognize the differences in the relationship between the work-in-progress inventory and the operating rate in the same manufacturing process.

[0035] In the following explanation, we will assume that the work-in-progress inventory quantity and utilization rate for manufacturing process A are obtained and displayed in a list. However, it is also possible to obtain and display the work-in-progress inventory quantity and utilization rate for manufacturing processes B, C, and D as well.

[0036] Figure 5 shows a functional block diagram illustrating the main components of the manufacturing process control device 10 according to this embodiment. As shown in Figure 5, the configuration of the manufacturing process control device 10 itself is the same as that of the manufacturing process control device 10 in Embodiment 1 described above. In this embodiment, the acquisition unit 20 acquires the amount of work-in-progress inventory and the operating rate from the manufacturing equipment that performs the processing of manufacturing process A included in each of the multiple manufacturing lines L1 to L4.

[0037] The graph display unit 30 displays the relationship between work-in-progress inventory and operating rate for each manufacturing line as a graph on the display device 40.

[0038] Refer to Figure 6 to see an example of the list display shown by the graph display unit 30. Figure 6 is a diagram showing the relationship between the operating rate and the amount of work-in-progress inventory for each manufacturing line. In the example shown in Figure 6, the vertical axis represents the operating rate and the horizontal axis represents the amount of work-in-progress inventory, showing the operating rate and the amount of work-in-progress inventory for manufacturing process A at a given point in time for each manufacturing line (manufacturing line L1, manufacturing line L2, manufacturing line L3, manufacturing line L4).

[0039] Furthermore, region 201 and line 202 are shown, similar to Figure 2 described above. In the example shown in Figure 6, the work-in-progress inventory and utilization rate of manufacturing line L1 are in the ideal range, while the work-in-progress inventory of manufacturing line L4 is in the range where improvement is needed.

[0040] Furthermore, the graph display unit 30 may also display the temporal changes in the number of work-in-progress inventory and the operating rate, similar to the embodiment 1 described above.

[0041] As described above, the manufacturing process control device 10 includes an acquisition unit 20 that acquires the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line in multiple manufacturing lines (manufacturing line L1, manufacturing line L2, manufacturing line L3, manufacturing line L4) that include the same manufacturing process, and a graph display unit 30 that displays the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line in a graph.

[0042] This allows managers to easily see the relationship between work-in-progress inventory levels and utilization rates for each production line within the same manufacturing process. This enables them to consider both factors, rather than focusing solely on one, when determining whether improvements are needed. In other words, they can assess the need for improvements based on overall trends, not just individual elements.

[0043] [Examples of implementation using software] The functions of the manufacturing process control device 10 (hereinafter referred to as "the device") are programs that cause the device to function as a computer, and these programs can be realized by programs that cause the device to function as a computer, particularly in each control block (especially the graph display unit 30).

[0044] In this case, the device includes a computer having at least one control device (e.g., a processor) and at least one storage device (e.g., memory) as hardware for executing the program. By executing the program using this control device and storage device, the functions described in each of the embodiments are realized.

[0045] The above program may be recorded on one or more computer-readable recording media, not temporary ones. These recording media may or may not be provided by the above device. In the latter case, the program may be supplied to the above device via any wired or wireless transmission medium.

[0046] Furthermore, some or all of the functions of each of the above control blocks can also be implemented by logic circuits. For example, an integrated circuit in which logic circuits functioning as each of the above control blocks are formed is also included in the scope of this disclosure. In addition, it is also possible to implement the functions of each of the above control blocks by, for example, a quantum computer.

[0047] Furthermore, each process described in the above embodiments may be performed by AI (Artificial Intelligence). In this case, the AI ​​may operate on the control device described above, or it may operate on other devices (for example, an edge computer or a cloud server).

[0048] 〔summary〕 A manufacturing process control device according to Embodiment 1 of the present disclosure includes: an acquisition unit that acquires the amount of work-in-progress inventory and the operating rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquires the amount of work-in-progress inventory and the operating rate for each manufacturing line; and a graph display unit that displays in a list graph the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or displays in a list graph the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line.

[0049] With the aforementioned configuration, the relationship between work-in-progress inventory and utilization rate for each manufacturing process, or the relationship between work-in-progress inventory and utilization rate for each production line within the same manufacturing process, can be viewed at a glance. This allows managers to consider both work-in-progress inventory and utilization rate, without being biased towards one or the other, when determining whether improvements are necessary. In other words, the need for improvements can be considered not only from the perspective of individual elements, but also from the perspective of the overall trend.

[0050] In the manufacturing process control device according to Embodiment 2 of this disclosure, in Embodiment 1, the graph display unit displays the temporal change in the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process on the graph.

[0051] According to the above configuration, it is possible to recognize the temporal changes in the relationship between work-in-progress inventory and operating rate for each manufacturing process, so that managers can recognize whether each manufacturing process is moving in the direction of improvement or the direction of deterioration.

[0052] In the manufacturing process control device according to embodiment 3 of the present disclosure, in embodiment 1 or 2, the graph display unit displays an ideal region on the graph indicating that the relationship between the work-in-progress inventory and the operating rate is ideal.

[0053] According to the above configuration, managers can easily recognize whether the relationship between work-in-progress inventory and utilization rate is ideal or not.

[0054] In any of the embodiments 1 to 3, the manufacturing process control device according to embodiment 4 of the present disclosure displays an improvement area on the graph indicating that the relationship between the work-in-progress inventory and the operating rate is subject to improvement.

[0055] With the above configuration, managers can easily recognize whether or not the relationship between work-in-progress inventory and utilization rate is a target for improvement.

[0056] In any of the embodiments 1 to 4, the manufacturing process control device according to embodiment 5 of this disclosure is configured such that each of the multiple manufacturing processes is carried out by multiple manufacturing devices, and the graph display unit displays the amount of work-in-progress inventory for each of the manufacturing devices.

[0057] According to the above configuration, the manager can recognize the amount of work-in-progress inventory for each manufacturing machine.

[0058] In any of the embodiments 1 to 5, the manufacturing process control device according to embodiment 6 of this disclosure displays the temporal change in the operating rate in the manufacturing process.

[0059] According to the above configuration, managers can recognize changes in the operating rate of the manufacturing process over time.

[0060] In any of the embodiments 1 to 6, the manufacturing process control device according to embodiment 7 of the present disclosure displays, in the order of the manufacturing processes in the plurality of manufacturing processes, the graph display unit displays the amount of work-in-progress inventory for each of the plurality of manufacturing devices and the change in the operating rate in the manufacturing process over time.

[0061] According to the above configuration, the manager can see in a list the amount of work-in-progress inventory for each manufacturing machine and the temporal changes in the operating rate in the manufacturing process, in the order of the manufacturing process.

[0062] In any of embodiments 1 to 7, the manufacturing process control device according to embodiment 8 of the present disclosure displays the temporal change in the operating rate only for the specified manufacturing process.

[0063] According to the above configuration, the operating rate is displayed only for the specified manufacturing process, so the display area of ​​the display unit can be used efficiently.

[0064] A manufacturing process management method according to aspect 9 of this disclosure includes an acquisition step of acquiring the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or acquiring the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line in multiple manufacturing lines that include the same manufacturing process, and a graph display step of displaying the relationship between the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a graph, or displaying the relationship between the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line in a graph.

[0065] Each aspect of the present disclosure may be implemented by a computer, in which case a control program for the manufacturing process control device that enables the computer to implement the manufacturing process control device by operating the computer as each part (software element) of the manufacturing process control device, and a computer-readable recording medium on which the program is recorded, also fall within the scope of the present disclosure.

[0066] The inventions described in this disclosure have been explained above based on the drawings and embodiments. However, the inventions described in this disclosure are not limited to the embodiments described above. That is, the inventions described in this disclosure can be modified in various ways within the scope shown in this disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the inventions described in this disclosure. In other words, it should be noted that it is easy for those skilled in the art to make various modifications or alterations based on this disclosure. Furthermore, it should be noted that these modifications or alterations are included in the scope of this disclosure. [Explanation of Symbols]

[0067] 10 Manufacturing process control device 20 Acquisition Department 30 Graph display section

Claims

1. An acquisition unit that acquires the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquires the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line, The system includes a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. The graph display unit is a manufacturing process control device that displays an ideal region on the graph indicating that the relationship between the work-in-progress inventory and the operating rate is ideal.

2. An acquisition unit that acquires the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquires the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line, The system includes a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. The graph display unit is a manufacturing process control device that displays an improvement area on the graph indicating that the relationship between the amount of work-in-progress inventory and the operating rate is subject to improvement.

3. An acquisition unit that acquires the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquires the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line, The system includes a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph display unit that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. Each of the aforementioned manufacturing processes is carried out by multiple manufacturing devices. The graph display unit is a manufacturing process control device that displays the amount of work-in-progress inventory for each manufacturing device.

4. The manufacturing process control device according to any one of claims 1 to 3, wherein the graph display unit displays the temporal change in the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process on the graph.

5. The manufacturing process control device according to claim 3, wherein the graph display unit displays the temporal change in the operating rate in the manufacturing process.

6. The manufacturing process management device according to claim 5, wherein the graph display unit displays the amount of work-in-progress inventory for each of the multiple manufacturing devices and the change in the operating rate in the manufacturing process in the order of the manufacturing process in the multiple manufacturing processes.

7. The manufacturing process control device according to claim 6, wherein the graph display unit displays the temporal change in the operating rate only for a specified manufacturing process.

8. An acquisition step to acquire the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or to acquire the amount of work-in-progress inventory and the utilization rate for the same manufacturing process in each manufacturing line in multiple manufacturing lines that include the same manufacturing process, The process includes a graph display step that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph showing a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. A manufacturing process control method comprising the graph display step, in which an ideal region is displayed on the graph indicating that the relationship between the work-in-progress inventory and the operating rate is ideal.

9. An acquisition step of acquiring the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquiring the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line, The process includes a graph display step that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph showing a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. A manufacturing process management method comprising the graph display step, in which an improvement area is displayed on the graph indicating that the relationship between the amount of work-in-progress inventory and the operating rate is subject to improvement.

10. An acquisition step of acquiring the amount of work-in-progress inventory and the utilization rate for each manufacturing process in a manufacturing line that includes multiple manufacturing processes, or, in multiple manufacturing lines that include the same manufacturing process, acquiring the amount of work-in-progress inventory and the utilization rate for the same manufacturing process for each manufacturing line, The process includes a graph display step that displays a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for each manufacturing process, or a graph showing a list of graphs showing the relationship between the amount of work-in-progress inventory and the operating rate for the same manufacturing process for each manufacturing line. Each of the aforementioned manufacturing processes is carried out by multiple manufacturing devices. A manufacturing process management method in which the graph display step displays the amount of work-in-progress inventory for each manufacturing apparatus.

11. A control program for causing a computer to function as a manufacturing process control device according to any one of claims 1 to 3, wherein the control program causes the computer to function as the acquisition unit and the graph display unit.

12. A computer-readable recording medium that stores the control program described in claim 11.

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