JP7314043B2 - PRODUCTION PLANNING SUPPORT SYSTEM AND PRODUCTION PLANNING SUPPORT METHOD - Google Patents

Description

The present invention relates to a production planning support system and a production planning support method.

In order to efficiently produce various products while meeting delivery dates, it is essential to formulate appropriate production plans that match the product items. A standard time set for each process of the item to be produced is used for drafting this production plan. According to JIS Z 8141 of Japanese Industrial Standards, standard time is defined as "the time required for an apt and proficient worker to carry out the work at a normal work pace with the necessary margin under prescribed work conditions." In this way, the standard time is the time that a virtual worker would need to perform the work under virtual working conditions, so when actually working on the item or process, it often takes longer than the set standard time due to fluctuations in the actual time required. Therefore, even if a production plan is simply drawn up using the standard time, the production may be delayed, and the delay will spread to subsequent processes. In order to deal with this, there is a method of including a predetermined spare time in advance in the standard time.

However, if the slack time is included in the standard time, it is necessary to set the standard time including the slack time for each combination of item and process. In this case, when the target products of the production plan are of various types, it is necessary to set an appropriate spare time for each standard time for all types and items. Considering and setting such spare time requires a lot of labor, which is not realistic in terms of operation of production planning work.

On the other hand, it is conceivable to set a uniform slack time for each item and process and include it in the standard time without considering the difference in the types of target products. If the standard time is set with a long spare time for any process, the work may be completed in a shorter time than the standard time depending on the skill of the worker, or the worker may be given an excessive amount of spare time.

In this respect, for example, Japanese Patent Application Laid-Open No. 2002-258930 (Patent Document 1) discloses that, in order-receiving industry production planning, the surplus time is distributed to each production process, and scheduling is performed independently for each process, with the aim of improving the production efficiency in each process. Redistributing slacks to processes and determining scheduling after free movement ranges are disclosed (abstract).

JP-A-2002-258930

However, if the surplus time is calculated based on the start possible date and time, the limit date and time, and the total actual work required time as in Patent Document 1, it is not possible to take into consideration the special case surplus time that is not included in the normal total actual work required time. If the work time exceeds the standard time, various factors can be considered, such as the worker assigned to a certain process being unfamiliar with the work in that process, the production planning target being a prototype, and the work time greatly exceeding the normal standard time, or the worker undergoing on-the-job training (OJT) in a certain process. In Patent Literature 1, no consideration is given to setting the margin time in such a special case.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and one of its purposes is to provide a production planning support system and a production planning support method that can efficiently set an appropriate standard time even when planning a production plan for a wide variety of products, and can also set an appropriate surplus time for various factors.

In order to achieve the above object, according to one aspect of the present invention, there is provided a production result storage unit configured with a memory and a processor, and recording, for each of a plurality of steps included in the production process of an item that constitutes a product, the item and the step, and the work time required for the work performed in the step in association with each other; andBy subtracting the standard time from the average value of the working hours obtained from the distribution of the working hours corresponding to the standard hours,A production planning support system is provided, comprising: a slack time setting unit that calculates a slack time to be set for a process; and a process accumulating unit that acquires the sum of the standard time set by the standard time setting unit and the slack time calculated by the slack time setting unit as a work load, which is the time allocated to each process, and adds up the work load for each item on a daily basis to generate an implementation process for each process of each item.

The process integration unit may integrate the workload for each day in order of the delivery date of each item.

The process accumulator may accumulate the work loads in ascending order of the leeway time included in each of the work loads.

The standard time setting unit may calculate the variance for each work time group, and the process integration unit may integrate the workloads in ascending order of the variance calculated for each of the workloads when accumulating the workloads.

The process accumulating unit may integrate the workloads so that the spare time included in each workload is leveled over the planned period.

A process integration result output unit may be provided for graphically displaying the work load for each day integrated by the process integration unit for each day in the form of a column, and the process integration result output unit may display the sum of the spare time included in the work load for each day as one area in the column.

By designating one of the workloads in the daily workload accumulated by the process accumulation unit, the process accumulation unit may delete the margin time set for the workload.

In another aspect of the present invention, an information processing device configured by a memory and a processor records, for each of a plurality of processes included in the production process of an item constituting a product, the item and the process, and the work time required for the work performed in the process in association with each other, obtains a plurality of work times for a predetermined process for a predetermined item from the recorded item and the work time, extracts the most frequently worked time from the group of the work times, sets the work time with the highest frequency, sets the standard time and the work corresponding to the standard time. a production planning support method of calculating a surplus time to be set for the process based on the time, acquiring the sum of the set standard time and the calculated surplus time as a workload, which is the time allocated to each process, and accumulating the workload for each item on a daily basis to generate an implementation process for each process of each item.

According to one aspect of the present invention, it is possible to provide a production planning support system and a production planning support method that can efficiently set an appropriate standard time even when planning a production plan for a wide variety of products, and can also set an appropriate margin time for various factors.

FIG. 1 is a diagram showing a configuration example of a production planning support system 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration example of the actual production table 361. As shown in FIG. FIG. 3 is a diagram showing a configuration example of the standard time/margin time table 362. As shown in FIG. FIG. 4 is a diagram showing a configuration example of the order table 363. As shown in FIG. FIG. 5 is a diagram showing a configuration example of the production process table 364. As shown in FIG. FIG. 6 is a diagram showing a configuration example of the production capacity table 365. As shown in FIG. FIG. 7 is a diagram showing a configuration example of the special spare time table 366. As shown in FIG. FIG. 8 is a flow chart showing an example of the flow of production planning support processing executed by the production planning support system 1. As shown in FIG. FIG. 9 is a diagram showing an example of a planning condition input screen of the production planning support system 1. As shown in FIG. FIG. 10 is a diagram showing an example of a work time histogram. FIG. 11 is a diagram showing an output example of the result of process integration.

An embodiment of the present invention will be described in detail below with reference to the drawings.

<Production Planning Support System>
FIG. 1 shows a configuration example of a production planning support system 1 according to one embodiment of the present invention. The production planning support system 1 supports the planning of production plans that enable productivity improvement for various production items through the standard time setting process and margin time setting process of the present invention. The production planning support system 1 (hereinafter also referred to as "system 1") of FIG. 1 has a configuration equivalent to that of a general computer system, and includes a processor 100, a main storage device 200, an auxiliary storage device 300, an input device 400, an output device 500, a communication device 600, and an internal bus 700 that connects the above-mentioned units so as to be able to communicate with each other.

The processor 100 is an arithmetic device such as a central processing unit (CPU), a microprocessor unit (MPU), or the like. The main memory device 200 is composed of storage devices such as read only memory (ROM) and random access memory (RAM). The auxiliary storage device 300 is composed of a relatively large-capacity storage device such as a hard disk drive (HDD) or a semiconductor drive (SSD). The input device 400 is composed of data input devices such as a keyboard, mouse, touch panel, and voice input device. The output device 500 includes output devices such as various displays, printers, and audio output devices. The communication device 600 is composed of a communication device such as a network interface card that enables wired or wireless communication between the system 1 and other computers. An internal bus 700 is a data communication path inside the system 1 . The above is the hardware configuration of the production planning support system 1 of FIG.

The auxiliary storage device 300 stores programs for executing data processing in the system 1 and data used by these programs for data processing. The processor 100 reads out these programs into the main storage device 200 and executes them, thereby realizing production planning support processing of the system 1 .

The program includes a standard time setting unit 310 having a function of setting a standard time for each process of each item, a slack time setting unit 320 having a function of setting leeway time for each process of each item, a process accumulating unit 330 having a function of generating a production plan by accumulating (stacking) the standard time and the leeway time obtained above, a process accumulating result output unit 340 having a function of outputting the accumulation result by the process accumulating unit 330, and planning for inputting the conditions of production planning by the system 1. This is the condition input section 350 . The auxiliary storage device 300 also stores a management program (operating system) for managing data input/output processing as a computer of the system 1, but the illustration is omitted for the sake of simplicity.

Next, data stored in the auxiliary storage device 300 will be described. The auxiliary storage device 300 stores a production performance table 361 (production performance storage unit), a standard time/surplus time table 362 (standard time/surplus time storage unit), an order table 363 (order storage unit), a production process table 364 (production process storage unit), a production capacity table 365 (production capacity storage unit), and a special slack time table 366 (special slack time storage unit). Note that the data need not necessarily be stored in a table format, and may be stored in another format. Each table will be described below based on its configuration example.

FIG. 2 shows a configuration example of the actual production table 361. As shown in FIG. The production performance table 361 stores performance data of various product items produced in the past at production facilities (factories, etc.) targeted for production planning by the production planning support system 1 of this embodiment. The production result table 361 of FIG. 2 stores records including data corresponding to the items of order, item, process, start time, end time, worker, and equipment. An order is an identification code for mutually identifying orders for a certain product item. Item is an identification code for identifying the product item specified by the corresponding order. A process indicates a work type in a production process executed by a corresponding order. The start time and end time indicate the start and end times of the work specified in the corresponding process. The worker is an identification code that identifies the person who performed the work in the corresponding process. Equipment is an identification code that identifies the equipment used to perform the work in the corresponding process. The first record in FIG. 2 records that the order specified by M331 is related to the cutting process of product item A001, that the cutting process started at 9:01:15 on August 1 and ended at 11:25:01 on the same day, that worker X was in charge of the cutting process, and that machining center A was used as equipment. In the present invention, it is not always necessary to provide the items of workers and equipment, but by adding these items, it is possible to set the standard time and spare time taking into consideration the workers in charge and the equipment to be used, thereby further improving productivity.

FIG. 3 shows a configuration example of the standard time/margin time table 362. As shown in FIG. The standard time/margin time table 362 stores the standard time and margin time defined in advance for each process of an item. In the standard time/margin time table 362 of FIG. 3, the top record indicates that the standard time is set to 151 minutes and the margin time is 26 minutes for the cutting process of item A001. A method of calculating the standard time and the margin time will be described later.

FIG. 4 shows a configuration example of the order table 363. As shown in FIG. The order table 363 stores delivery dates for items related to specific orders. In the order table 363 of FIG. 4, the top record indicates that the delivery date of the item A001 included in the order M331 is October 25th. The order table 363 may store corresponding orders, items, and production-startable dates corresponding to delivery dates.

FIG. 5 shows a configuration example of the production process table 364. As shown in FIG. The production process table 364 stores the execution order of steps included in the production process of a certain item as the order of steps (routine). For example, some items generally cannot be painted before cutting the material. FIG. 5 shows this in the top record. That is, for the item A001, the cutting process is route 1 and the painting process is route 2, and this order cannot be changed. This rule is applied to the accumulating (pile-up) process of steps, which will be described later.

FIG. 6 shows a configuration example of the production capacity table 365. As shown in FIG. The production capacity table 365 records, as the production capacity, the upper limit of workable hours per day for a certain process. In the example of the first record in FIG. 6, for the cutting process, it is shown that the production capacity, which is the upper limit of workable hours per day using machining center A as equipment, is 960 minutes. In the example of FIG. 6, the additional production capacity is also recorded for the corresponding process. The additional production capacity indicates the upper limit of the work hours that can be additionally performed by the worker in addition to the normal working hours due to early work and overtime, and in the example of FIG. The production capacity and additional production capacity are used as upper limits per day when accumulating standard hours and extra hours for each process. The details will be described later. Although it is not always necessary to provide an equipment item in the production capacity table 365, if this item is added, differences in production capacity due to differences in the equipment used can be taken into account in planning production, which is thought to contribute to improved productivity. Also, there may be a pattern in which the production capacity table 365 does not have a process item. In that case, it is possible to set restrictions on the time during which the equipment can be used regardless of the difference in the process.

FIG. 7 shows a configuration example of the special spare time table 366. As shown in FIG. The special slack time table 366 predefines the slack time under special conditions in which the slack time set in the standard time/slack time table 362 of FIG. 3 cannot be applied in advance for each item and process. In the example of FIG. 7, the OJT leeway time and prototype leeway time are recorded for the corresponding items and processes. These are pre-specified and recorded special leeway times to be applied when OJT is performed by workers in the relevant process, or when prototypes are processed in the relevant process. In the example of FIG. 7, for the cutting process of item A001, 40 minutes are specified as OJT margin time and 52 minutes as prototyping margin time. These special marginal times are set longer than the corresponding marginal times defined in the standard time/marginal time table 362 of FIG. Such a special margin time is not limited to OJT and prototype processing, and can be recorded in advance in the special margin time table 366 as needed.

<Production planning process>
Next, the production planning process executed by the production planning support system 1 having the configuration described above will be described. FIG. 8 is a flow chart showing an example of production planning processing flow by the production planning support system 1 of this embodiment.

When the production planning support system 1 is activated and processing is started, the planning condition input unit 350 refers to the planning conditions input from the input device 400, and first acquires the identification code of the designated order (S100). Here, it is assumed that M331 is specified as a production planning target. In that case, the planning condition input unit 350 acquires M331 as an order.

FIG. 9 shows an example of a planning condition input screen in the system 1. As shown in FIG. In the example of FIG. 9, there are columns for orders to be targeted for production planning, standard/margin time setting, special margin time setting, accumulation order, and margin time display. Each column will be described in order below. The planning conditions input here can be stored, for example, in a predetermined area of the main storage device. As for the standard/margin time setting, accumulation order, and margin time display columns, in addition to the pattern of specifying for each order as shown in FIG.

Next, the planning condition input unit 350 refers to the order table 363 to acquire the item A001 of the order specified by the code M331, and refers to the production performance table 361 to acquire a record of the production performance specified by the item A001 (S110). Although the example of the actual production table 361 in FIG. 2 shows only the actual production data related to the cutting process of the item A001, in reality, all records including items and processes linked to the order M331 are acquired.

Next, the standard time setting unit calculates an appropriate standard time for each process of each item based on the acquired actual production data corresponding to the order M331, and stores it in the standard time/margin time table 362 (S120).

Here, a method for setting the standard time in this embodiment will be described. FIG. 10 shows an example of a working time histogram obtained for the cutting process of item A001 included in the actual production table 362. As shown in FIG. A work time histogram is a chart that represents the number of times (frequency) of work times performed in the past for a specific process of a specific item for each predetermined work time width. FIG. 10 shows how the work time required for the cutting process for item A001 is distributed by a curve, showing a first peak having the highest first peak and a second peak having a second peak as a local maximum value at a location where the work time is longer but lower than the first peak. In the first peak, the frequency of working hours is recorded so as to form a substantially normal distribution centering on the first peak that gives the mode of the actual working hours related to this cutting process. On the other hand, the second peak is formed in a region away from the first peak and having a long working time. This is considered to be a set of extended working hours due to special circumstances different from fluctuations in working hours under normal working conditions.

From the example of the working time histogram in FIG. 10 described above, for example, the standard time for the cutting process of item A001 can be obtained as the mode value of the actual working time that forms the first peak. In addition, as a method of obtaining the standard time, calculating the median value in the histogram of FIG. 11 and using it as the standard time, using the standard deviation σ obtained in the histogram of FIG. The standard time setting method can be input from the planning condition input screen of FIG. Note that the standard time calculation method is not limited to these. The standard time calculated in this manner is recorded in the standard time/margin time table 362 for each item and process.

Returning to the production planning process flow example of FIG. 8, next, the planning condition input unit 350 refers to the input contents of the input device 400 to determine whether special conditions have been input for production planning. Here, special conditions include, but are not limited to, things such as OJT for worker proficiency being implemented in a certain process of a certain item, and prototype processing being implemented in a certain process of a certain item. A special condition regarding this spare time can be input from the drafting condition input screen of FIG. If it is determined that there is no special condition (S130, No), the process proceeds to S140 for setting the spare time.

In S140, the spare time setting unit 320 acquires records corresponding to all items and processes from the actual production table 361 based on the order that is the target of the production plan. From those records, the spare time is calculated for each corresponding item and process and recorded in the standard time/surplus time table 362 .

Here, a method for calculating the surplus time will be described. The spare time is also calculated based on the actual production table 361 used in calculating the standard time. Referring again to the example of the working time histogram in FIG. 10, the spare time can be obtained, for example, by obtaining the average value of the working time and subtracting the calculated standard time from the average value. In addition, as a method for calculating the margin time, another method may be used, such as excluding the 2σ section obtained from the working time histogram of FIG. The margin time setting method can be input from the planning condition input screen of FIG. The calculated margin time is recorded in the standard time/margin time table 362 for each item and process.

On the other hand, if it is determined that a special process is specified in the planning condition input (S130, Yes), the spare time setting unit 320 calculates the spare time in the same manner as in S140, records the calculated spare time in the standard time/surplus time table 362 (S142), and then performs the special spare time setting process (S144). For example, when a special condition such as OJT or prototype processing work is specified for a process of an item as planning condition input (see FIG. 9), the spare time setting unit 320 refers to the special spare time table 366 and obtains the spare time corresponding to the corresponding condition set in advance. 7, for example, if "OJT" is specified in the cutting process of item A001 in the planning input conditions, the spare time setting unit 320 records 40 minutes obtained from the special spare time table 366 in the corresponding part of the standard time/surplus time table 362. The special slack time may be determined in advance with reference to the normal slack time for each specific item and process, but it may be obtained by other methods such as adopting the work time corresponding to the second peak based on the work time histogram illustrated in FIG.

As described above, when the item, the standard time for each process, and the leeway time are set for the order for which production planning is to be done, the process accumulating section 330 then calculates (stacks) the work time on a daily basis for each process of each item (S150). The work time to be accumulated is the sum of the standard time and the margin time set for each process. Hereinafter, this work time is called a work load for each process.

First, the process integration unit 330 expands the process for each order that is the object of production planning. Specifically, the process integration unit 330 refers to the order table 363 to obtain all records including the target order, refers to the standard time/surplus time table 362 to obtain the standard time and the slack time of each process for each item, and sets the sum as the work load of the process. Then, the process accumulator 330 refers to the production process table 364 and accumulates the workload (the sum of the standard time and the spare time) for each process from the work start date in the positive direction of the time axis (forward) according to the process order corresponding to the stored process. At this time, the process accumulating part 330 refers to the production capacity table 365, and when the total accumulation exceeds the production capacity for each process set for the relevant process per day, the excess work load is carried over to the next day and then the accumulation is continued. Although the work load is calculated in the order of delivery date of the order to which the relevant process belongs, it may be calculated in the order of the earliest date (earliest start date) when the work of the relevant process can be performed. This earliest start date is generally the day following the completion date of the immediately preceding step determined by the routing.

Based on the workload consisting of the standard time and spare time accurately calculated for each process in this way, it is possible to formulate a production plan that enables efficient production within the range of daily production capacity.

The above process integration results are output to the output device 50 of the system 1 by the process integration result output unit 340.
0 or output to an external computer via communication device 600 (S160), and the production planning processing flow ends. FIG. 11 shows an example of the process integration result output by the process integration result output section 340 . FIG. 11 shows an example of process integration results graphically output by the system 1 for cutting processes included in a plurality of different orders. The example of FIG. 9 schematically shows the result of integrating the workload for the cutting processes of items A001, A008 and A098 in three orders M331, M335 and M326. As exemplified in the order table 363 of FIG. 4, the three orders are packed in order of delivery date, and the order M326, which exceeds the daily production capacity as a result of integration, is carried over to the next day (indicated by the block arrow in FIG. 11). Depending on the nature of the process, it is possible to shift only the part of the workload that exceeds the production capacity to the next day instead of carrying over the workload that caused the production capacity to exceed the next day. Such processing can be realized by setting a flag indicating that a partial shift (over-day stacking) is possible in the corresponding process in the standard time/margin time table 362 of FIG. 3, for example.

In addition, in the process integration result of FIG. 11, it is also possible to collectively display the spare time of each day from individual workloads. This makes it possible to comprehensively grasp the spare time assigned to each day. The display form of the spare time can be input from the planning condition input screen of FIG.

Further, the process integration result of FIG. 11 can be configured interactively so that by designating a workload that does not require extra time, the extra time can be deleted. This can be realized by setting the slack time to zero in the records of the standard time/slack time table 362 and the special slack time table 366 corresponding to the designated work load. With such a configuration, by eliminating time-consuming work such as OJT during the busy season and assigning the relevant work load to skilled workers, it is possible to realize a production plan with extremely high productivity that does not include spare time.

Moreover, the process integration result of FIG. 11 can also be configured interactively so that a work load is specified and a work time histogram (FIG. 10) for the corresponding combination of item and process is displayed. In this case, while referring to the displayed work time histogram, the work time considering OJT etc. can be designated, and the difference between the work time and the standard time set for the corresponding process can be subtracted from the total surplus time on the same day. As a result, an implementation plan for OJT can be made while considering the entire production plan.

Furthermore, the process integration result in FIG. 11 can be configured interactively so that by designating each workload, the corresponding work experience number of the worker in charge of the workload can be called. The production record table 361 illustrated in FIG. 2 also records the worker who was in charge of each corresponding process. In this case, it is possible to obtain from the production performance table 361 which worker was in charge of the workload specified in the process integration result, and the number of experiences of each worker, and display the result together with the process integration result. With this configuration, it is possible to allocate a highly experienced expert to a specific work load and delete the spare time corresponding to the work load, or conversely assign a less experienced unskilled worker to perform OJT and subtract the OJT time from the total spare time of the day.

There are several variations of the method for the process integration process already described. They are explained below. These variations can be input from the planning condition input screen of FIG.

First, regarding the order of process integration, in addition to the forward method of accumulating along the time axis from the starting date, for example, a backward method of accumulating in the negative direction of the time axis from a specific date before the delivery date may be used.

In addition to accumulating processes in the order of their due dates, it is conceivable to compile processes in order of shortest available time. In this case, work can be performed in order from the one with the shortest spare time, that is, the work with the least variation in the estimated work time. The same effect can be obtained by arranging the processes in order of due date, and giving priority to the process with the shorter margin time for the different processes with the same due date.

The same effect can be obtained by calculating the variance σ ² of the work time histogram when calculating the standard time and accumulating the variances in ascending order of σ ² . The same applies to the combination with order of delivery date.

In addition, it is also possible to integrate the workload so that the sum of the spare time included in the workload accumulated on each day is leveled. Specifically, in this case, first, the surplus time included in the work load over the production planning period for each process is summed up, and the figure obtained by dividing it by the number of days in the planning period is used as a measure of the surplus time per day. Then, in the process of accumulating the work load for each day, the total spare time for each day is adjusted so as to be close to the standard.

As described in detail above, according to the production planning support system of the present embodiment, even when planning production for a wide variety of products, it is possible to efficiently set an appropriate standard time and to set an appropriate spare time for various factors.

The technical scope of the present invention is not limited to the above-described embodiments, and other modifications, applications, and the like are also included within the scope of matters described in the claims.

1 Production planning support system 100 Processor 200 Main storage device 300 Auxiliary storage device 310 Standard time setting unit 320 Surplus time setting unit 330 Process integration unit 340 Process integration result output unit 350 Planning condition input unit 361 Production performance table 362 Standard time/Surplus time table 363 Order table 364 Production process table 365 Production capacity table 366 Special margin time Table 400 Input device 500 Output device 600 Communication device 700 Internal bus

Claims (8)

Consists of a memory and a processor,
a production performance storage unit that records, for each of a plurality of processes included in the production process of an item that constitutes a product, the item and the process, and the work time required for the work performed in the process in association with each other;
a standard time setting unit that acquires a plurality of work times for a predetermined process for a predetermined item from the production performance storage unit, extracts the most frequently used work time from the group of the plurality of work times, and sets the standard time for the process;
a surplus time setting unit that calculates a surplus time to be set for the process by subtracting the standard time from the average value of the work times obtained from the distribution of the work times corresponding to the standard times;
a process accumulating unit that acquires the sum of the standard time set by the standard time setting unit and the slack time calculated by the slack time setting unit as a workload, which is the time allocated to each process, and generates an implementation process for each process of each item by accumulating the work load for each item on a daily basis;
A production planning support system equipped with The process accumulating unit accumulates the workload for each day in order of the delivery date of each of the items;
The production planning support system according to claim 1. The process accumulating unit, when accumulating the workload, accumulates the leeway time included in each of the workloads in ascending order of length.
The production planning support system according to claim 1. The standard time setting unit calculates the variance for each of the work time groups, and the process integration unit integrates the workloads in ascending order of the variance calculated for each of the workloads,
The production planning support system according to claim 1. The process accumulating unit, when accumulating the workload, accumulates such that the margin time included in each of the workloads is leveled over the planned period;
The production planning support system according to claim 1. A process integration result output unit that graphically displays the daily workload integrated by the process integration unit in a column for each day, and the process integration result output unit displays the sum of spare time included in the workload of each day as one area in the column.
The production planning support system according to claim 1. 2. The production planning support system according to claim 1, wherein by designating one of the workloads in the workload of each day integrated by the process integration unit, the process integration unit deletes the margin time set for the workload. An information processing device composed of a memory and a processor,
For each of the multiple processes included in the production process of the items that make up the product, record the item and the process in association with the work time required for the work performed in the process,
Obtaining a plurality of working hours for a predetermined process for a given item from the recorded items and the working hours, extracting the most frequent working hours from the group of the plurality of working hours, and setting the standard time for the process;
calculating a margin time to be set for the process by subtracting the standard time from the average value of the work time obtained from the distribution of the work time corresponding to the standard time;
Obtaining the sum of the set standard time and the calculated surplus time as a workload, which is the time allocated to each process, and accumulating the workload for each item on a daily basis to generate an implementation process for each process of each item;
Production planning support method.

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