JP7530265B2 - OPERATION LOG MANAGEMENT METHOD, OPERATION LOG MANAGEMENT PROGRAM, AND OPERATION LOG MANAGEMENT DEVICE - Google Patents

Description

The technology disclosed in this specification relates to an operation log management method, an operation log management program, and an operation log management device.

Conventionally, known board working devices for working on boards include screen printing devices that print circuit patterns on boards, print inspection machines that inspect screen-printed circuits, dispensers that apply adhesive to boards, surface mounting machines that mount components on boards, post-mounting appearance inspection machines that inspect the appearance of the board after the components have been mounted, reflow devices that melt solder paste at high temperatures, and post-cure appearance inspection devices that inspect the appearance of the board after the melted solder paste has hardened.
Generally, a board working device is provided with an operation unit for changing various set values, and an operator can change the set values by operating the operation unit (see, for example, Japanese Patent Application Laid-Open No. 2003-233634).

JP 2019-197823 A

If an operator performs an inappropriate change operation on the above-mentioned operation unit, the quality of the work may be reduced due to the change operation. A reduction in the quality of the work means, for example, that some kind of trouble occurs due to the change operation, that the success rate of the work decreases, etc.
However, in the past, there has been no sufficient consideration given to preventing a decrease in the quality of work caused by change operations performed by an operator.

This specification discloses a technology that prevents the quality of work from deteriorating due to changes made by an operator.

(1) According to one aspect of the present invention, an operation log management method for managing an operation log of a change operation that changes the operation of a board working device that works on a board includes an acquisition step of acquiring the operation log, a storage step of storing the operation log acquired in the acquisition step in a storage unit, an addition step of adding quality information indicating whether or not the quality of the work has deteriorated due to the change operation indicated by the operation log to the operation log stored in the storage unit, and a determination step of determining whether or not the change operation indicated by the operation log newly acquired in the acquisition step is a change operation that may deteriorate the quality of the work, based on other operation logs stored in the storage unit.

The above "change" refers to changing an already set value to a different value. Note that "change" can mean both setting a value for the first time when nothing has been set, and changing an already set value to a different value.

According to the above operation log management method, whether or not the change operation indicated by the newly acquired operation log is a change operation that may cause a decrease in the quality of the work is determined based on other operation logs. Therefore, if it is determined that the change operation may cause a decrease in the quality of the work, the operator can redo the change operation so as to reduce the possibility of the decrease in the quality of the work, thereby preventing the decrease in the quality of the work.
Therefore, according to the above-described operation log management method, it is possible to prevent the quality of work from being reduced due to change operations performed by an operator.

(2) According to one aspect of the present invention, the method may include a first notification step of notifying an operator performing the change operation that the change operation may degrade the quality of the work if the determination step determines that the change operation may degrade the quality of the work.

According to the above operation log management method, if it is determined that a change operation has the potential to reduce the quality of work, the operator performing the change operation is notified that this change operation has the potential to reduce the quality of work. This allows the notified operator to redo the change operation in a way that reduces the possibility of the quality of work decreasing, thereby preventing the quality of work from decreasing.

(3) According to one aspect of the present invention, in the determination step, if the change operation indicated by the newly acquired operation log is similar to the change operation indicated by another operation log to which the quality information indicating that the quality of the work has been deteriorated is added, it may be determined that the change operation is likely to deteriorate the quality of the work.

If a change operation similar to a change operation indicated by an operation log to which quality information indicating a decline in the quality of work is added is performed, there is a high possibility that the change operation will result in a decline in the quality of the work.
According to the above-described operation log management method, it is possible to determine whether a change operation has the potential to reduce the quality of work by determining whether the change operation is similar to a change operation indicated by an operation log to which quality information indicating that the quality of work has been reduced is added.

(4) According to one aspect of the present invention, in the determination step, if the change operation indicated by the newly acquired operation log is the same as the change operation indicated by another operation log to which the quality information indicating that the quality of the work has deteriorated is added, or if the absolute value of the difference between the setting value after the change of the change operation indicated by the newly acquired operation log and the setting value after the change of the change operation indicated by the other operation log is equal to or smaller than a predetermined value, it may be determined that the change operation is similar to the change operation indicated by the other operation log.

If the absolute value of the difference between the same change operation indicated by an operation log to which quality information indicating that the quality of work has deteriorated and the changed setting value of the change operation indicated by the operation log is equal to or less than a predetermined value, there is a high possibility that the quality of the work will deteriorate.
According to the above-described operation log management method, it is possible to determine whether the change operation indicated by the newly acquired operation log is the same as the change operation indicated by another operation log to which quality information indicating that the quality of the work has deteriorated is added, or whether the absolute value of the difference between the change operation indicated by the other operation log and the post-change setting value is equal to or less than a predetermined value, thereby determining whether the change operation indicated by the newly acquired operation log is similar to the change operation indicated by the other operation log.

(5) According to one aspect of the present invention, the quality information is information indicating whether or not a problem has occurred in the work due to the change operation, and the quality information indicating that the quality of the work has deteriorated may be the quality information indicating that the problem has occurred.

The above operation log management method can prevent problems caused by change operations.

(6) According to one aspect of the present invention, in the determination step, if the change operation indicated by the newly acquired operation log contradicts the change operation indicated by another operation log to which the quality information indicating that the quality of the work has been improved is added, it may be determined that the change operation is one that may cause a decrease in the quality of the work.

If a change operation is performed that contradicts a change operation indicated by an operation log that has quality information attached to it that indicates that the quality of the work has improved, there is a high possibility that the change operation will result in a decrease in the quality of the work.
According to the above-described operation log management method, it is possible to determine whether a change operation has the potential to deteriorate the quality of work by determining whether the change operation is contradictory to a change operation indicated by an operation log to which quality information indicating that the quality of work has been improved is added.

(7) According to one aspect of the present invention, the quality information is information indicating a pre-change success rate indicating the success rate of the task before the operation is changed and a post-change success rate indicating the success rate of the task after the operation is changed, and the quality information indicating that the quality of the task has improved may be quality information in which the post-change success rate is higher than the pre-change success rate.

The above operation log management method makes it possible to determine whether the quality information indicates that the quality of work has improved.

(8) According to one aspect of the present invention, the conflicting change operation may be at least one of the change operation that changes the setting value to a smaller value than the setting value before the change of the other change operation, which improves the quality of the work by increasing the setting value compared to before the change, and the change operation that changes the setting value to a larger value than the setting value before the change of the other change operation, which improves the quality of the work by decreasing the setting value compared to before the change.

If the quality of work improves by increasing the setting value from before the change, then decreasing the setting value from before the change can be said to be a change operation that contradicts the change operation that improved the quality of work. Conversely, if the quality of work improves by decreasing the setting value from before the change, then increasing the setting value from before the change can be said to be a change operation that contradicts the change operation that improved the quality of work.

(9) According to one aspect of the present invention, the change operation may be an operation for switching between enabling and disabling a function provided in the board working device, and the conflicting change operation may be a change operation for disabling the function when enabling the function through the other change operation improves the quality of the work.

If the quality of work is improved by enabling a function provided by the circuit board work device, disabling that function can be said to be a change operation that contradicts the change operation that improved the quality of work.

(10) According to one aspect of the present invention, when the change operation indicated by the newly acquired operation log is similar to the change operation indicated by another operation log to which the quality information indicating that the quality of the work has been improved is added, if the post-change success rate of the other operation log is less than a reference value, a second notification step may be included to notify the operator performing the change operation that the success rate of the work may not meet the reference value.

A change operation similar to a change operation with an improved success rate may also improve the success rate of the operation. However, even if the success rate of the operation improves, if the success rate after the change does not meet the reference value, sufficient improvement in quality cannot be expected.
According to the above-described operation log management method, when the post-change success rate of a change operation indicated by other similar operation logs does not meet a reference value, the operator is notified that the change operation performed by the operator may result in the success rate of the work not meeting the reference value. Therefore, by having the operator redo the change operation, the success rate of the work is more likely to reach the reference value.

(11) According to one aspect of the present invention, the method may include a playback step of playing back the change operations after the fact by displaying the change operations indicated by the multiple operation logs stored in the storage unit in chronological order on a display unit.

Conventionally, operation logs of change operations are stored, and when a problem occurs due to a change operation, the operation logs are analyzed to identify the cause. However, conventionally, the stored operation logs were analyzed as is, so it took time to identify the cause. In addition, in order to analyze the operation logs, it is necessary to understand the data format of the operation logs, and if the data format is not understood, it takes even more time.
According to the above-described operation log management method, the change operation indicated by the operation log is reproduced by displaying it on the display unit, so that it is easier to identify the change operation that caused the trouble compared to analyzing the operation log directly.

(12) According to one aspect of the present invention, the method may include a reproducing step of reproducing the change operation in real time by displaying the change operation indicated by the acquired operation log on a display unit each time the operation log is acquired in the acquisition step.

According to the above playback method, the change operations are played back in real time, so that a supervisor who monitors the change operations performed by the operator can monitor the played back change operations in real time, and if he or she determines that the change operations will reduce the quality of the work, he or she can inform the operator of this, thereby reducing the possibility of the quality of the work being reduced.

The invention disclosed in this specification can be realized in various forms, such as an apparatus, a method, a computer program for implementing the functions of these apparatus or methods, and a recording medium on which the computer program is recorded.

This helps prevent the quality of work from deteriorating due to changes made by the operator.

Schematic diagram of a substrate production facility according to the first embodiment. Top view of surface mount machine A side view of the head unit and the head moving part Block diagram showing the electrical configuration of a surface mounter A block diagram showing the electrical configuration of an operation log management device. Schematic diagram showing screen transitions of the operation screen Schematic diagram of transition table Schematic diagram of the operation table on the part information setting screen Schematic diagram of the operation table on the feeder deceleration setting screen Schematic diagram of the operation table on the equipment setting screen Schematic diagram of parts FIG. 13 is a schematic diagram of an operation system table on a part information setting screen according to a second embodiment; Schematic diagram of the operation table on the equipment setting screen Screen operation playback screen diagram

<Embodiment 1>
A first embodiment will be described with reference to Figures 1 to 11. In the following description, the left-right direction in Figure 2 is referred to as the X-axis direction, the front-rear direction is referred to as the Y-axis direction, and the up-down direction in Figure 3 is referred to as the Z-axis direction. In addition, in the following description, the right side in Figure 1 is referred to as the upstream side, and the left side is referred to as the downstream side. In addition, in the following description, the reference numerals in the drawings may be omitted for the same components, with some exceptions.

(1) Board Production Equipment With reference to Fig. 1, a board production equipment 1 that mounts components on a board will be described. The board production equipment 1 includes a production line 2 that mounts components on a board, an operation log management device 3, and one or more change support devices 4 (two in the example shown in Fig. 1), which are communicatively connected via a communication network 5 such as a LAN (Local Area Network). Although there is only one production line 2 in the example shown in Fig. 1, the board production equipment 1 may include multiple production lines 2. One production line 2 may include only one board transport lane for transporting boards, or may include multiple lanes.

The production line 2 is equipped with multiple pieces of equipment, such as a loader 10, a screen printer 11, a print inspection machine 12, a dispenser 13, multiple surface mounters 14, a post-mounting appearance inspection machine 15, a reflow device 16, a post-cure appearance inspection device 17, and an unloader 18, which are connected in series via multiple conveyors 19. Each of these pieces of equipment is an example of a board working device. Each piece of equipment is equipped with an operation unit for changing the operation of that equipment. An operator can change the operation of the equipment by operating the screen displayed on the operation unit.

The change support device 4 is a device for remotely changing the operation of each piece of equipment that makes up the production line 2. As described above, the operator can change the operation of the equipment using the operation unit that each piece of equipment is equipped with, but the operation of the equipment can also be changed remotely by operating the screen displayed on the display unit 53 (see Figure 5) of the change support device 4.

The operation log management device 3 is a device that manages operation logs of screen operations performed on the operation unit of each piece of equipment and on the change support device 4. A screen operation is an example of a change operation. As will be described in more detail later, the operation log management device 3 has a function to store operation logs of screen operations performed on the operation unit of each piece of equipment and on the change support device 4, and a function to notify the operator when a screen operation that may reduce the quality of the work of mounting components on a board is performed.

As mentioned above, the equipment that makes up the production line 2 includes various types of equipment such as the loader 10, screen printer 11, print inspection machine 12, dispenser 13, and surface mount machine 14, but in the following explanation, the surface mount machine 14 will be used as an example of equipment.

(2) Configuration of the Surface Mounting Machine The configuration of the surface mounting machine 14 will be described with reference to Fig. 2. The surface mounting machine 14 is a device that mounts (an example of an operation) components E, such as electronic components, on a substrate P on which a circuit has been printed by the screen printing machine 11. The surface mounting machine 14 includes a base 20, a transport conveyor 21, a backup device (not shown), four tape component supply devices 22, a head unit 24, a head moving unit 25, and the like. The surface mounting machine 14 also includes a control unit 30 (see Fig. 4) and an operation unit 31 (see Fig. 4), which will be described later, and the like.

The base 20 is rectangular in plan view. In FIG. 2, a rectangular frame A indicated by a two-dot chain line indicates the work position (hereinafter referred to as work position A) when mounting a component E on a substrate P.

The transport conveyor 21 transports the board P from the upstream side in the X-axis direction to the working position A, and transports the board P on which the components E are mounted at the working position A to the downstream side. The transport conveyor 21 is equipped with a pair of conveyor belts 21A and 21B that are driven in a circular motion in the X-axis direction, and a conveyor drive motor 44 (see Figure 4) that drives these conveyor belts. The rear conveyor belt 21A is movable in the Y-axis direction, and the distance between the two conveyor belts 21A and 21B can be adjusted according to the width of the board P.

A backup device (not shown) is disposed below working position A. The backup device is equipped with a plurality of backup pins. When substrate P is transported to working position A, the backup device rises and substrate P is supported from below by the plurality of backup pins.
The tape component supply devices 22 are arranged in a row in the X-axis direction on both sides of the transport conveyor 21 in the Y-axis direction, for a total of four tape component supply devices 22. A plurality of feeders 23 are set in each of the tape component supply devices 22, aligned horizontally in the X-axis direction. In the following explanation, the position where each feeder 23 is set is referred to as the set position of that feeder 23.

Each feeder 23 is a so-called tape feeder and is equipped with a reel on which a component tape containing a plurality of components E is wound, and an electric tape feeding device that draws out the component tape from the reel, and supplies components E one by one from a component supply position provided at the end on the transport conveyor 21 side.
Here, the component supply device will be described using a tape component supply device 22 as an example, but the component supply device may be a so-called tray feeder that supplies trays on which components E are placed, or may be one that supplies semiconductor wafers.

The head unit 24 includes a plurality of mounting heads 28 arranged in a row. The configuration of the head unit 24 will be described later.
The head moving section 25 moves the head unit 24 in the X-axis direction and the Y-axis direction within a predetermined movable range. The head moving section 25 includes a beam 26 supporting the head unit 24 so as to be reciprocatable in the X-axis direction, a pair of Y-axis guide rails 27 supporting the beam 26 so as to be reciprocatable in the Y-axis direction, an X-axis servo motor 40 which moves the head unit 24 back and forth in the X-axis direction, and a Y-axis servo motor 41 which moves the beam 26 back and forth in the Y-axis direction.

The head unit 24 will be described with reference to Figure 3. The head unit 24 has multiple mounting heads 28 arranged in a row, a Z-axis servo motor 42 (see Figure 4) that raises and lowers each mounting head 28 individually, and an R-axis servo motor 43 (see Figure 4) that rotates the multiple mounting heads 28 simultaneously around their axis.

The mounting head 28 is for suctioning and releasing the component E, and has a nozzle shaft 28A and a suction nozzle 28B that is detachably attached to the lower end of the nozzle shaft 28A. Negative pressure and positive pressure are supplied to the suction nozzle 28B from an air supply device (not shown) via the nozzle shaft 28A. The suction nozzle 28B sucks up the component E when negative pressure is supplied thereto, and releases the component E when positive pressure is supplied thereto.
Here, an inline type head unit 24 in which multiple mounting heads 28 are arranged in a row will be described as an example, but the head unit 24 may also be, for example, a so-called rotary head in which multiple mounting heads 28 are arranged on a circumference.

The electrical configuration of the surface mounter 14 will be described with reference to FIG. 4. The surface mounter 14 includes a control unit 30 and an operation unit 31. The control unit 30 includes an arithmetic processing unit 32, a motor control unit 33, a memory unit 34, an external input/output unit 35, a feeder communication unit 36, a communication unit 37, and the like.

The arithmetic processing unit 32 includes a CPU, a RAM, and the like, and controls each part of the surface mounter 14 by executing a control program stored in the storage unit 34 .
Under the control of the calculation processing unit 32, the motor control unit 33 controls the operation, stopping and rotation speed of each motor, such as the X-axis servo motor 40, the Y-axis servo motor 41, the Z-axis servo motor 42, the R-axis servo motor 43 and the conveyor drive motor 44.

The memory unit 34 is a storage device having a rewritable storage medium (such as a hard disk) on which data is not erased even when the power is turned off, and stores various programs and data. The various data include the types of boards P planned for production (board names), the order in which each type of board P will be produced, the number of boards to be produced, board data for each board P, the types (component names) of components E to be mounted on each board P, the order in which each component E will be mounted, the mounting position and mounting angle of each component E, component data for each component E, etc.

The external input/output unit 35 is a so-called interface, and is configured to receive detection signals output from various sensors 45 provided in the main body of the surface mounter 14. The external input/output unit 35 is also configured to control the operation of various actuators 46 based on control signals output from the arithmetic processing unit 32.
The feeder communication unit 36 is connected to the feeder 23 and controls the feeder 23 in an integrated manner.

The communication unit 37 is a circuit for communicating with other devices connected to the communication network 5 .
The operation unit 31 includes a display device 31A such as a liquid crystal display, and an input device 31B such as a touch panel. An operator can operate the operation unit 31 to change the operation of the surface mounter 14, give instructions for the operation, and the like.

(3) Electrical Configurations of Operation Log Management Device and Change Support Device Since the electrical configuration of the operation log management device 3 and the electrical configuration of the change support device 4 are substantially the same, the operation log management device 3 will be described as an example here.
5, the electrical configuration of the operation log management device 3 will be described. The operation log management device 3 is a so-called personal computer, and includes a CPU 50 (an example of a control unit), a RAM 51, a storage unit 52, a display unit 53, an operation unit 54, a communication unit 55, and the like.

The storage unit 52 is a storage device having a rewritable storage medium (such as a hard disk) from which data is not erased even when the power is turned off, and stores various programs and data. In the case of the operation log management device 3, the various programs include an operation log management program for managing operation logs. Also, in the case of the operation log management device 3, the various data include a transition system table, an operation system table, a part information table, etc., which will be described later. In the case of the change support device 4, the various programs include an operation change program, which will be described later.
The display unit 53 is, for example, a liquid crystal display. The operation unit 54 is composed of a keyboard, a touch panel, a mouse, etc. The communication unit 55 is a circuit for the CPU 50 to communicate with other devices via the communication network 5.

(4) Operation Screen The operation screen for changing the operation of each piece of equipment will be described with reference to Fig. 6. As described above, the operation of each piece of equipment can be changed by an operation unit provided in each piece of equipment, or by the change support device 4. Some screen transitions on the operation screen differ when making changes by an operation unit provided in each piece of equipment and when making changes by the change support device 4. Here, the case of making changes by the change support device 4 will be described as an example.

When the operator starts the operation change program in the change support device 4, an equipment selection screen 60 is displayed. The equipment selection screen 60 is a screen that accepts the selection of the production line 2 and the selection of the equipment to be the target of the operation change from among the equipment constituting the selected production line 2. In the following explanation, it is assumed that the surface mounter 14 is selected as the equipment.
When the change is made on the operation unit of each piece of equipment, the equipment selection screen 60 is not displayed, and the menu screen 61 is displayed. When the change is made on the operation unit of each piece of equipment, the equipment and the production line 2 to which the equipment belongs are automatically selected.

When the operator selects equipment on the equipment selection screen 60, a menu screen 61 is displayed. If a surface mounter 14 is selected as the equipment, menu items such as component information settings, feeder deceleration settings, and equipment settings are displayed on the menu screen 61. Note that the menu items displayed on the menu screen 61 vary depending on the type of equipment selected.

When the operator selects part information setting on the menu screen 61, a part selection screen 62 is displayed for accepting the selection of the type of part E. When the operator selects the type of part E on the part selection screen 62, a part information setting screen 63 is displayed. The part information setting screen 63 is a screen for changing various information related to the selected part E.
Specifically, in the example shown in FIG. 6, the nozzle descent deceleration rate, nozzle ascent deceleration rate, nozzle descent amount, etc. are changed. The nozzle descent deceleration rate is a setting item that sets how much the descent speed is slowed down from the standard descent speed when the suction nozzle 28B is lowered to pick up the selected component E. The nozzle ascent deceleration rate is a setting item that sets how much the ascent speed is slowed down from the standard ascent speed when the suction nozzle 28B is raised after picking up the component E. The nozzle descent amount is a setting item that sets the amount by which the suction nozzle 28B is lowered when picking up the component E. For example, if the nozzle descent amount is small, a gap may be generated between the tip of the suction nozzle 28B and the component E, which may result in failure to pick up the component. Conversely, if the nozzle descent amount is large, the suction nozzle 28B will push the component E in, which is likely to lead to component damage.

When the operator selects the feeder deceleration setting on the menu screen 61, a feeder deceleration setting screen 64 is displayed. The feeder deceleration setting screen 64 is a screen for changing the deceleration rate, which indicates the percentage by which the feed speed when feeding out the component tape by the feeder 23 is slowed down from the standard feed speed, for each set position where the feeder 23 is set.

When the operator selects equipment settings on the menu screen 61, an equipment settings screen 65 is displayed. The surface mounter 14 has a function (mis-mounting prevention function) that prevents a wrong component E from being mounted on the board P when a wrong component tape is set in the tape component supply device 22. On the equipment settings screen 65 of the surface mounter 14, the mis-mounting prevention function can be enabled/disabled.
Although omitted in FIG. 6, various buttons such as an end button are also displayed on each operation screen.

(5) Operation Log The operation log will be described with reference to Fig. 7 to Fig. 10. Each time an operation screen such as the component information setting screen 63, the feeder deceleration setting screen 64, or the equipment setting screen 65 is operated, the surface mounter 14 or the change support device 4 transmits an operation log of the operation to the operation log management device 3. The operation log management device 3 acquires the operation log by receiving the operation log transmitted from the surface mounter 14 or the change support device 4 (an example of an acquisition process).

The operation logs include a transition system log, which is a log of screen transitions, and an operation system log, which is a log of operations performed on each screen. The memory unit 52 of the operation log management device 3 stores a transition system table (see FIG. 7), which is a data table in which the transition system logs are registered, and an operation system table (see FIG. 8), which is a data table in which the operation system logs are registered. Registering the operation logs in these tables is an example of a storage process for storing the operation logs in the memory unit 52.

The transition system table will be described with reference to FIG. 7. The transition system table has the following data items: operation ID, screen ID, time (start time, end time), production line number, and equipment number.

An operation ID is assigned each time an operation screen is displayed. For example, when the part information setting screen 63 is displayed, a unique operation ID is assigned to the display of the part information setting screen 63. If the operator makes changes on the part information setting screen 63, closes the part information setting screen 63, and then displays the part information setting screen 63 again, a different operation ID is assigned to the newly displayed part information setting screen 63.

The screen ID is a data item in which the screen ID given to the displayed operation screen is registered. The screen ID is a character code consisting of numbers and alphabets, but for ease of understanding, in Fig. 7, the screen name is shown as the screen ID as it is.
The time is a data item in which the time when the operation screen is displayed (start time) and the time when the operation screen is closed (end time) are registered.

The production line number is a data item in which the number assigned to the production line 2 selected on the equipment selection screen 60 (or the number of the production line 2 to which the equipment belongs if the change is made using the operation unit equipped on the equipment) is registered.
The equipment number is a data item in which the equipment number of the equipment selected on the equipment selection screen 60 (or the equipment number of the equipment if changes have been made using the operation unit of the equipment) is registered.

The operation system table will be described with reference to Figures 8 to 10. An operation system table is provided for each operation screen. The operation system table shown in Figure 8 is the operation system table for the part information setting screen 63. The operation system table for the part information setting screen 63 has the following data items: operation ID, part ID, setting item ID, setting value (before change), setting value (after change), and trouble flag (an example of quality information).

In the part ID field, the part ID of the part E selected on the part selection screen 62 described above is registered.
The operation ID is the same as the operation ID described above. For example, when the part information setting screen 63 is displayed and a setting value is changed, the operation ID registered is the same as the operation ID assigned to the part information setting screen 63 displayed at that time. This associates the operation screen with the operation.

The setting item ID is an ID given to the setting item whose setting value has been changed. For ease of understanding, the setting item name is shown as the setting item ID in FIG.
The setting value (before change) is a data item in which, when a setting value is changed on the part information setting screen 63, the setting value before the change is registered.
The setting value (after change) is a data item in which the setting value after change is registered.

The trouble flag is a data item that indicates whether or not a screen operation caused a trouble. For example, suppose that a trouble occurs during production when a board P is produced by changing the setting value of a certain setting item A from B to C. Then, the operator investigates the cause of the trouble and finds that it was caused by changing the setting value of the above-mentioned setting item A from B to C. In this case, the operator sets a value indicating that it was a screen operation that caused the trouble in the trouble flag in the operation log of the operation that changed the setting value of setting item A from B to C (an example of an additional process). The value of the trouble flag is 0 or 1. 1 indicates that it was a screen operation that caused the trouble, and 0 indicates that it was not a screen operation that caused the trouble. 1 is an example of quality information indicating that a trouble occurred. The default value of the trouble flag is 0.

The operation system table shown in FIG. 9 is the operation system table of the feeder deceleration setting screen 64. The operation system table of the feeder deceleration setting screen 64 has the following data items: operation ID, set position number, setting value (before change), setting value (after change), and trouble flag.

The operation system table shown in FIG. 10 is the operation system table of the equipment setting screen 65. The operation system table of the equipment setting screen 65 has the following data items: operation ID, function ID, setting value (before change), setting value (after change), and trouble flag. The function ID is a number assigned to the function of each piece of equipment. For ease of understanding, the function name is shown as the function ID in FIG. 10.

(7) Operation Log Management Method When the operation log management device 3 acquires an operation log from a device (the change support device 4 or the operation unit of each piece of equipment) on which an operator is performing screen operations, it registers the acquired operation log in the transition system table and the operation system table, and determines whether or not the screen operation indicated by the operation log is a screen operation that may be the cause of a problem, based on other operation logs registered in the transition system table and the operation system table (an example of a determination process).

Specifically, the operation log management device 3 determines whether the screen operation indicated by the acquired operation log is similar to the screen operation indicated by another operation log in which the trouble flag is set to 1 (in other words, the screen operation that caused the trouble), and if similar, determines that it is a screen operation that may have caused the trouble.
The above-mentioned similarity in screen operations can be classified into two cases: when the absolute value of the difference between the setting values is equal to or less than a predetermined value, and when the screen operations are the same. Each of these cases will be described below.

(7-1) Cases where the absolute value of the difference in the set values is equal to or less than a predetermined value For example, in the example shown in Fig. 8, a trouble occurs when an operator changes the nozzle descent amount of part Ea from 3.31 mm to 3.34 mm, and the trouble flag in the operation log when the nozzle descent amount is changed to 3.34 mm is set to 1. In this case, suppose that the operator changes the set value of the nozzle descent amount for another type of part Eb, which has a similar shape to part Ea, to 3.33 mm, which is a value close to 3.34 mm. In this case, the changed set value of 3.33 mm is close to the set value of 3.34 mm that caused the trouble for part Ea, which has a similar shape to part Eb, and therefore may cause the trouble.

For this reason, if the absolute value of the difference between the setting value after the change of an operation log in which the trouble flag is set to 1 among the operation logs of part E with a similar shape is equal to or less than a predetermined value, the operation log management device 3 determines that the screen operation is similar to the screen operation that caused the trouble.

First, the similarity of part E will be described. A part information table (not shown) that represents the shape of each type of part E is stored in the memory unit 52 of the operation log management device 3. For ease of understanding, the shape of part E is assumed to be a rectangular parallelepiped. As shown in FIG. 11, the width of part E in the left-right direction is defined as dimension X, the width in the front-back direction as dimension Y, and the width in the up-down direction as thickness Z. In the part information table (not shown), the dimensions X, Y, and Z of each type of part E are registered as data representing the shape of part E.

As shown in the following Table 1, tolerances that serve as standards for similarity are set in the operation log management device 3. In the example shown in Table 1, the tolerance for dimension X is changed to ±30%, the tolerance for dimension Y to ±20%, and the tolerance for thickness to ±10%. The operation log management device 3 determines that a part Eb is similar to a part Ea if the differences between the dimensions X, Y, and Z of a part Eb and the dimensions X, Y, and Z of another part Ea are all within the tolerances.

When a screen operation is performed to change the setting value of a certain setting item (here, referred to as setting item D) of a certain part Eb and the operation log of that screen operation (an example of a newly acquired operation log) is acquired, the operation log management device 3 searches the part information table for a part E that has a similar shape to part Eb. Then, for example, if part Ea is searched for as part E that has a similar shape to part Eb, the operation log management device 3 determines whether or not there is an operation log in which the trouble flag is set to 1 among the operation logs in which the setting value of setting item D of part Ea was changed in the past.

When there is an operation log in which the trouble flag is set to 1, the operation log management device 3 determines whether the absolute value of the difference between the post-change setting value of part Eb and the post-change setting value of the operation log in which the trouble flag is set to 1 is equal to or less than a predetermined value. The predetermined value may be a fixed value, or may be a value equivalent to a predetermined percentage of the post-change setting value of a similar part Ea. When the absolute value of the difference is equal to or less than the predetermined value, the operation log management device 3 determines that the screen operation is similar to the screen operation that caused the trouble.

When the operation log management device 3 determines that the screen operation is similar to the screen operation that caused the trouble, it transmits a message to the device (the change support device 4 or the operation unit of each piece of equipment) on which the operator is performing the screen operation, indicating that the screen operation may cause the trouble (in other words, the screen operation may deteriorate the quality of the work). When the device receives the message, it displays the received message on the screen. This notifies the operator. The operator may be notified by voice.
Here, the part information setting screen 63 has been described as an example, but the same applies to the feeder deceleration setting screen 64.

(7-2) Cases in which the screen operations are the same For example, assume that an operator selects the surface mounter 14 on the equipment selection screen 60, and changes the erroneous mounting prevention function from enabled to disabled on the equipment setting screen 65. In this case, the operation log management device 3 extracts operation logs in which an operation to change the erroneous mounting prevention function from enabled to disabled was performed (in other words, operation logs in which the same screen operation was performed) from among the operation logs of equipment similar to the selected equipment. Here, equipment similar to the selected equipment includes, for example, when the selected equipment is the surface mounter 14, the similar equipment includes not only the selected surface mounter 14 itself but also all other surface mounters 14. The same applies to other equipment.

The operation log management device 3 determines whether or not there is an operation log with a trouble flag of 1 among the extracted operation logs (operation logs in which an operation was performed to change the erroneous installation prevention function from enabled to disabled in similar equipment), and if there is an operation log with a trouble flag of 1, it determines that the screen operation is the same as the screen operation that caused the trouble. If the operation log management device 3 determines that the screen operation is the same as the screen operation that caused the trouble, it sends a message to the device on which the operator is performing the screen operation, indicating that it is a screen operation that may cause a trouble.

(8) Effects of the embodiment According to the operation log management method of the first embodiment, whether or not a screen operation indicated by a newly acquired operation log is a screen operation that may cause a problem (in other words, a screen operation that may cause a decrease in the quality of work) is determined based on other operation logs. Therefore, if it is determined that a screen operation that may cause a problem is a screen operation, the operator can redo the screen operation so as to reduce the possibility of the problem occurring, thereby preventing the problem from occurring. Therefore, the problem caused by the screen operation performed by the operator can be prevented from occurring.

According to the above operation log management method, if it is determined that a screen operation may cause a problem, the operator performing the screen operation is notified that the screen operation may cause a problem. The notified operator can then redo the screen operation in a way that reduces the possibility of the problem occurring, thereby preventing the problem from occurring.

According to the above operation log management method, by determining whether a screen operation is similar to a screen operation indicated by an operation log in which the trouble flag is set to 1 (i.e., an operation log to which quality information indicating that the quality of the work has deteriorated is added), it is possible to determine whether a screen operation may cause a trouble.

According to the above operation log management method, by determining whether the absolute value of the difference between the changed setting value of the screen operation indicated by the newly acquired operation log and the changed setting value of the screen operation indicated by another operation log in which the trouble flag is set to 1 is equal to or less than a predetermined value, it is possible to determine whether the screen operation is similar to the screen operation indicated by the other operation log.

According to the above operation log management method, by determining whether the setting values after the change of the screen operation indicated by the newly acquired operation log are the same as the setting values after the change of the screen operation indicated by another operation log in which the trouble flag is set to 1, it is possible to determine whether the screen operation is similar to the screen operation indicated by the other operation log.

According to the above operation log management method, the quality information is information indicating whether or not a problem has occurred in the work due to screen operations, and quality information indicating that the quality of the work has deteriorated is quality information indicating that a problem has occurred, so that the occurrence of problems due to screen operations can be suppressed.

<Embodiment 2>
When a screen operation that is contradictory to a screen operation that has improved the quality of the work of mounting components E on a board P is performed, the operation log management device 3 according to the second embodiment notifies the operator that the screen operation may deteriorate the quality of the work (an example of a first notification process). In the following explanation, the pickup rate (the ratio of the number of successful pickups to the number of pickup attempts) and the normal mounting rate (the ratio of the number of times that components E were successfully mounted to the number of mounting attempts) when the suction head picks up components E are explained as examples of the work quality. The pickup rate and normal mounting rate are examples of the success rate of the work.

12 is an operation system table of the part information setting screen 63. The operation system table of the part information setting screen 63 according to the second embodiment has pick-up rates (pre-change pick-up rate, post-change pick-up rate) instead of the trouble flags of the operation system table according to the first embodiment.
In the case of part Ea shown in Fig. 12, when the nozzle descent amount is changed from 3.31 mm to 3.34 mm, the pickup rate is improved from 99.93% to 99.96%. In this case, since the pickup rate is improved by increasing the nozzle descent amount to more than 3.31 mm, there is a high possibility that the pickup rate will decrease if the nozzle descent amount is decreased to less than 3.31 mm. For this reason, if a screen operation is performed for part E, which has a shape similar to part Ea, to reduce the set value to less than 3.31 mm (the set value before the change of other screen operations in which the quality of work was improved by increasing the set value compared to before the change), the screen operation can be said to be a screen operation that is contradictory to the other screen operations in which the pickup rate was improved. The screen operation to reduce the set value to less than 3.31 mm can also be said to be a screen operation in the direction of decreasing the quality of work.

In the case of part Ec shown in FIG. 12, changing the nozzle descent amount from 3.33 mm to 3.29 mm improves the pickup rate from 99.90% to 99.91%. In this case, since the pickup rate improves by making the nozzle descent amount smaller than 3.33 mm, there is a high possibility that the pickup rate will decrease if the nozzle descent amount is made larger than 3.33 mm. For this reason, if a screen operation is performed to make the setting value larger than 3.33 mm for part E, which has a shape similar to part Ec, the setting value is changed to a value larger than the setting value before the change of other screen operations that improved the pickup rate by making the setting value smaller than before the change, so that screen operation can be said to be a screen operation that is contradictory to the other screen operations that improved the pickup rate. A screen operation that makes the setting value larger than 3.33 mm can also be said to be a screen operation that reduces the quality of work.

The operation system table shown in FIG. 13 is the operation system table for the equipment setting screen 65. The operation system table for the equipment setting screen 65 according to the second embodiment also has work quality (normal installation rate before change, normal installation rate after change) instead of trouble flags. In the case of the screen operation of ID006 shown in FIG. 13, when the erroneous installation prevention function is changed from disabled to enabled, the normal installation rate improves from 99.94% to 99.97%. For this reason, if a screen operation is performed to change the erroneous installation prevention function from enabled to disabled, this screen operation can be said to be a screen operation that contradicts the other screen operations that improved the normal installation rate. A change from enabled to disabled can also be said to be a screen operation that reduces the quality of work.

When a screen operation that may cause a decrease in the quality of work is performed, the operation log management device 3 according to the second embodiment sends a message to the device (the change support device 4 or the operation unit of each piece of equipment) on which the operator is performing the screen operation, indicating that the screen operation may cause a decrease in the quality of work.

Here, in the case of part Ec shown in FIG. 12, when the nozzle descent amount is changed from 3.33 mm to 3.29 mm, the pickup rate improves from 99.90% to 99.91%. However, if the standard value of the pickup rate is 99.95%, for example, the pickup rate after the change is less than the standard value. In this case, assume that the operator changes the nozzle descent amount to 3.30 mm, which is a setting value smaller than 3.33 mm, for part E, which has a shape similar to part Ec. Although this screen operation is not a screen operation in a direction that reduces the quality of the work, since the value is close to 3.29 mm, there is a possibility that the pickup rate will not meet the standard value. For this reason, the operation log management method notifies the operator that the success rate (pickup rate) of the work may not meet the standard value if the absolute value of the difference between the changed setting value and 3.29 mm is less than a predetermined value, even if the screen operation is not a direction that reduces the quality of the work (an example of a second notification process).

According to the operation log management method of the second embodiment, by determining whether a screen operation is contradictory to a screen operation indicated by an operation log to which quality information indicating that the quality of work (pickup rate, normal installation rate) has been improved (an operation log in which the pick-up rate after the change is higher than the pick-up rate before the change, or an operation log in which the normal installation rate after the change is higher than the normal installation rate before the change) is added, it is possible to determine whether a screen operation may cause a decrease in the quality of work.

According to the above operation log management method, the quality information is information indicating a pre-change success rate (pre-change pickup rate, pre-change normal installation rate) indicating the success rate of the work before the operation is changed, and a post-change success rate (post-change pickup rate, post-change normal installation rate) indicating the success rate of the work after the operation is changed, and since quality information indicating that the quality of the work has improved is quality information in which the post-change success rate is higher than the pre-change success rate, it is possible to determine whether the quality information indicates that the quality of the work has improved.

According to the above operation log management method, the conflicting screen operation is at least one of a screen operation that changes the setting value of another screen operation, which has improved the quality of work by increasing the setting value compared to before the change, to a value smaller than the setting value before the change, and a screen operation that changes the setting value of another screen operation, which has improved the quality of work by decreasing the setting value compared to before the change, to a value larger than the setting value before the change. When the quality of work is improved by increasing the setting value compared to before the change, decreasing the setting value compared to before the change can be said to be a screen operation that conflicts with the screen operation that improved the quality of work. Conversely, when the quality of work is improved by decreasing the setting value compared to before the change, increasing the setting value compared to before the change can be said to be a screen operation that conflicts with the screen operation that improved the quality of work.

According to the above operation log management method, a conflicting screen operation is a screen operation that disables the erroneous loading prevention function when the normal loading rate (work quality, work success rate) is improved by enabling the erroneous loading prevention function through another screen operation. When the work quality is improved by enabling the erroneous loading prevention function, disabling the erroneous loading prevention function can be said to be a screen operation that conflicts with the screen operation that improved the work quality.

According to the above operation log management method, when an operator performs a screen operation, if the success rate (pickup rate, normal mounting rate) of the operation after the change of another screen operation similar to that performed does not meet the standard value, the operator is notified that the success rate of the operation may not meet the standard value, so that by having the operator redo the screen operation, the success rate of the operation is more likely to reach the standard value.

<Embodiment 3>
The operation log management device 3 according to the third embodiment reproduces the screen operations performed by the operator by displaying the screen operations in chronological order on the display unit 53 based on the operation log.
The playback of screen operations based on the operation log will be described with reference to Fig. 14. When playback of screen operations is instructed, the operation log management device 3 displays a screen operation playback screen 70 shown in Fig. 14. The screen operation playback screen 70 displays a start time 70A, an end time 70B, a production line number 70C, an equipment number 70D, a playback format selection field 70E (live or history), a play/stop button 70F, a rewind button 70G, a fast forward button 70H, and the like.

The start time 70A and end time 70B are items for specifying the time period during which screen operations performed are to be played back.
The production line number 70C is an item for specifying the number of the production line 2 for which the screen operation is to be reproduced.

The equipment number 70D is an item for specifying the equipment number of the equipment that is to be the target of screen operation playback among the equipment that constitutes the specified production line 2. "All" can also be specified as the equipment number. When "All" is specified, screen operations performed on all equipment that constitutes the production line 2 indicated by the specified production line number will be the target of playback.
The playback format selection field 70E is an item for specifying whether the screen operations performed by the operator are to be played back in real time (live playback) or past screen operations are to be played back retroactively (history playback).

When the operator presses the play/stop button 70F on the screen operation playback screen 70, the operation screens are displayed side by side in the order of the screen IDs registered in the transition system table. On the screen operation playback screen 70, operation screens with earlier operation times are displayed on the left. Immediately after each operation screen is displayed, the setting value before the change is displayed for each setting item on each operation screen. The equipment number of the equipment that was the subject of the change is displayed above each operation screen.

(1) History Playback and Live Playback As described above, there are two types of screen operation playback: live playback and history playback. Each of these will be explained below.

(1-1) History playback History playback refers to retroactively playing back screen operations performed in the past on the operation log management device 3 based on the transition log and operation log. For example, when a problem occurs, the operator plays back the history of screen operations to determine whether a change in a setting value was the cause of the problem.
Specifically, the operation log management device 3 extracts an operation screen ID from the transition system table based on the conditions (start time, end time, production line number, etc.) specified on the screen operation playback screen 70, and displays the operation screen indicated by the extracted operation screen ID on the screen operation playback screen 70. Then, the operation log management device 3 displays the screen operations performed on each operation screen in chronological order based on the operation logs registered in the operation system table (an example of a playback process).

For example, in the operation system log shown in FIG. 8, the nozzle descent deceleration rate is changed from 19% to 20% by the screen operation of ID001, and then the nozzle descent amount is changed from 3.31 mm to 3.34 mm. In this case, when the play/stop button 70F is pressed, the operation log management device 3 displays the nozzle descent deceleration rate and nozzle descent amount on the part selection screen 62 before the change for the first second, for example, and after one second has passed, it changes the nozzle descent deceleration rate to 20%. Then, after another second has passed, it changes the nozzle descent amount to 3.34 mm. This allows the screen operations to be played back.

However, it may be difficult for an operator looking at the screen operation playback screen 70 to tell which setting item's setting value has been changed. For this reason, it is preferable for the operation log management device 3 to display which setting item's setting value has been changed in a identifiable manner. Specifically, for example, the setting value before the change may be displayed in black letters (or numbers), and the setting value after the change may be displayed in red letters (or numbers).

The method of identifiably displaying which setting items have had their settings changed is not limited to this. For example, the background color of setting items whose settings have been changed may be displayed in a different color from the background color of setting items whose settings have not been changed, or the setting items whose settings have been changed may be displayed in a red frame. Alternatively, the changed setting values may be displayed in bold in red letters (or numbers).

(1-2) Live playback Live playback refers to displaying the screen operations indicated by the operation log on the display unit 53 each time an operation log is registered in the transition table or the operation table (one example of a playback process). For example, a monitor may monitor the screen operations of an operator to prevent an inexperienced operator from performing incorrect screen operations. In live playback, the screen operations indicated by the operation log are displayed each time the operator performs a screen operation and an operation log is registered, so that the monitor can monitor the screen operations being performed by the operator in almost real time, although there is a slight time difference.

(2) Effect of the embodiment According to the operation log management method of the third embodiment, the screen operations indicated by the operation log are displayed on the display unit 53 to replay the screen operations. This makes it easier to identify the screen operation that caused the problem compared to the case where the operation log is analyzed as is.

According to the above operation log management method, screen operations are played back in real time, so that a supervisor who monitors the screen operations performed by the operator can monitor the played back screen operations in real time, and if it is determined that the screen operations will result in a decrease in the quality of the work, the supervisor can inform the operator of this, thereby reducing the possibility of the quality of the work decreasing.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included in the technical scope disclosed in this specification.

(1) In the above embodiment, the surface mounter 14 is used as an example of the board work device, but the board work device is not limited to the surface mounter 14. For example, the board work device may be a screen printer 11, a print inspection machine 12, a dispenser 13, a post-mounting appearance inspection machine 15, a reflow device 16, a post-curing appearance inspection device 17, etc.

(2) In the above embodiment, the suction rate is used as an example of the success rate of the operation, but the success rate is not limited to this. For example, when the component E is suctioned by the suction nozzle 28B, the position of the component E relative to the suction nozzle 28B may be shifted. If the amount of misalignment of the component E relative to the suction nozzle 28B is defined as a success when the amount of misalignment is less than a predetermined value, the success rate may be the percentage of times when the amount of misalignment is less than a predetermined value when the operation of suctioning the component E by the suction nozzle 28B is performed multiple times. Also, for example, when the component E suctioned by the suction nozzle 28B is placed on the substrate P, the position of the component E relative to the substrate P may be shifted. If the amount of misalignment of the component E relative to the substrate P is defined as a success when the amount of misalignment is less than a predetermined value, the success rate may be the percentage of times when the operation of placing the component E suctioned by the suction nozzle 28B on the substrate P is performed multiple times.

3... Operation log management device 10... Loader (an example of a board working device)
11... Screen printing machine (an example of a substrate working device)
12... Printing inspection machine (an example of a board working device)
13... Dispenser (an example of a substrate working device)
14... Surface mounter (an example of a board working device)
15...Post-mounting appearance inspection machine (an example of a board working device)
16...Reflow device (an example of a board working device)
17...Post-curing appearance inspection device (an example of a substrate working device)
18...Unloader (an example of a substrate working device)
50...CPU (an example of a control unit)
52...Storage unit 53...Display unit

Claims (14)

1. An operation log management method for managing an operation log of a change operation that changes an operation of a board working device that performs work on a board, comprising:
an acquisition step of an operation log management device acquiring the operation log;
a storage step of the operation log management device storing the operation log acquired in the acquisition step in a storage unit;
an addition step in which the operation log management device adds quality information indicating whether or not quality of the work has deteriorated due to the change operation indicated by the operation log to the operation log stored in the storage unit;
a determination step in which the operation log management device determines whether or not the change operation indicated by the operation log newly acquired in the acquisition step is a change operation that may cause a decrease in quality of the work, based on other operation logs stored in the storage unit;
An operation log management method comprising: 2. The operation log management method according to claim 1,
An operation log management method including a first notification step of notifying an operator performing the change operation that the change operation has the potential to reduce the quality of the work when the operation log management device determines in the judgment step that the change operation has the potential to reduce the quality of the work. 3. The operation log management method according to claim 1, further comprising:
An operation log management method in which, in the judgment process, the operation log management device determines that the change operation indicated by the newly acquired operation log is a change operation that may reduce the quality of the work when the change operation is similar to the change operation indicated by another operation log to which quality information indicating that the quality of the work has been reduced is added. 4. The operation log management method according to claim 3,
The operation log management method, in the judgment step, the operation log management device judges that the change operation indicated by the newly acquired operation log is similar to the change operation indicated by the other operation log if the change operation is the same as the change operation indicated by the other operation log to which quality information indicating that the quality of the work has been deteriorated is added, or if the absolute value of the difference between the changed setting value of the change operation indicated by the newly acquired operation log and the changed setting value of the change operation indicated by the other operation log is less than a predetermined value. 5. The operation log management method according to claim 3, further comprising:
the quality information is information indicating whether or not a problem has occurred in the work due to the change operation,
An operation log management method, wherein the quality information indicating that the quality of the work has deteriorated is the quality information indicating that the trouble has occurred. 3. The operation log management method according to claim 1, further comprising:
An operation log management method in which, in the judgment process, the operation log management device determines that the change operation indicated by the newly acquired operation log is a change operation that may reduce the quality of the work when it is contradictory to the change operation indicated by another operation log to which quality information indicating that the quality of the work has been improved is added. 7. The operation log management method according to claim 6,
the quality information is information indicating a pre-change success rate indicating a success rate of the task before a change in a motion, and a post-change success rate indicating a success rate of the task after a change in a motion,
13. An operation log management method, comprising: the quality information indicating that the quality of the work has improved, the quality information being such that the post-change success rate is higher than the pre-change success rate. 8. The operation log management method according to claim 6, further comprising:
an operation log management method, wherein the conflicting change operation is at least one of a change operation that changes a setting value to a smaller setting value than the setting value before the change of the other change operation, which improves the quality of the work by increasing the setting value compared to before the change, and a change operation that changes a setting value to a larger setting value than the setting value before the change of the other change operation, which improves the quality of the work by decreasing the setting value compared to before the change. 8. The operation log management method according to claim 6, further comprising:
the change operation is an operation of switching between enabling and disabling a function of the board working apparatus,
An operation log management method, wherein the conflicting change operation is a change operation that disables the function when the quality of the work is improved by enabling the function with the other change operation. 8. The operation log management method according to claim 7,
The operation log management method includes a second notification step in which, when the change operation indicated by the newly acquired operation log is similar to the change operation indicated by another operation log to which the quality information indicating that the quality of the work has been improved is added, and when the post-change success rate of the other operation log is less than a reference value, the operation log management device notifies the operator performing the change operation that the success rate of the work may not meet the reference value. 11. The operation log management method according to claim 1, further comprising:
An operation log management method including a playback process for playing back the change operations after the fact by displaying the change operations indicated by the multiple operation logs stored in the memory unit in chronological order on a display unit. 12. The operation log management method according to claim 1, further comprising:
The operation log management method includes a playback process in which the operation log management device plays back the change operation indicated by the acquired operation log in real time by displaying the change operation indicated by the acquired operation log on a display unit each time the operation log is acquired in the acquisition process. An operation log management program for managing an operation log of a change operation for changing an operation of a board working device that performs work on a board,
An acquisition process for acquiring the operation log;
a storage process for storing the operation log acquired in the acquisition process in a storage unit;
an addition process of adding quality information indicating whether or not quality of the work has deteriorated due to the change operation indicated by the operation log to the operation log stored in the storage unit;
a determination process for determining whether or not the change operation indicated by the operation log newly acquired in the acquisition process is a change operation that may degrade the quality of the work, based on other operation logs stored in the storage unit;
An operation log management program that causes a computer to execute the above. An operation log management device for managing an operation log of a change operation for changing an operation of a board working device that performs work on a board,
A storage unit;
A control unit;
Equipped with
The control unit is
An acquisition process for acquiring the operation log;
a storage process for storing the operation log acquired in the acquisition process in the storage unit;
an addition process of adding quality information indicating whether or not quality of the work has deteriorated due to the change operation indicated by the operation log to the operation log stored in the storage unit;
a determination process for determining whether or not the change operation indicated by the operation log newly acquired in the acquisition process is a change operation that may degrade the quality of the work, based on other operation logs stored in the storage unit;
An operation log management device that executes the above.

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