JP7133751B2 - Work schedule creation method and work schedule creation system - Google Patents

Description

The present invention relates to a work schedule creation method and a work schedule creation system for creating a work schedule for a worker to perform work on manufacturing equipment.

A mounting line that manufactures mounting boards with components mounted on them is equipped with manufacturing equipment such as a screen printing machine that screen-prints solder paste onto the boards and a mounter that mounts components on the boards. The mounting line consumes materials such as solder paste and components in the process of continuously manufacturing mounted boards. For this reason, a plurality of workers have come to perform replenishment work of replenishing a plurality of manufacturing facilities with materials consumed in the mounting line. In recent years, there has been proposed a management system that predicts the time of occurrence of work for manufacturing equipment and informs the worker of the timing of the work (for example, Patent Literature 1). This management system has a function of adjusting the schedule so that work that is expected to occur during the worker's break time will be performed outside the break time.

Japanese Patent Application Laid-Open No. 2004-134691

However, in the prior art including Patent Document 1, there is a problem that the work that occurs during the break time is shifted to the time zone before and after the break time, so that the work is concentrated on the time zone before and after the break time. There is a problem that when the work is concentrated, the workers cannot keep up with the work, and the parts of the manufacturing equipment may be out of stock, resulting in the stoppage of the manufacturing of the mounting board.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a work schedule creation method and a work schedule creation system capable of creating a work schedule capable of suppressing production stoppages of manufacturing equipment.

A work schedule creation method of the present invention is a work schedule creation method for creating a work schedule for a worker to perform work on a manufacturing facility, wherein the manufacturing facility is targeted based on a production schedule in the manufacturing facility. Calculate the required work capacity required for the work for each of a plurality of time periods, and create a work schedule for performing the work for the manufacturing equipment based on the work schedule of each worker and the production schedule. and calculating, for each of the plurality of time zones, an actual work capacity combining the work capacities of the plurality of workers based on the work schedule and the work capacity of each individual worker, and calculating the request for each of the plurality of time zones Comparing the work capacity and the actual work capacity, and if there is a time zone in which the actual work capacity is insufficient with respect to the required work capacity, a rest period included in the time zone for the work schedule of at least one worker. Correction is made to shift the required work capacity to a time zone in which the actual work capacity is sufficient, and if there are a plurality of time zones in which the actual work capacity is sufficient for the required work capacity of the shift destination, the worker's A time zone with the smallest time difference from the break time defined in the work schedule is selected as the shift destination.

A work schedule creation system of the present invention is a work schedule creation system for creating a work schedule for a worker to perform work on a manufacturing facility, and targets the manufacturing facility based on a production schedule in the manufacturing facility. A required work capacity calculation unit that calculates the required work capacity required for the work for each of a plurality of time periods, and to perform the work for the manufacturing equipment based on the work schedule of each worker and the production schedule. and a work schedule creation unit that creates a work schedule, and based on the work schedule and the work capabilities of the individual workers, calculates the actual work capabilities that combine the work capabilities of the plurality of workers for each of the plurality of time periods. and an actual work capacity calculation unit that compares the required work capacity and the actual work capacity for each of the plurality of time slots, and if there is a time zone in which the actual work capacity is insufficient with respect to the required work capacity, at least a work schedule correction unit for correcting a work schedule of one worker by shifting a rest period included in the time period to a time period in which the actual work capacity is sufficient with respect to the required work capacity; When there are a plurality of time periods in which the actual work capacity is sufficient for the required work capacity of the shift destination, the correction unit selects the time that has the smaller time difference from the break time defined in the work schedule of the worker. A band is selected as the shift destination.

ADVANTAGE OF THE INVENTION According to this invention, the work schedule which can suppress the production stop of a manufacturing facility can be created.

1 is an explanatory diagram of the configuration of a component mounting system according to an embodiment of the present invention; FIG. 1 is a block diagram showing the configuration of a work schedule creation system according to an embodiment of the present invention; FIG. 1 is an explanatory diagram of an example of a production schedule used in a component mounting system according to one embodiment of the present invention; FIG. (a) Explanatory diagram of an example of the work schedule before the break time is shifted (b) An explanatory diagram of an example of the work schedule after the shift of the break time created by the work schedule creation system according to the embodiment of the present invention FIG. 2 is a diagram showing the flow of work schedule creation by the work schedule creation system according to one embodiment of the present invention; FIG. 4 is a diagram showing the flow of break time shift processing by the work schedule creation system according to one embodiment of the present invention;

An embodiment of the present invention will be described in detail below with reference to the drawings. The configuration, shape, etc. described below are examples for explanation, and can be changed as appropriate according to the specifications of the component mounting system and the component mounting line.

First, a component mounting system 1 will be described with reference to FIG. The component mounting system 1 includes, in order from the upstream side (left side in FIG. 1) in the board transfer direction, a board supply device 2, a screen printer 3, a mounting machine 4, a mounting machine 5, a reflow device 6, and a board recovery. A device 7 is provided. Each manufacturing facility has a substrate transport mechanism such as a belt conveyor, and forms a component mounting line 8 that manufactures mounted substrates while transporting the substrate from upstream to downstream by the substrate transport mechanism of each manufacturing equipment. The screen printer 3, the mounting machine 4, and the mounting machine 5 are connected to a mounting line monitoring system 10 and a management computer 11 via a wired or wireless communication network 9. Data can be sent and received.

In FIG. 1, a substrate supply device 2 has a function of taking out substrates from a rack storing a plurality of substrates and supplying them to downstream manufacturing equipment. The screen printer 3 has a function of printing pasty cream solder onto a board through a screen mask. The two mounters 4 and 5 have a function of picking up a component supplied from a component supply section by means of a component suction nozzle attached to a mounting head, and transferring and mounting the component to a mounting point of a board on which cream solder is printed. A carriage 12 that holds a component supply unit for supplying components is attached to each component supply unit of the mounters 4 and 5 . The reflow device 6 has a function of heating the board on which the component is mounted to melt the cream solder and solidify it to solder the component to the board. The substrate recovery device 7 has a function of recovering the mounting substrates to which the components are soldered and storing them in a rack.

The mounting line monitoring system 10 monitors the operating status of the component mounting line 8 and notifies the manager of the status. Specifically, the monitor displays data indicating the condition of the component mounting line 8, such as the number of substrates processed by each manufacturing equipment, the stop time, the number of component pick-up failures and errors occurring in the mounting machines 4 and 5, and the like. have a function. The management computer 11 manages the production schedule of the mounted boards manufactured in the component mounting line 8, prepares the worker's work schedule, and downloads the programs and data necessary for the production of the mounted boards to each manufacturing equipment. Run.

In the component mounting line 8, model switching is performed to switch the type of mounting substrate to be manufactured based on the production schedule. At the time of model switching, in the screen printing machine 3, the operator adjusts the conveyor width of the board transport mechanism for transporting the board, replaces the screen mask, changes the printing conditions, and the like. In the mounting machines 4 and 5, operators perform model switching work such as adjustment of the conveyor width, replacement of the carriage 12, replacement of component suction nozzles, and change of mounting data. In addition, while the manufacturing equipment is manufacturing the mounting board, a preparatory work (hereinafter referred to as "outside setup") of setting in advance the component supply unit to be used for the production of the mounting board to be manufactured next on the spare carriage 12 is performed. ) is performed by the operator.

Next, referring to FIG. 2, the configuration of the management computer 11 will be described. The management computer 11 includes a processing unit 20, a production schedule storage unit 26, a work schedule storage unit 28, a worker information storage unit 30, a work rule information storage unit 32, and an output unit . The processing unit 20 is a data processing device such as a CPU, and includes a required work capacity calculation unit 21, a work schedule creation unit 22, an actual work capacity calculation unit 23, and a work schedule correction unit 24 as internal processing units. The production schedule storage unit 26 stores a production schedule 27 including information on manufacturing mounted boards in the component mounting line 8 for a predetermined period such as one day or one week.

An example production schedule 27 will now be described with reference to FIG. Here, a production schedule 27 for mounting boards produced in one day (8 hours) is shown. The production schedule 27 is divided into eight time periods T1 to T8 of one hour each. Note that the division of the time periods T1 to T8 is not limited to 1-hour units, and may be divided into 15-minute units or the like.

In FIG. 3, the component mounting line 8 is scheduled to manufacture a mounting board for the product A from time slot T1 to time slot T4, and to manufacture a mounting board for product B from time slot T5 to time slot T8. During the manufacture of the mounting board, it is predicted that the component supply units attached to the mounting machines 4 and 5 will be required to replenish the components at the timings indicated by the white triangles in the drawing. In particular, it is predicted that parts shortage rushes R1 and R2, in which parts shortages occur intensively in a plurality of parts supply units, occur during time period T2 and time period T7. For this reason, a lot of parts replenishment work is scheduled intensively during the time period T2 and the time period T7.

During the period from time T2 to time T3 during which the mounting board for product A is being manufactured, the operator sets the component supply unit to be used for manufacturing the mounting board for product B to be manufactured next on the spare cart 12. Arrangements are scheduled. Further, during the period T7 to T8 during which the mounting board for product B is being manufactured, the worker sets a component supply unit to be used for manufacturing the mounting board for product C to be manufactured next, on the spare cart 12. Out-of-office setup is planned. Furthermore, during time period T4, model switching work is scheduled to switch the type of mounting substrate manufactured by the manufacturing equipment of the component mounting line 8 from product A to product B. FIG.

In FIG. 2, the required work capacity calculation unit 21 calculates the required work capacity required for work on the manufacturing equipment for each of a plurality of time periods T1 to T8 based on the production schedule 27 for the manufacturing equipment of the component mounting line 8. Calculate to The calculated required work capacity is associated with the production schedule 27 and stored in the production schedule storage unit 26 .

Below the production schedule 27 in FIG. 3, the required work capacity calculated for each time period T1 to T8 is displayed. The required work capacity is defined as the required work amount calculated from the content and amount of work that occurs in each time period T1 to T8, and the work amount that a standard worker can perform in each time period T1 to T8. 1.0”. In this example, the required work capacity of 2.8 is required during time slot T2, in which the part-out rush R1 and the off-line setup for product B overlap, and in the time slot T7, in which the part-out rush R2 and off-line setup for product C overlap. is calculated to require a required work capacity of 2.7.

In FIG. 2, the worker information storage unit 30 stores worker information 31 of workers in charge of work on the component mounting line 8 for each worker. The worker information 31 includes an identification number for identifying the worker, a predetermined work schedule including break times, work capacity of the worker, past work performance, and shift times when the break time is shifted from the predetermined work schedule. It includes the break time difference cumulative value, the number of shifts during break time, and the like. In this manner, the worker information storage unit 30 serves as a storage unit that stores past information regarding shifts of break times for each worker.

The work schedule creation unit 22 creates a schedule for performing work targeting manufacturing equipment based on the predetermined work schedule of each worker and the production schedule 27 included in the worker information 31 stored for each worker. A work schedule 29 is created. The created work schedule 29 is stored in the work schedule storage unit 28 .

Here, an example of the work schedule 29 will be described with reference to FIG. 4(a). FIG. 4(a) shows the work of three workers, a worker 1 with a work capacity of "1.3", a worker 2 with a work capacity of "1.0", and a worker 3 with a work capacity of "0.9". This is a work schedule 29 created so that a person is in charge of work on the component mounting line 8. FIG. In the eight-hour working time (time periods T1 to T8), short rest periods are set in time periods T2 and T7, and long rest periods are set in time periods T4 to T5. In the predetermined work schedule, three workers 1 to 3 are set to take a break at the same time.

In FIG. 2, the actual working capacity calculating unit 23 calculates a plurality of actual working capacities by combining the working capacities of the workers 1 to 3 based on the work schedule 29 and the working capacities of the individual workers 1 to 3. is calculated for each time period T1 to T8. The calculated actual work capacity is associated with the work schedule 29 and stored in the work schedule storage unit 28 .

Below the work schedule 29 in FIG. 4(a), the actual work capacity calculated for each time period T1 to T8 is shown. The work capacity of workers 1 to 3 during the break time is subtracted from the actual work capacity. In other words, the total work capacity of worker 1, worker 2, and worker 3 is "3.2", but the actual work capacity of time zone T2 and time zone T7 with short breaks is "2". .5”, and the actual work capacity of the time period T4 and the time period T5 with long breaks is calculated as “2.0”.

In FIG. 2, the work schedule correction section 24 compares the required work capacity stored in the production schedule storage section 26 with the actual work capacity stored in the work schedule storage section 28 for each of a plurality of time periods T1 to T8. , determines whether or not there are time periods T1 to T8 in which the actual work capacity is insufficient with respect to the required work capacity. Then, if there are time periods T1 to T8 in which the actual work capacity is insufficient with respect to the required work capacity, the work schedule correction unit 24 adjusts the work schedule 29 of at least one worker 1 to 3 to the time periods T1 to T8. Correction is made by shifting the included break time to the time zone T1 to T8 in which the actual work capacity is sufficient for the required work capacity.

Here, a specific example of the work schedule 29 corrected by the work schedule correction unit 24 will be described with reference to FIG. 4(b). First, the work schedule correction unit 24 compares the required work capacity shown in FIG. 3 with the actual work capacity shown in FIG. 4(a) for each of time periods T1 to T8. In this example, the required work capacity in the time period T2 is "2.8" and the actual work capacity is "2.5", and the required work capacity in the time period T7 is "2.7". The work capacity is "2.5", which is insufficient. Further, in the time period T4 and the time period T5, the required work capacity is "1.9" and the actual work capacity is "2.0", which is not enough, but not insufficient. During the other time periods T1, T3, T6, and T8, there is a margin in the actual work capacity with respect to the required work capacity.

In FIG. 4(b), the work schedule correction unit 24 shifts the break time of the workers 1 to 3 in the time zone T2 when the actual work capacity is insufficient to the time zone T1 or the time zone T3 when there is an extra time. In this example, the work schedule correction unit 24 calculates the time difference between the rest period of the time period T2 of the workers 2 and 3 and the rest period of the default work schedule of the workers 2 and 3 shown in FIG. is shifted to the time period T3, which has less As a result, the actual work capacity in the time zone T2 becomes "2.9", and although there is little margin for the required work capacity of "2.8", the shortage is resolved. In addition, the actual work capacity of the time period T3 in which the break time of workers 2 and 3 is shifted is "2.8", but there is a margin for the required work capacity of "2.1".

In this way, the work schedule correction unit 24, when there are a plurality of time periods T1 to T8 (time period T1 and time period T3) in which the actual work capacity is sufficient for the required work capacity of the shift destination, the workers 2 and 3 A time zone T3 that has the smallest time difference from the break time defined in the predetermined work schedule is selected as a shift destination. Note that if there are a plurality of time slots with the smallest time difference, the time slot in which the actual work capacity has a margin with respect to the required work capacity is selected. Similarly, the work schedule correction unit 24 shifts the rest period of worker 1 to time period T6 among the rest periods of workers 1 to 3 in time period T7 when the actual work capacity is insufficient. As a result, the actual work capacity in the time period T7 becomes "2.8", and although there is little margin for the required work capacity of "2.7", the shortage is resolved. In addition, the actual work capacity of the time period T6 in which the break time of the worker 1 is shifted is "2.9", but there is a margin with respect to the required work capacity of "2.0".

In addition, the priority order setting unit 25 of the work schedule correction unit 24, when shifting the break time, based on past information such as the work record, break time difference cumulative value, and the number of shifts included in the worker information 31, determines the break time. Set priorities for selecting workers 1-3 for time shifts. As a result, it is possible to fairly determine the shift of the break time so that the shift of the break time is not concentrated on specific workers 1-3. The work schedule 29 after correction is stored in the work schedule storage unit 28 . Thus, the management computer 11 serves as a work schedule creation system for creating the work schedule 29 for the workers 1 to 3 to work on the manufacturing equipment of the component mounting line 8 .

In FIG. 2, work rule information 33 is stored in the work rule information storage unit 32 . The work rule information 33 includes working hours and break times determined by the work rules, such as the maximum continuous work time that can be worked continuously without taking a break, the minimum cumulative break time that should be obtained in one day's work, etc. contains the rules of The work schedule correction unit 24 checks whether the work schedule 29 after the work schedule 29 after the shift of the rest period violates the rules defined in the work rule information 33 . The output unit 34 is a display device such as a liquid crystal panel or a printing device such as a printer, and displays various data stored in each storage unit. Display the request for more workers when it is not possible.

Next, according to the flow of FIGS. 5 and 6 and referring to FIGS. 3 and 4, the workers 1 to 3 create a work schedule 29 for performing work on the manufacturing equipment of the component mounting line 8. Explain how to create a schedule. In FIG. 5, the processing section 20 of the management computer 11 first acquires the production schedule 27 from the production schedule storage section 26 (ST1).

Next, the required work capacity calculation unit 21 calculates the required work capacity required for the work on the manufacturing equipment for each of a plurality of time periods T1 to T8 based on the production schedule 27 acquired in ST1 (ST2: Request work capacity calculation step) (see FIG. 3). Next, the processing section 20 acquires the worker information 31 of the workers 1 to 3 in charge of the component mounting line 8 from the worker information storage section 30 (ST3).

In FIG. 5, the work schedule creation unit 22 then creates a provisional work schedule 29 for carrying out work on the manufacturing equipment based on the acquired predetermined work schedules of the individual workers 1 to 3 and the production schedule 27. (ST4: provisional work schedule creation step) (see FIG. 4(a)). Next, based on the work schedule 29 and the work capacities of the individual workers 1-3, the actual work capacity calculation unit 23 calculates the actual work capacities, which are the combined work capacities of the workers 1-3, for a plurality of time zones T1 to T1. It is calculated every T8 (ST5: actual work capacity calculation step) (see FIG. 4A).

Next, the work schedule correction unit 24 compares the required work capacity and the actual work capacity for each of the plurality of time zones T1 to T8, and determines whether there are time zones T1 to T8 in which the actual work capacity is insufficient with respect to the required work capacity. (ST6). In FIG. 4(a), it is determined that the actual work capacity is insufficient in the time period T2 and the time period T7 (Yes in ST6), and the work schedule correction unit 24 executes break time shift processing (ST7: break time shift processing). process).

In the break time shift process shown in FIG. 6, first, the work schedule correction unit 24 selects the temporary work schedule 29 from workers 1 to 3 who have a small break time shift count and a break time difference accumulated value and a high break time allocation order. The break times of the time zones T2 and T7 in which the actual work capacity is insufficient are searched for and selected (ST11). In FIG. 4(a), it is assumed that worker 2, worker 3, and worker 1 have the highest break time allocation order. In this case, the work schedule correction unit 24 selects to shift the break time of the worker 2 in the early time zone T2.

Next, the work schedule correction unit 24 recalculates the actual work capacity when the rest period is shifted to the time period T1 or the time period T3 in which there is a margin in the actual work capacity before and after the time period T2 of the selected break time. , and the required work capacity to determine whether or not the shift is possible (ST12). At that time, the work schedule correction unit 24 also confirms whether or not there is any deviation from the work rule information 33 after the break time shift.

In FIG. 6, next, if there is a time slot in which a shift is possible, the work schedule correction unit 24 determines that time slot as a shift destination (ST13). At this time, if there are multiple time slots in which the actual work capacity is sufficient for the required work capacity of the shift destination, the time slot with the smaller time difference from the break time specified in the fixed work schedule of worker 2 is selected. Select as a shift destination. In the example of FIG. 4(b), the time slot T3 is selected as the shift destination for the break time of the worker 2 in the time slot T2.

Next, the priority order setting unit 25 sets the past information on the shift of the break time such as the work record of the worker information 31 of the worker 2, the break time difference cumulative value, the number of shifts, etc., corresponding to the selected shift of the break time. Then, the rest time change priority is reset (ST14). Next, the work schedule correction unit 24 updates the temporary work schedule 29 based on the above (ST15). In this way, the work schedule correction unit 24 corrects the work schedule 29 of at least one worker 2 by shifting the rest period included in the time zone T2 to the time zone T3 in which the actual work capacity is sufficient for the required work capacity. I do.

In FIG. 6, ST11 to ST15 are repeated until there are no more time zones T2, T7 in which the actual work capacity is insufficient with respect to the required work capacity (ST16). As a result, the work schedule 29 is updated so that the break time of the worker 3 in the time slot T2 is shifted to the time slot T3, and the break time of the worker 1 in the time slot T7 is shifted to the time slot T6. In this way, by repeating ST11 to ST15, in ST14, the past information regarding the shift of the break time for each of workers 1 to 3 is stored in the worker information 31, and when the shift of the break time is to be performed, the past information is stored based on the past information. , and ST11, the workers 1 to 3 to be shifted during the break time are selected. As a result, the work schedule 29 can be corrected so that the shifts of break times are fair to the workers 1-3.

Next, the work schedule correction unit 24 determines whether or not all the time periods in which the actual work capacity is insufficient with respect to the required work capacity have been eliminated (ST17). If the shortage of hours cannot be resolved (No in ST17), the work schedule correction unit 24 causes the output unit 34 to display a worker increase request (ST18). If the insufficient time slot has been resolved (Yes in ST17), in FIG. 5, the work schedule correction unit 24 registers the temporary work schedule 29 as the formal work schedule 29 in the work schedule storage unit 28 (ST8). . If it is determined in ST6 that there is no time period in which the actual work capacity is insufficient (No), ST8 is similarly executed and the provisional work schedule 29 is registered as the formal work schedule 29 .

As described above, the management computer 11 of the present embodiment calculates the required work capacity for each of the time periods T1 to T8 based on the production schedule 27, Based on the work schedule 29, the actual work capacity is calculated for each of the time zones T1 to T8 based on the work schedule 29 and the work capacity of the workers 1 to 3, and the time zones T1 to T8 in which the actual work capacity is insufficient. If there is, it becomes a work schedule creation system that creates a work schedule 29 in which the break time of at least one worker 1 to 3 is shifted to the time zone T1 to T8 in which the actual work capacity is sufficient.

As a result, it is possible to create the work schedule 29 that eliminates the time periods T1 to T8 in which the actual work capacity is insufficient with respect to the required work capacity, and suppresses the production stoppage of the manufacturing equipment.

In the above description, the screen printing machine 3, the mounting machines 4, 5, etc. provided in the component mounting line 8 for manufacturing the mounting board are described as examples of the manufacturing equipment targeted by the work schedule 29, but the manufacturing equipment is limited to these. never For example, it may be a production facility provided in a production line for assembling home electric appliances, or a production facility provided in a food production line for producing processed food.

INDUSTRIAL APPLICABILITY The work schedule creation method and work schedule creation system of the present invention have the effect of being able to create a work schedule that can suppress production stoppages of manufacturing equipment, and are useful in the field of mounting components on boards. .

3 Screen printer (manufacturing equipment)
4, 5 Mounting machine (manufacturing equipment)
11 Management computer (work schedule creation system)

Claims (6)

A work schedule creation method for creating a work schedule for a worker to perform work on manufacturing equipment, comprising:
Based on the production schedule of the manufacturing equipment, calculating the required work capacity required for the work for the manufacturing equipment for each of a plurality of time periods,
creating a work schedule for performing work on the manufacturing equipment based on the work schedule of each worker and the production schedule;
calculating, for each of the plurality of time zones, an actual work capacity combining the work capacities of a plurality of workers based on the work schedule and the work capacities of the individual workers;
Comparing the required work capacity and the actual work capacity for each of the plurality of time slots, and if there is a time zone in which the actual work capacity is insufficient with respect to the required work capacity, the work schedule of at least one worker correcting the break time included in the time slot to a time slot in which the actual work capacity is sufficient with respect to the required work capacity;
When there are a plurality of time slots in which the actual work capacity is sufficient for the required work capacity of the shift destination, the time zone with the smallest time difference from the break time specified in the work schedule of the worker is selected as the shift destination. Select as the work scheduling method. storing past information about shifts of the break time for each worker;
2. The method of creating a work schedule according to claim 1, wherein when the shift of the break time is to be performed, a worker to be subject to the shift of the break time is selected based on the past information. 3. The work according to claim 1 or 2, wherein when there are a plurality of time slots with the smallest time difference, the time slot in which the actual work capacity has a margin with respect to the required work capacity is selected as the shift destination. How to create a schedule. A work schedule creation system for creating a work schedule for workers to perform work on manufacturing equipment,
a required work capacity calculation unit that calculates, for each of a plurality of time periods, a required work capacity required for work on the manufacturing facility based on a production schedule for the manufacturing facility;
a work schedule creation unit that creates a work schedule for performing work on the manufacturing equipment based on the work schedule of each worker and the production schedule;
an actual work capacity calculation unit that calculates an actual work capacity combining the work capacity of a plurality of workers for each of the plurality of time zones based on the work schedule and the work capacity of the individual worker;
Comparing the required work capacity and the actual work capacity for each of the plurality of time slots, and if there is a time zone in which the actual work capacity is insufficient with respect to the required work capacity, the work schedule of at least one worker a work schedule correction unit that corrects the break time included in the time period to a time period in which the actual work capacity is sufficient with respect to the required work capacity,
When there are a plurality of time zones in which the actual work capacity is sufficient for the required work capacity of the shift destination, the work schedule correction unit reduces the time difference between the worker's break time and the work schedule defined in the work schedule. A work schedule creation system that selects one of the time periods as the shift destination. Further comprising a storage unit for storing past information on the shift of the break time for each worker,
5. The work schedule creation system according to claim 4, wherein when the work schedule is to be shifted, the work schedule correction unit selects the workers to be subjected to the shift of the work break based on the past information. 3. When there are a plurality of time slots with the smallest time difference, the work schedule correction unit selects a time slot in which the actual work capacity has a margin with respect to the required work capacity as the shift destination. The work schedule creation system according to 4 or 5.

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