JP5666405B2 - Production plan creation method, production plan creation program, and production plan creation device - Google Patents

Description

  The present invention relates to a production plan creation method, a production plan creation program, and a production plan creation apparatus that create orders by assigning loads of a plurality of orders that are production targets to orders with various delivery dates.

  Conventionally, there is a technology for creating a production plan by allocating the load of multiple orders that are production targets to multiple time segments on the time axis divided by a predetermined width between the start and end of the production plan. Has been developed. As a technique for leveling the load allocated to the production plan, loads are temporarily allocated (stacked) to a plurality of time segments divided by a predetermined width. There is a method of reducing the fluctuation of the load for each time segment by sequentially moving a part of the system to adjacent time segments with a low load (climbing) (for example, Patent Document 1). In addition, as a method of allocating the load temporarily, there are a method of allocating on the basis of the delivery date (to a limit time segment in time for the delivery date) and a method of allocating on the basis of the earliest start (to the time segment at which work can be started earliest).

  In a provisional load assignment state, a time segment with a high load and a time segment with a low load are usually mixed. In a time segment with a high load, the process capacity is greatly exceeded, and it is often impossible to execute the produced production plan as it is. Therefore, by using the method as in Patent Document 1, the load is reduced in the time segment with a high load, and the load is increased in the time segment with a low load, so that the process capability can be effectively utilized. It is possible to create a production plan that minimizes delays in delivery within the scope of capacity.

JP 2006-338602 A

However, the conventional technique as shown in Patent Document 1 has the following problems.
-It is necessary to repeatedly execute a search for a time segment with a high load and move a load to an adjacent time segment, and it takes a lot of calculation time until the overall load is finally leveled.
・ As long as the load exceeds the process capability, even if the delivery date is sacrificed, a feasible production plan can be created by breaking down in the future direction of the time axis, but under the conditions that strictly adhere to the delivery date, Load leveling that allows excess of process capability is not possible. This is due to the fact that the prior art does not have a clear landscaping termination condition other than “the load falls below the process capability”. For this reason, it is difficult to formulate a production plan in time for delivery even if a little increase in process capability (for example, overtime or increase in labor (it is better if it is less)). Alternatively, it is not possible to obtain a guide as to how much process capacity enhancement measures can be taken at which time divisions to meet the delivery date. In particular, this problem becomes more difficult when a downtime period is set for facilities such as holidays and maintenance.

  Therefore, the problem to be solved by the present invention is that it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of the process capability in consideration of the downtime and the operation time. A production plan creation method, a production plan creation program, and a production plan creation apparatus are provided.

The production plan creation method according to the present invention allocates loads of a plurality of orders to be produced to a plurality of time segments on a time axis divided by a predetermined width from the start to the end of the production plan. A production plan creation method for creating a production plan, in which the processing executed by the computing unit of the computer includes an order information storage step for registering delivery dates and loads of the plurality of orders as order information, and production in the production plan. An operation schedule information storage step for registering an operation time segment, which is a time segment included in an operable operation time zone excluding a time segment included in a non-operational inactive time zone, as operation schedule information, and the plurality of orders Load that is loaded into the most recent operating time segment before the time segment corresponding to the delivery date of the multiple orders and output as a load accumulation result Based on the loading step and the load accumulation result, the time segment in which the loads are stacked is defined as a load accumulation calculation time segment, and for each load accumulation calculation time segment, the time axis is more in the past direction than the load accumulation calculation time segment. A load accumulation calculation step of accumulating the loads piled up in a time segment and outputting the result as a load accumulation calculation result, and a predetermined load within a predetermined period composed only of the operation time segment based on the load accumulation calculation result A load increase rate calculation step for calculating the load increase rate in the future direction of the time axis per unit time segment in the increase rate calculation period as a load increase rate, and a state in which the start time segment of the load increase rate calculation period is fixed Thus, the load that is updated by changing the width of the load increase rate calculation period in units of time segments within a predetermined period composed only of the operating time segments. In accordance with the update rate calculation period update step and the update of the load increase rate calculation period, the maximum value of the load increase rate and the load increase rate calculation period which is the maximum value are set as the maximum load increase rate and the maximum load increase rate. Maximum load increase rate update step to be updated as a calculation period, and determination of the end of update of the width of the load increase rate calculation period, and load increase rate information for mountain climbing the maximum load increase rate and the maximum load increase rate calculation period And the load increase rate calculation management step for updating the start time section of the load increase rate calculation period, and the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing correspond. A load crushing step of reallocating a load by regarding the maximum load increase rate as a process capability.

The production plan creation program according to the present invention allocates loads of a plurality of orders to be produced to a plurality of time segments on a time axis divided by a predetermined width from the start to the end of the production plan. A production plan creation program for creating a production plan, which is included in an order information storage step for registering the delivery date and load of the plurality of orders as order information, and an inoperable downtime of the production process in the production plan An operation schedule information storage step for registering an operation time segment, which is a time segment included in an operable operation time zone excluding the time segment, as operation schedule information, and corresponding to the delivery times of the plurality of orders with the loads of the plurality of orders A load stacking step in which the load is piled up in the latest operating time segment before the time segment to be output and output as a load stacking result, and the load Based on the stacking result, the time segment in which the loads are stacked is defined as a load accumulation calculation time segment, and the load accumulation calculation time segment is stacked in the time segment in the past direction of the time axis relative to the load accumulation calculation time segment. A unit in a predetermined load increase rate calculation period within a predetermined period composed only of the operating time section based on the load accumulation calculation result and a load accumulation calculation step for accumulating the load and outputting the result as a load accumulation calculation result A load increase rate calculating step for calculating the load accumulation increment in the future direction of the time axis per time segment as a load increase rate, and the load increase rate in a state where the start time segment of the load increase rate calculation period is fixed A load increase rate calculation period update step in which the width of the calculation period is changed and updated in units of time sections within a predetermined period composed only of the operating time sections. In accordance with the update of the load increase rate calculation period, the maximum load update rate and the load increase rate calculation period that becomes the maximum value are updated as the maximum load increase rate and the maximum load increase rate calculation period. An update rate update step, determining the end of update of the width of the load increase rate calculation period, registering the maximum load increase rate and the maximum load increase rate calculation period as load increase rate information for mountain climbing, and the load The load increase rate calculation management step for updating the start time section of the increase rate calculation period, and the corresponding maximum load increase rate in the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing It is regarded as capability, and has a load crushing step for reallocating a load, and is read out by a calculation unit in a computer to execute processing of each step.

The production plan creation device according to the present invention uses a computing unit of a computer to load a plurality of orders that are production targets on a time axis divided by a predetermined width from the start to the end of the production plan. A production planning device that allocates to the time divisions and creates a production plan, the order information storage unit for registering the delivery date and load of the plurality of orders as order information, and the inability to operate the production process in the production plan An operation schedule information storage unit for registering an operation time section that is a time section included in an operable operation time period excluding a time section included in a non-operational stop time period as operation schedule information, and the loads of the plurality of orders A load stacking unit that piles up the latest operating time segment before the time segment corresponding to the delivery date of multiple orders and outputs as a load stacking result, and the load stacking result Based on the load accumulation calculation time division, the load accumulation calculation time division is used as the load accumulation calculation time division, and the load accumulated in the past time division of the time axis is accumulated for each load accumulation calculation time division. Per unit time section in a predetermined load increase rate calculation period within a predetermined period consisting only of the operating time section based on the load accumulation calculation result and the load accumulation calculation result The load increase rate calculation unit for calculating the load accumulation increment in the future direction of the time axis as a load increase rate and the load increase rate calculation period start time section are fixed, and the load increase rate calculation period A load increase rate calculation period update unit that updates the width by changing in units of time segments within a predetermined period configured only by the operating time segment, and the load increase rate calculation period In accordance with the new, the maximum load increase rate update unit that updates the maximum value of the load increase rate and the load increase rate calculation period as the maximum value as the maximum load increase rate and the maximum load increase rate calculation period, and the load Determine the end of the update of the rate of increase rate calculation period, register the maximum load increase rate and the maximum load increase rate calculation period as load increase rate information for mountain climbing, and start time section of the load increase rate calculation period And the load increase rate calculation management unit for updating the load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate is regarded as a process capability, and the load is regenerated. And a load crushing portion to be assigned.

  According to this, the load for each order is first piled up in the limit time interval in time for the delivery date within a predetermined period (excluding the downtime section) configured only with the operation time section preset in the operation schedule information. The Here, the operation time segment means a time segment included in the operation time zone that can be operated excluding the time segment (stop time segment) included in the non-operational stop time zone of the production process in the production plan. . Next, the accumulation of the load piled up based on this load pile result is calculated. A predetermined load increase rate calculation period starting from a predetermined time segment within the predetermined period is given to the load accumulation result. Next, the load increase rate (the load per unit time section in the section) is calculated from the increment of the load accumulation in the load increase rate calculation period within the predetermined period. Further, after fixing the start time segment of the load increase rate calculation period, the end time segment is changed in units of time segments within a predetermined period, and a new load increase rate is calculated. Among these calculated load increase rates, the maximum value and the period for which the maximum value is taken are always maintained, and when the update of the end time section of the load increase rate calculation period is completed, the maximum value and The period is registered as hill-climbing load increase rate information. Then, the hill-climbing load increase rate information is the minimum process capability necessary for an order to be completed during that period in order to comply with the delivery date. Next, after updating the start time section of the load increase rate calculation period and performing the same processing as described above, new load increase rate information for mountain climbing is generated. The calculated load increase rate for each period within the predetermined period is regarded as a process capability for the period within the predetermined period, and the load is reassigned (climbing), and stored and stored as a result of the landslide. As described above, the minimum process capability required to meet the delivery date can be calculated for each period before the hill-climbing operation (= load leveling operation), so it is necessary to repeat the hill-climbing operation as in the conventional method. The load can be leveled at high speed. Furthermore, it is possible to estimate the minimum process capability necessary to strictly observe the delivery date in consideration of the downtime and the operation time. Therefore, it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of the process capability in consideration of the downtime and the operation time. The start time segment and the end time segment of the predetermined period mean the start time segment and the end time segment of the predetermined period, which are configured only by the operation time segment from the start to the end of the production plan. The start time segment and the end time segment of the load increase rate calculation period mean a start time segment and an end time segment of the load increase rate calculation period, which are periods for calculating the load increase rate.

Here, in the production plan creation method and the production plan creation program according to the present invention, the load increase rate calculation period update step further includes whether the end time section of the load increase rate calculation period is the load accumulated calculation time section . If the end time segment of the load increase rate calculation period is the load accumulated calculation time segment, the width of the load increase rate calculation period is updated, while the end time segment of the load increase rate calculation period is If it is not the load accumulation calculation time section, the load increase rate calculation period may not be updated, and the load increase rate calculation period may be further changed in units of time sections .

Further, in the production plan creation device according to the present invention, the load increase rate calculation period update unit further determines whether an end time section of the load increase rate calculation period is the load accumulated calculation time section , and the load If the end time segment of the increase rate calculation period is the load cumulative calculation time segment, the width of the load increase rate calculation period is updated, while the end time segment of the load increase rate calculation period is the load cumulative calculation time segment Otherwise, the load increase rate calculation period may not be updated, and the load increase rate calculation period may be further changed in units of time segments .

  According to this, since the load is not accumulated and the load increase rate does not change on days other than the load accumulation calculation time section, the calculation can be simplified and the calculation can be made more efficient and faster. .

  Further, in the production plan creation method and the production plan creation program according to the present invention, the load increase rate calculation period update step uses the start time segment of a predetermined period constituted only by the operation time segment as an initial value. With the start time segment of the calculation period fixed, the width of the load increase rate calculation period is increased and updated in units of time segments until reaching the end time segment of the predetermined period composed only of the operation time segment, The load increase rate calculation management step determines whether the load increase rate calculation period width is based on whether the end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of the operating time segment. Is updated, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the load increase rate calculation period The start time segment is updated to the next time segment of the maximum load increase rate calculation period in a predetermined period composed only of the operation time segment, and the load collapse step is an end time segment of the maximum load increase rate calculation period Is determined to end registration of the hill-climbing load increase rate information based on whether it is an end time segment of a predetermined period composed only of the operating time segment, and is registered in the hill-climbing load increase rate information. In the maximum load increase rate calculation period, the corresponding maximum load increase rate may be regarded as the process capability and the load may be reassigned.

  In the production plan creation device according to the present invention, the load increase rate calculation period update unit sets a start time segment of the load increase rate calculation period with an initial value of a start time segment of a predetermined period configured only by the operation time segment. In a fixed state, the width of the load increase rate calculation period is updated in increments of time segments until reaching the end time segment of the predetermined period composed only of the operation time segments, and the load increase rate calculation management unit Is determined based on whether or not the end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of the operating time segment, and ends the update of the width of the load increase rate calculation period, The maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start time segment of the load increase rate calculation period is configured only by the operation time segment. Updated to the next time segment of the maximum load increase rate calculation period in a predetermined period, and the load crushing unit is configured to update the predetermined time period in which the end time segment of the maximum load increase rate calculation period is composed only of the operation time segment. Determine the end of registration of the load increase rate information for mountain climbing based on whether it is an end time segment, and in the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding The maximum load increase rate is regarded as the process capability, and the load may be reassigned.

  According to this, the start time segment of the load increase rate calculation period is fixed within a predetermined period, the end time segment is advanced in the future direction, and a new load increase rate is calculated. Can be executed easily. In addition, since the start time segment of the load increase rate calculation period is updated to the next time segment moved in the future direction of the time axis from the maximum load increase rate calculation period within the predetermined period, a newly generated load for mountain climbing Because the maximum load increase rate calculation period registered as the increase rate information and the maximum load increase rate calculation period registered as the hill-climbing load increase rate information are connected in time on the time axis, It is possible to easily and quickly adjust the load over a wide range.

  The production plan creation program according to the present invention can be recorded and distributed on a fixed recording medium such as a removable recording medium or a hard disk, or via a communication network such as the Internet by wired or wireless telecommunication means. It can be distributed.

  The production plan creation method, production plan creation program, and production plan creation apparatus of the present invention comply with the delivery date of the order while allowing a slight excess of the process capability in consideration of the downtime and the operation time. A production plan can be created.

It is a block diagram of a production plan creation device concerning this embodiment. It is the flowchart explaining the procedure of the process of the production plan preparation method which concerns on this embodiment. It is a figure which shows the production process of the order used as the object of the production plan which concerns on a present Example. It is a figure which shows the delivery date and load of the order used as the object of the production plan which concerns on a present Example. It is a figure which shows the load pile result of the production plan which concerns on a present Example. It is a figure which shows the load accumulation calculation result of the production plan which concerns on a present Example. It is a figure which shows the load accumulation calculation result in the operation time zone of the production plan which concerns on a present Example. It is a figure which shows the load increase rate of [period 1] of the production plan which concerns on a present Example. It is a figure which shows the load increase rate of [period 2] of the production plan which concerns on a present Example. It is a figure which shows the load increase rate and load accumulation calculation result of the whole period of the production plan which concerns on a present Example. It is a figure which shows the load increase rate of the whole period of the production plan which concerns on a present Example. It is a figure which shows the landslide result of the production plan which concerns on a present Example. It is a figure which shows the relationship between the leveling result of the production plan which concerns on a present Example, and process capability.

  Hereinafter, a form for carrying out a production plan creation method, a production plan creation program, and a production plan creation apparatus according to the present invention will be described based on a specific example with reference to the drawings.

  In addition, what is demonstrated below is only what was illustrated and does not show the application limit of the production plan creation method, the production plan creation program, and the production plan creation device according to the present invention. That is, the production plan creation method, the production plan creation program, and the production plan creation device according to the present invention are not limited to the following embodiments, and various modifications are possible as long as they are described in the claims. Is.

  In addition, the time division used in the production plan creation method, the production plan creation program, and the production plan creation apparatus according to the present embodiment described below (that is, the time axis divided by a predetermined width from the start to the end of the production plan). As the above-mentioned plurality of consecutive divisions, a day unit may be used, and a unit such as a month, a week, a work, or a time can be used.

  First, the production plan creation apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram of a production plan creation apparatus according to the present embodiment. The production plan creation apparatus 1 includes a calculation unit, a storage unit, an input unit, and an output unit, and is mounted on a computer. Here, each part (calculation part, memory | storage part, input part, and output part) of the production plan preparation apparatus 1 shown by FIG. 1 is comprised by computers, such as a general purpose personal computer. Such a computer stores hardware such as a CPU, ROM, RAM, hard disk, and CD-ROM drive, and the hard disk stores a program (this program is recorded on a removable storage medium). Can be installed on a variety of computers). And the above-mentioned each part is constructed | assembled by combining these hardware and software.

  As shown in FIG. 1, the production plan creation device 1 includes a load pile unit 11, a load accumulation calculation unit 12, a load increase rate calculation unit 13, a load increase rate calculation period update unit 14, and a maximum load increase rate update. Unit 15, load increase rate calculation management unit 16, load crushing unit 17, order information (order information storage unit) 21, load pile result 22, load accumulation calculation result 23, and load increase rate calculation start time It comprises a section 24, operation schedule information 25, load increase rate calculation period 26, maximum load increase rate information 27, landslide load increase rate information 28, and landslide results 29.

  The order information (order information storage unit) 21 is for registering and storing delivery dates and loads of a plurality of orders to be produced from the outside as order information. As the load of each order, weight, quantity, number, time and the like can be used. Here, in the order information storage unit 21, information registered from outside is input from an input unit (keyboard or the like) (not shown) at the start of production plan creation, recorded in a removable storage medium, provided, or wired. Alternatively, it is given via a communication network such as the Internet by wireless electric communication means and stored in a storage device, an auxiliary storage device or the like.

  The operation schedule information 25 is for storing, as operation schedule information, an operation time section that is a time section included in the operation time period based on an operation time period based on an operation time period or a downtime period in the production plan. It is. Here, in the operation schedule information 25, information set in advance is input from an input unit (keyboard or the like) (not shown) at the start of production plan creation, recorded in a removable storage medium, given, or wired or wireless. Or the like via a communication network such as the Internet and stored in a storage device, an auxiliary storage device, or the like.

  The load pile calculation unit 11 loads each order registered in the order information storage unit 21 based on the delivery date of each order registered in the order information storage unit 21 and the operation time zone registered in the operation schedule information 25. Are piled up in the most recent operation time segment before the time segment corresponding to the delivery date of each order (including the time segment corresponding to the delivery date of each order) and output as a load pile result 22. Then, the load pile result 22 is input to the load accumulation calculation unit 12.

  The load accumulation calculation unit 12 calculates the accumulation of the load in the future direction on the time axis based on the load pile result 22 and outputs it as the load accumulation calculation result 23. Specifically, the load accumulation calculation unit 12 uses the load accumulation result 22 as a load accumulation calculation time segment in the time segment in which the load is accumulated, and for each load accumulation calculation time segment, Accumulate loads piled up in the past time segment. Then, the result is output as a load accumulation calculation result 23. In addition, since it is cumulative, the cumulative value increases monotonously with the future direction of the time axis, that is, with the advance of the day. Then, the load accumulation calculation result 23 is input to the load increase rate calculation unit 13.

  The load increase rate calculation start time section 24 is for storing a start time section of a load increase rate calculation period, which is a period in which the load increase rate calculation unit 13 calculates the load increase rate. In the load increase rate calculation start time section 24, a start time section of a predetermined period constituted only by an operation time section preset in the operation schedule information 25 is set as an initial value. Here, the information set in advance as the initial value of the load increase rate calculation start time section 24 is input from an input unit (keyboard or the like) (not shown) or recorded in a removable storage medium at the start of production plan creation. Or provided via a communication network such as the Internet by wired or wireless telecommunication means and stored in a storage device, an auxiliary storage device or the like.

The load increase rate calculation period update unit 14 fixes the width of the load increase rate calculation period (that is, the load increase rate calculation period of the load increase rate calculation period) while the start time section of the load increase rate calculation period is fixed. The width from the start time segment to the end time segment) is changed and updated in units of time segments within a predetermined period composed only of the operation time segments preset in the operation schedule information 25. The updated load increase rate calculation period is output as the load increase rate calculation period 26. Here, 0 (zero) is initially registered as the load increase rate calculation period. That is, in the initial state, the end time segment of the load increase rate calculation period = the start time segment of a predetermined period constituted only by the operation time segment preset in the operation schedule information 25.
Then, the load increase rate calculation period update unit 14 changes the width of the load increase rate calculation period based on the load accumulated calculation time interval, and the end time interval of the load increase rate calculation period is the load accumulated calculation time interval. Judge whether or not. If the end time section of the load increase rate calculation period is the load accumulation calculation time section, the load increase rate calculation period is updated. On the other hand, if the end time section of the load increase rate calculation period is not the load accumulation calculation time section, the load increase rate calculation period is not updated, the load increase rate calculation period is further changed in units of time sections, and the load increases again. It is determined whether the end time section of the rate calculation period is the load accumulated calculation time section. This is because on days other than the load accumulation calculation time section, the load is not accumulated and the load increase rate does not change, so that the calculation can be simplified. This determination need not be made and is not an essential requirement of the present embodiment.
Furthermore, the load increase rate calculation period update unit 14 determines that the “end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25”. If the above is satisfied, the update of the load increase rate calculation period is terminated.

  Based on the load accumulation calculation result 23, the load increase rate calculation unit 13 loads the time axis in the future direction per unit time section in a predetermined period composed only of the operation time section preset in the operation schedule information 25. This is for calculating the cumulative increment as the load increase rate. Specifically, based on the load accumulation calculation result 23, the load accumulation increase in the load increase rate calculation period 26 (corresponding to a predetermined load increase rate calculation period) updated by the load increase rate calculation period update unit 14. Is calculated as the load increase rate. The calculated load increase rate is input to the maximum load increase rate update unit 16.

  The maximum load increase rate update unit 15 is for registering the maximum load increase rate and the maximum load increase rate calculation period in the maximum load increase rate information 27, and the load increase rate calculated by the load increase rate calculating unit 13. And the maximum load increase rate registered in the maximum load increase rate information 27, and the maximum load increase rate registered in the maximum load increase rate information 27 in which the load increase rate calculated by the load increase rate calculating unit 13 is compared. If the increase rate is equal to or greater than the increase rate, the load increase rate and the load increase rate calculation period 26 calculated by the load increase rate calculation unit 13 are set as the maximum load increase rate and the maximum load increase rate calculation period in the maximum load increase rate information 27. It is for renewal registration. The maximum load increase rate information 27 is initially registered as maximum load increase rate = 0 (zero) and maximum load increase rate calculation period = none.

  The load increase rate calculation management unit 16 determines that the load increase rate calculation period update unit 14 has a predetermined period consisting of only an operation time segment in which the end time segment of the load increase rate calculation period is preset in the operation schedule information 25. When the update of the load increase rate calculation period is completed by determining that the condition “end time segment” is satisfied, the information registered in the maximum load increase rate information 27 (the maximum load increase rate and the maximum load) (Increase rate calculation period) is registered as the hill-climbing load increase rate information 28, and the end time segment of the maximum load increase rate calculation period is configured only by the operation time segment preset in the operation schedule information 25. Until the start time segment of the load increase rate calculation registered in the load increase rate calculation start time segment 24 is changed to the operation time segment set in advance in the operation schedule information 25. In is for updating the next time segment of the maximum load increase rate calculation period in a predetermined period constituted. However, the load increase rate calculation management unit 16 is configured by only the operation time interval in which the end time segment of the maximum load increase rate calculation period registered in the maximum load increase rate information 27 is set in advance in the operation schedule information 25. If it is determined that it is the end time segment of the predetermined period, the load increase rate calculation start time segment registered in the load increase rate calculation start time segment 24 is not updated, and the load increase rate load increase rate information 28 is updated. Is output to the load crushing unit 17.

  Based on the hill-climbing load increase rate information 28, the load-climbing unit 17 calculates the corresponding maximum load increase rate for each maximum load increase rate calculation period, and the production capacity of the process in each maximum load increase rate calculation period. By considering it, it is for reassigning the load. Then, the load collapse result obtained by reallocating the load is stored as a collapse result 29. Note that the mountain break result 29 may be output as a calculation result in the production plan creation apparatus 1 to an output unit such as a display or a printer (not shown) via a result output unit (not shown).

Next, the processing procedure of the production plan creation method according to the present embodiment will be described with reference to FIG. FIG. 2 is a flowchart illustrating the processing procedure of the production plan creation method according to the present embodiment.
The process of the production plan creation method according to the present embodiment described below can be read and executed by the CPU as a production plan creation program in the computer as well. Further, the production plan creation program can be installed in storage devices of various computers by recording it in a removable storage medium.

  As shown in FIG. 2, in the computer, as the order information, the order information that is the delivery date and load of the orders to be produced and the operation schedule information that is the operation time division in the production plan are obtained in advance from the input unit. It is input, recorded and given in a removable storage medium, or given via a communication network such as the Internet by wired or wireless telecommunication means, and is registered in the storage unit (STEP 1: order information storage step) Operation schedule information storage step). Note that the details of this step are the same as the description contents of the order information 21 and the operation schedule information 25 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, based on the delivery date and operation time zone of each order registered in STEP 1, the load of each order registered in STEP 1 is piled up in the latest operation time segment before the time segment corresponding to the delivery date of each order. Output as a pile result (STEP 2: load pile step). The details of this step are the same as those described in the load stacking unit 11 and the load stacking result 21 of the production plan creation device 1 described above, and a description thereof will be omitted.

  Next, based on the load accumulation result output in STEP2, the accumulation of loads in the future direction on the time axis is calculated and output as a load accumulation calculation result (STEP3: load accumulation calculation step). Specifically, in the load accumulation result, the time division in which the load was piled up was set as the load accumulation calculation time division, and for each load accumulation calculation time division, the load was accumulated in the time division in the past direction of the time axis rather than the time division. Accumulate the load. Then, the result is output as a load accumulation calculation result. The details of this step are the same as those described in the load accumulation calculation unit 12 and the load accumulation calculation result 23 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, the start time section of the load increase rate calculation period is initialized (STEP 4: load increase rate calculation period update step). Specifically, a start time section of a predetermined period composed only of an operation time section preset in the operation schedule information 25 is set as an initial value. This step is the same as the description of the load increase rate calculation start time section 24 of the production plan creation apparatus 1 described above, and a description thereof is omitted.

  Next, the maximum load increase rate and the maximum load increase rate calculation period, which are maximum load increase rate information, are initialized (STEP 5: maximum load increase rate update step). As initial values, the maximum load increase rate = 0 (zero) and the maximum load increase rate calculation period = none are registered. This step is the same as the description of the maximum load increase rate update unit 15 and the maximum load increase rate information 27 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Then, the width of the load increase rate calculation period that is a period for calculating the load increase rate (that is, the width from the start time segment to the end time segment of the load increase rate calculation period) is initialized (STEP 6: load increase rate calculation period) Update step). 0 (zero) is registered as an initial value. That is, in the initial state, the end time segment of the load increase rate calculation period = the start time segment. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Next, in a state where the start time section of the load increase rate calculation period is fixed, the load increase rate calculation period is set to a load within a predetermined period constituted only by the operation time sections set in advance in the operation schedule information 25. Whether the end time segment of the load increase rate calculation period is a load cumulative calculation time segment within a predetermined period composed only of the operation time segment preset in the operation schedule information 25 in order to change based on the cumulative calculation time segment Judgment is made (STEP 7: load increase rate calculation period update step). If the end time section of the load increase rate calculation period is the load accumulated calculation time section (STEP 7: YES), the load increase rate calculation period is updated and the process proceeds to STEP 8. On the other hand, if the end time section of the load increase rate calculation period is not the load accumulation calculation time section (STEP 7: NO), the load increase rate calculation period is further changed in units of time sections (STEP 12: load increase rate calculation period update step) ) Again, it is determined whether or not the end time section of the load increase rate calculation period is the load accumulation calculation time section (STEP 7). Here, STEP 7 may not be performed, and is not an essential requirement of the present embodiment. When STEP 7 is not performed, the process proceeds from STEP 6 to STEP 8. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  Next, based on the load accumulation calculation result calculated in STEP 3, the load accumulation increment in the load increase rate calculation period updated in STEP 7 is calculated as a load increase rate (STEP 8: load increase rate calculation step). In addition, this step is the same as the description content of the load increase rate calculation part 13 of the production plan preparation apparatus 1 mentioned above, The description is abbreviate | omitted.

  The load increase rate calculated in STEP 8 is registered by comparing the load increase rate calculated in STEP 8 with the maximum load increase rate registered as maximum load increase rate information (STEP 9: maximum load increase rate update step). If it is equal to or greater than the maximum load increase rate registered as the maximum load increase rate information (STEP 9: YES), the load increase rate calculated in STEP 8 and the load increase rate calculation period are set to the maximum load increase rate information of the maximum load increase rate information. The update is registered as the maximum load increase rate calculation period (STEP 10: maximum load increase rate update step), and the process proceeds to STEP 11. If the load increase rate calculated in STEP 8 is not equal to or greater than the maximum load increase rate registered as the registered maximum load increase rate information (STEP 9: NO), the process proceeds to SPTE 11. This step is the same as the description of the maximum load increase rate update unit 16 of the production plan creation device 1 described above, and the description thereof is omitted.

  In STEP 11, it is determined whether or not the condition “the end time section of the load increase rate calculation period is the end time section of a predetermined period composed only of the operation time section preset in the operation schedule information 25” is satisfied (STEP 11: Load increase rate calculation period update step). When the condition “the end time section of the load increase rate calculation period is the end time section of the predetermined period composed only of the operation time sections preset in the operation schedule information 25” is satisfied (STEP 11: YES), the load increase rate The update of the calculation period is ended, and the process proceeds to STEP13. On the other hand, if the condition “the end time section of the load increase rate calculation period is the end time section of a predetermined period composed only of the operation time section preset in the operation schedule information 25” is not satisfied (STEP 11: NO), Return to STEP12. In addition, this step is the same as the description content of the load increase rate calculation period update unit 14 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  In STEP13, information registered as maximum load increase rate information (maximum load increase rate and maximum load increase rate calculation period) is registered as hill-climbing load increase rate information (STEP13: load increase rate calculation management step). This step is the same as the description of the load increase rate calculation management unit 16 of the production plan creation apparatus 1 described above, and the description thereof is omitted.

  Then, it is determined whether or not the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25 (STEP 14: load increase rate calculation management). Step). When it is determined that the end time segment of the maximum load increase rate calculation period is not the end time segment of the predetermined period configured only by the operation time segment preset in the operation schedule information 25 (STEP 14: NO), the load increase rate The calculation start time section is updated to the next time section of the maximum load increase rate calculation period in a predetermined period composed only of the operation time sections set in advance in the operation schedule information 25 (STEP 15: Load increase rate calculation management step) ), Return to STEP5. On the other hand, when it is determined that the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of the operation time segment preset in the operation schedule information 25 (STEP 14: YES), STEP 16 move on. This step is the same as the description of the load increase rate calculation management unit 16 of the production plan creation apparatus 1 described above, and the description thereof is omitted.

  In STEP 16, the maximum load increase rate calculation period is selected based on the hill-climbing load increase rate information (STEP 16: load landslide step), and the maximum load increase rate corresponding to the selected maximum load increase rate calculation period is selected. The load is reassigned by regarding it as the production capacity of the process in the calculated maximum load increase rate calculation period (STEP 17: load crushing step). Then, it is determined whether or not all the maximum load increase rate calculation periods have been selected (STEP 18: load crushing step). When it is determined that all the maximum load increase rate calculation periods have not been selected (STEP 18: NO) Returning to STEP 16, if it is determined that all the maximum load increase rate calculation periods have been selected (STEP 18: YES), the result of load collapse after reallocating the load is stored as the result of the collapse, and a production plan creation method Terminate the process. In addition, this step is the same as the description content of the load crushing unit 17 of the production plan creation apparatus 1 described above, and a description thereof will be omitted.

  As described above, according to the production plan creation device, the production plan creation method, and the production plan creation program of this embodiment, the load for each order is configured only by the operation time section set in advance in the operation schedule information (pause) Within a predetermined period (excluding time divisions), first, the stack is piled up in the limit time section in time for the delivery date. Next, the accumulation of the load piled up based on this load pile result is calculated. A predetermined load increase rate calculation period starting from a predetermined time segment within the predetermined period is given to the load accumulation result. Next, the load increase rate (the load per unit time section in the section) is calculated from the increment of the load accumulation in the load increase rate calculation period within the predetermined period. Further, after fixing the start time segment of the load increase rate calculation period, the end time segment is changed in units of time segments within a predetermined period, and a new load increase rate is calculated. Among these calculated load increase rates, the maximum value and the period for which the maximum value is taken are always maintained, and when the update of the end time section of the load increase rate calculation period is completed, the maximum value and The period is registered as hill-climbing load increase rate information. Then, the hill-climbing load increase rate information is the minimum process capability necessary for an order to be completed during that period in order to comply with the delivery date. Next, after updating the start time section of the load increase rate calculation period and performing the same processing as described above, new load increase rate information for mountain climbing is generated. The calculated load increase rate for each period within the predetermined period is regarded as a process capability for the period within the predetermined period, and the load is reassigned (climbing), and stored and stored as a result of the landslide. As described above, the minimum process capability required to meet the delivery date can be calculated for each period before the hill-climbing operation (= load leveling operation), so it is necessary to repeat the hill-climbing operation as in the conventional method. The load can be leveled at high speed. Furthermore, it is possible to estimate the minimum process capability necessary to strictly observe the delivery date in consideration of the downtime and the operation time. Therefore, it is possible to create a production plan that complies with the delivery date of the order while allowing a slight excess of process capability.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  Next, examples of the production plan creation device, the production plan creation method, and the production plan creation program of this embodiment will be described below.

  As shown in FIG. 3, the production process of an order targeted in the production plan according to the present embodiment has a process of one processing machine and a shipment buffer, and manufactures a product by inputting raw materials in order units. As shown in FIG. 4, in this embodiment, 13 orders of orders 1 to 13 having four delivery dates of April 3, April 6, April 10, and April 13 are provided. On the other hand, the production plan after April 1 shall be performed. Orders 1 to 3 have a delivery date of April 3, orders 4 to 6 have a delivery date of April 6, orders 7 to 10 have a delivery date of April 10, and orders 11 to 13 have The delivery date is April 13th. The weight (load) of each order is 1 ton. Further, in this embodiment, the time division is set to 1 day, and the start time division of the production plan (in this embodiment, the time division is 1 day, which is the start date) is April 1, and the production plan end time. The division (in this embodiment, the time division is 1 day, which is the end date) is April 13. Further, in this embodiment, the delivery date is regarded as a delivery date, and if the manufacturing is completed before the delivery date, the product is shipped on the delivery date.

  This embodiment will be described with reference to FIGS. In the present embodiment, 13 pieces of order information 21 from order 1 to order 13 shown in FIG. 4 are registered (STEP 1). As shown in FIG. 4, there are four types of delivery dates: April 3, April 6, April 10, April 13, and orders 1-3 are delivered on April 3, orders 4- The delivery date of 6 is April 6, the delivery date of orders 7 to 10 is April 10, and the delivery date of orders 11 to 13 is April 13. Further, the load (weight in this embodiment) of each order is 1 ton. Then, as the operation schedule information 25, the operation time segment (in this embodiment, the time segment is 1 day, which is the operation day) and the suspension time segment (in this embodiment, the time segment is 1 day, (Operation calendar) is set (STEP 1). In this embodiment, April 3, April 7, April 9, and April 10 are the rest days.

  Then, the load pile calculation unit 11 piles up the load of each order registered in the order information storage unit 21 into the latest operation time division before the time division corresponding to the delivery date of each order, and outputs it as the load pile result 22. (STEP2). In this embodiment, since the time division is 1 day, the load stacking unit 11 loads the loads of orders 1 to 13 on the most recent day before each delivery date, and the load stacking result 22 is shown in FIG. As shown, April 2: 3 tons, April 6: 3 tons, April 8: 4 tons, April 13: 3 tons.

Next, the load accumulation calculation unit 12 calculates the accumulation of the load in the future direction of the time axis based on the load accumulation result 22, and outputs it as the load accumulation calculation result 23 (STEP 3). In this embodiment, April 2, April 6, 8 April, 13 April load cumulative calculation date (load accumulated computation time division), and as shown in FIG. 6, April 2: 3 tons, April 6: 3 tons + 3 tons = 6 tons, April 8: 3 tons + 3 tons + 4 tons = 10 tons, April 13: 3 tons + 3 tons + 4 tons + 3 tons = 13 tons.

  Then, the load increase rate calculation start time section 24 initializes the start time section of the load increase rate calculation period, which is the period during which the load increase rate calculation unit 13 calculates the load increase rate (sets the start time section of the production plan) (STEP 4). As the initial value of the start time section n of the load increase rate calculation period, the start time section of a predetermined period composed only of the operation time section set in advance in the operation schedule information 25 becomes the initial value. In this embodiment, FIG. As shown in the figure, the predetermined period is April 1st to 2nd, 4th to 6th, 8th, 11th to 13th, and the load increase rate calculation start date (start time segment of the load increase rate calculation period) As an initial value of n, April 1 (n = 1) is set as the initial value of the load increase rate calculation start time section 24.

  Then, the maximum load increase rate update unit 15 initially registers, as the maximum load increase rate information 27, the maximum load increase rate = 0 (zero) and the maximum load increase rate calculation period = none (STEP 5).

Also, the load increase rate calculation period update unit 14 initially registers 0 (zero) as the load increase rate calculation period (STEP 6). In the present embodiment, the load increase rate calculation period update unit 14 sets the width of the load increase rate calculation period to j days within a predetermined period from the load increase rate calculation start date n (that is, the load increase rate calculation start date n). J days within a predetermined period (Dn _{, j} ) is the load increase rate calculation period end date (end time segment of the load increase rate calculation period)), j = 0 (zero) (ie, load (Increase rate calculation end date = load increase rate calculation start date)).

  Next, the load increase rate calculation period update unit 14 fixes the start time segment of the load increase rate calculation period, and the width of the load increase rate calculation period that is a period for calculating the load increase rate (that is, the load increase rate calculation period) In order to update the width of the calculation period from the start time segment to the end time segment) within a predetermined period consisting only of the operation time segment set in advance in the operation schedule information 25 in units of time segment. It is determined whether the end time segment of the increase rate calculation period is a load accumulation calculation time segment (STEP 7). If the end time segment of the load increase rate calculation period is the load accumulation calculation time segment, the load increase rate calculation period is set. Update (STEP 12). In this embodiment, the load increase rate calculation period update unit 14 sets the load increase rate calculation period j to a predetermined period (April 1 to 2nd, every time the load increase rate calculation unit 13 calculates the load increase rate. 4 days to 6 days, 8 days, 11 days to 13 days), from the load increase rate calculation start date n to the next load accumulation calculation date in the future direction of the time axis, increasing by one day as a time division unit Let me update. Then, it is determined whether or not the end date (n + j day) of the load increase rate calculation period is the load accumulation calculation date (the delivery date when the load is piled up). Here, first, the load accumulation rate calculation start date n = 1 (April 1) is fixed, the first cumulative calculation date is April 2, and j = 1 (April 1 1 To update the load increase rate calculation period.

Then, based on the load accumulation calculation result 23, the load increase rate calculation unit 13 calculates the load increase in the load increase rate calculation period 26 updated by the load increase rate calculation period update unit 14 as the load increase rate (STEP 8 ). In the present embodiment, the load increase rate Δ _{n, j} which is the load increase rate in the load increase rate calculation period j days ahead of the load increase rate calculation start date n is calculated. First, the initial value input from the load increase rate calculation period 26 is the load increase during the load increase rate calculation period from the load increase rate calculation start date April 1 to 1 day ahead (n = 1, j = 1). The load increase rate during the load increase rate calculation period is 3 tons and the load increase rate calculation period is 3 days. _Therefore , the load increase rate Δ _1,1 = 3 Ton / 2 days = 1.5 [ton / day].
Here, the load increase rate is calculated as follows. The n-th day is the start date of the load increase rate calculation period, and the D _{n, j} day is the end date of the load increase rate calculation period.
Δ _{n, j} = (D _n, cumulative load until day _j ends−accumulated load until day _n starts) / (j + 1)

Next, the maximum load increase rate update unit 15 compares the load increase rate calculated by the load increase rate calculation unit 13 with the maximum load increase rate registered in the maximum load increase rate information 27 to calculate the load increase rate. If the load increase rate calculated by the unit 13 is equal to or greater than the maximum load increase rate registered in the registered maximum load increase rate information 27, the load increase rate calculated by the load increase rate calculating unit 13 and the load increase rate calculation The period 26 is updated and registered in the maximum load increase rate information 27 as the maximum load increase rate and the maximum load increase rate calculation period (STEP 9). In the present embodiment, the load increase rate Δn _{, j} calculated in STEP 8 is compared with the maximum load increase rate. Here, since the calculated load increase rate Δn _{, j} is 1.5 [ton / day] and the registered maximum load increase rate is 0 (zero), the maximum load increase rate information is represented as the maximum load. Increase rate = 1.5 [ton / day], maximum load increase rate calculation period = load increase rate calculation start date April 1 to one day ahead within a predetermined period (n = 1, j = 1), that is, The update is registered as the end date m = n + j = 2 (April 2) of the maximum load increase rate calculation period.

  Then, the load increase rate calculation period update unit 14 determines that the “end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25”. Is determined (STEP 11). When any one of the conditions is satisfied (STEP 11: YES), the load increase rate calculation period update unit 14 ends the update of the load increase rate calculation period, and proceeds to STEP 13. In this embodiment, since the condition is not satisfied in the state of n = 1 and j = 1 (STEP 11: NO), the load increase rate calculation period update unit 14 updates the load increase rate calculation period, and the load increase rate In the state where the calculation start date n = 1, j is increased by one day (j = 3) within a predetermined period, and the process returns to STEP7.

As described above, in this embodiment, with the load increase rate calculation start date n = 1, “the end time segment of the load increase rate calculation period is configured only by the operation time segment preset in the operation schedule information 25. Load increase rate calculation start date n until j = 8 (April 13th 8th ahead of April 1 in the predetermined period = the end date of the predetermined period) The processing from STEP7 to STEP12 is repeated in the load increase rate calculation period between the current date and the load accumulation calculation date. In this process, j = 4 (April 6), j = 5 (April 8), j = 8 (April 13), and the load increase rate Δ _{n, j} by the load increase rate calculator 13 is Calculated as follows:
Δ _1,4 = _6/5 [ton / day] (6 tons for 5 days working day)
Δ _1,5 = _10/6 = _5/3 [ton / day] (10 tons on 6 days working days)
Δ _1,8 = _13/9 [ton / day] (13 tons for 9 days of operation)

Then, in the state of the load increase rate calculation start date n = 1, at j = 5 (April 8), the load increase rate Δ _1,5 = _5/3 [ton / day of the calculated load increase rate calculation period] ] Is the largest, the information registered in the maximum load increase rate information 27 by the maximum load increase rate update unit 15 is as follows.
Maximum load increase rate = 5/3 [ton / day]
Maximum load increase rate calculation period = From the first day of load increase rate calculation from April 1 to April 8 (n = 1, j = 5) within the predetermined period, that is, the maximum load increase rate calculation period End date m = n + j = 5 (April 8)

Next, the load increase rate calculation period update unit 14 “the end time segment of the load increase rate calculation period is an end time segment of a predetermined period constituted only by an operation time segment preset in the operation schedule information 25” If it is determined that the condition is satisfied (STEP 11: YES), the update of the load increase rate calculation period is terminated, the process proceeds to STEP 13, and the load increase rate calculation management unit 16 is registered in the maximum load increase rate information 27. Information (maximum load increase rate and maximum load increase rate calculation period) is registered as the hill-climbing load increase rate information 28 (STEP 13). In this example,
[Period 1]
Start date of maximum load increase rate calculation period (n) = 1 (April 1)
End date of maximum load increase rate calculation period (m) = 8 (April 8)
Maximum load increase rate = 5/3 [ton / day] (working day basis)
It becomes. FIG. 8 shows an image of the hill-climbing load increase rate in [period 1] registered as the hill-climbing load increase rate information 28. In FIG. 8, from April 1 to April 8 within a predetermined period, a cumulative load line (thick straight line) leveled to a production rate of 5/3 [ton / day] is drawn. During this period, production at a higher pace will not contribute to delivery deadlines and increase inventory and inventory periods. On the other hand, it can be seen that if production is performed at a lower pace, a delay in delivery occurs.

  Further, the load increase rate calculation management unit 16 determines whether the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25. (STEP 14). When the load increase rate calculation management unit 16 determines that the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25 (STEP 14). : YES), the registration of the hill-climbing load increase rate information 28 is terminated, and the load-climbing by the load-climbing unit 17 is performed (STEP 16). When the load increase rate calculation management unit 16 determines that the maximum end time segment of the load increase rate calculation period is not an end time segment of a predetermined period composed only of an operation time segment preset in the operation schedule information 25 (STEP 14: NO), the load increase rate calculation start time segment registered in the load increase rate calculation start time segment 24 is the maximum load increase within a predetermined period consisting only of the operation time segment preset in the operation schedule information 25 Update to the next time segment of the rate calculation period (STEP 15). In this embodiment, the load increase rate calculation management unit 16 determines that the end m = 8 (April 8) of the maximum load increase rate calculation period is not the end date (April 13) of the predetermined period (STEP 14). : NO), the maximum load increase registered as the hill-climbing load increase rate information 28 in a predetermined period in which the start date n of the load increase rate calculation period is constituted only by the operation time section preset in the operation schedule information 25 Replace with the day after the end date m of the rate calculation period (assuming n = 11). Here, it is updated to n = 11 (April 11). And it returns to STEP5.

Next, in the present embodiment, the processing from STEP5 to STEP15 is executed in the state where the start date n = 11 of the load increase rate calculation period. The load accumulation calculation date in this process is April 13 (j = 2), and the load increase rate Δ _{n, j} during this load increase rate calculation period is calculated by the load increase rate calculation unit 13 as follows. The
Δ _11,2 = _3/3 = 1 [ton / day] (3 tons in 3 days)

Since there is no other load accumulation calculation date, the information registered in the maximum load increase rate information 27 by the maximum load increase rate update unit 15 in the state of the load increase rate calculation start date n = 11 is as follows.
Maximum load increase rate = 1 [ton / day]
Maximum load increase rate calculation period = From the load increase rate calculation start date April 11 to April 13 which is two days ahead within the predetermined period (n = 11, j = 2), that is, the maximum load increase rate calculation period End date m = n + j = 13 (April 13th)

Then, the information registered as the landslide load increase rate information 28 by the load landscaping unit 17 is:
[Period 2]
Start date of maximum load increase rate calculation period (n) = 11 (April 11)
End date of maximum load increase rate calculation period (m) = 13 (April 13)
Maximum load increase rate = 1 [ton / day]
It becomes. FIG. 9 shows an image of the hill-climbing load increase rate in [period 2] registered as the hill-climbing load increase rate information 28. In FIG. 8, a cumulative load line (thick straight line) is drawn from April 11 to April 13 at a production rate of 1 [ton / day].

  At this stage, the load increase rate calculation management unit 16 determines that the end date m = 13 (April 13) of the maximum load increase rate calculation period is the end date (April 13) of the predetermined period (STEP 14). : YES), the registration of the mountain climbing load increase rate information 28 is terminated. The results are shown in FIG. 10 and FIG. In FIG. 10, the load increase rate for mountain climbing is shown over the entire production plan including a stop day on the operating day.

As shown in FIG. 11, since the calculated [Period 1] is divided into three sections depending on the suspension date, [Period 1] is divided into four sections (1-1, 1-2, 1-3). ) Are displayed separately. For each section, the load crushing unit 17 reallocates the load by regarding the load increase rate as the production capacity of the process (STEPs 16 to 18). FIG. 12 shows the result of reassigning the load. From FIG. 12, for example, the following can be understood.
● In section 1-1 (April 1 to 3) of [Period 1], 5/3 [ton / day] is used as the production capacity, and the partial load of order 1 to order 3 and order 4 is evenly distributed. Assigned. Here, since the delivery date of order 1 to order 3 is April 3, and the delivery date of order 4 is April 6, there is no delay in delivery date.
● In section 1-2 (April 4th to 6th) of [Period 1], the remaining capacity of order 4, one of order 5 to order 8, and one of order 9 with 5/3 [ton / day] as production capacity The load on the part is evenly allocated. Here, since the delivery date of order 4 to order 6 is April 6, and the delivery date of order 7 to order 9 is April 10, there is no delay in delivery date.
In Section 1-3 (April 8) of [Period 1], the remainder of Order 9 and the load of Order 10 are equally allocated with 5/3 [ton / day] as production capacity. Here, since the delivery date of order 9 and order 10 is April 10, there is no delay in delivery date.
● In [Period 2], the load from order 11 to order 13 is evenly allocated with 1 [ton / day] as the production capacity. Here, since the delivery date of order 11 to order 13 is April 13, there is no delay in delivery date.

  As described above, it can be seen from the present embodiment that the landslide for leveling the load as much as possible can be executed quickly and easily without repeating the selection and movement of the load while complying with the delivery date. Moreover, as shown in FIG. 13, the minimum capability improvement rate and period required in order to observe a delivery date can be confirmed easily. In this embodiment, assuming that the standard capacity is 4/3 ton / day, it is necessary to improve the capacity by 5/4 times from April 1 to April 8 (for example, increase in the number of employees and overtime work). I understand.

  Therefore, in the production plan creation device, the production plan creation method, and the production plan creation program of this embodiment, the delivery date of the order is allowed while allowing some excess of the process capability in consideration of the downtime and the operation time zone. It can be seen that a production plan that complies with the above can be created.

DESCRIPTION OF SYMBOLS 1 Production plan preparation apparatus 11 Load pile part 12 Load accumulation calculation part 13 Load increase rate calculation part 14 Load increase rate calculation period update part 15 Maximum load increase rate update part 16 Load increase rate calculation management part 17 Load load break part 21 Order information (Order information storage)
22 Load accumulation result 23 Load accumulation calculation result 24 Load increase rate calculation start time section 25 Operation schedule information (operation schedule information storage unit)
26 Load increase rate calculation period 27 Maximum load increase rate information 28 Mountain load load increase rate information 29 Mountain collapse result STEP 1 Order information storage step, operation plan information storage step STEP 2 Load pile step STEP 3 Load accumulation calculation steps STEP 1, 4, 6, 7, 11, 12 Load increase rate calculation period update step STEP8 Load increase rate calculation step STEP5, 9, 10 Maximum load increase rate update step STEP13-15 Load increase rate calculation management step STEP16-18 Load crushing step

Claims (9)

A production plan creation method that creates a production plan by allocating the loads of multiple orders that are production targets to multiple time segments on the time axis that are separated by a predetermined width from the start to the end of the production plan. Because
The processing executed by the computing unit of the computer is
An order information storage step of registering delivery times and loads of the plurality of orders as order information;
An operation schedule information storage step for registering, as operation schedule information , an operation time segment that is a time segment included in an operation time zone that can be operated excluding a time segment included in a non-operational stop time zone of the production process in the production plan; ,
A load stacking step of stacking the loads of the plurality of orders in the most recent operation time section before the time section corresponding to the delivery date of the plurality of orders, and outputting as a load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. Load accumulation calculation step of accumulating the load and outputting as a load accumulation calculation result;
Based on the load accumulation calculation result, the load accumulation increment in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period within a predetermined period constituted only by the operation time section is increased. Load increase rate calculation step to calculate as a rate,
A load that is updated by changing the width of the load increase rate calculation period in units of time intervals within a predetermined period composed only of the operation time interval with the start time interval of the load increase rate calculation period fixed. An increase rate calculation period update step,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update step,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period Load increase rate calculation management step to update the time division,
In the maximum load increase rate calculation period registered in the load increase rate information for the mountain break, the load load break step for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation method characterized by comprising: The load increase rate calculation period update step further includes:
If the load completion time segment of the increase rate calculation period is determined whether the load accumulated computation time segment, the end epoch the load accumulated computation time segment of the load increase rate calculation period, the load increase rate computation If the end time section of the load increase rate calculation period is not the load accumulated calculation time section, the load increase rate calculation period is not updated and the load increase rate calculation period is changed. The production plan creation method according to claim 1, further comprising changing the time unit . The load increase rate calculation period updating step calculates the load increase rate in a state where the start time segment of the load increase rate calculation period is fixed with an initial value of a start time segment of a predetermined period constituted only by the operation time segment. The period width is updated by increments of time segments until reaching the end time segment of the predetermined period consisting only of the operating time segments,
The load increase rate calculation management step determines whether the load increase rate calculation period width is based on whether the end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of the operating time segment. Update end, and register the maximum load increase rate and the maximum load increase rate calculation period as the load increase rate information for mountain break, and the start time segment of the load increase rate calculation period is only the operation time segment Updated to the next time segment of the maximum load increase rate calculation period in a predetermined period consisting of:
The load landslide step is based on whether or not the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of the operation time segment. Judging the end of registration, in the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate is regarded as a process capability, and the load is reassigned The production plan creation method according to claim 1 or 2. A production plan creation program that allocates the load of multiple orders that are production targets to multiple time segments on the time axis that are separated by a predetermined width from the start to the end of the production plan, and creates a production plan Because
An order information storage step of registering delivery times and loads of the plurality of orders as order information;
An operation schedule information storage step for registering, as operation schedule information , an operation time segment that is a time segment included in an operation time zone that can be operated excluding a time segment included in a non-operational stop time zone of the production process in the production plan; ,
A load stacking step of stacking the loads of the plurality of orders in the most recent operation time section before the time section corresponding to the delivery date of the plurality of orders, and outputting as a load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. Load accumulation calculation step of accumulating the load and outputting as a load accumulation calculation result;
Based on the load accumulation calculation result, the load accumulation increment in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period within a predetermined period constituted only by the operation time section is increased. Load increase rate calculation step to calculate as a rate,
A load that is updated by changing the width of the load increase rate calculation period in units of time intervals within a predetermined period composed only of the operation time interval with the start time interval of the load increase rate calculation period fixed. An increase rate calculation period update step,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update step,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period Load increase rate calculation management step to update the time division,
In the maximum load increase rate calculation period registered in the load increase rate information for the mountain break, the load load break step for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation program characterized by having a computer read out by a calculation unit and executing processing of each step. The load increase rate calculation period update step further includes:
If the load completion time segment of the increase rate calculation period is determined whether the load accumulated computation time segment, the end epoch the load accumulated computation time segment of the load increase rate calculation period, the load increase rate computation If the end time section of the load increase rate calculation period is not the load accumulated calculation time section, the load increase rate calculation period is not updated and the load increase rate calculation period is changed. 5. The production plan creation program according to claim 4, wherein the production plan creation program is further changed in units of time segments . The load increase rate calculation period updating step calculates the load increase rate in a state where the start time segment of the load increase rate calculation period is fixed with an initial value of a start time segment of a predetermined period constituted only by the operation time segment. The period width is updated by increments of time segments until reaching the end time segment of the predetermined period consisting only of the operating time segments,
The load increase rate calculation management step determines whether the load increase rate calculation period width is based on whether the end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of the operating time segment. Update end, and register the maximum load increase rate and the maximum load increase rate calculation period as the load increase rate information for mountain break, and the start time segment of the load increase rate calculation period is only the operation time segment Updated to the next time segment of the maximum load increase rate calculation period in a predetermined period consisting of:
The load landslide step is based on whether or not the end time segment of the maximum load increase rate calculation period is an end time segment of a predetermined period composed only of the operation time segment. Judging the end of registration, in the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate is regarded as a process capability, and the load is reassigned The production plan creation program according to claim 4 or 5. Using the computing unit of the computer, the load of multiple orders to be produced is assigned to multiple time segments on the time axis divided by a predetermined width from the start to the end of the production plan. A production planning device for creating a plan,
An order information storage unit for registering delivery times and loads of the plurality of orders as order information;
An operation schedule information storage unit for registering, as operation schedule information , an operation time segment that is a time segment included in an operation time zone that can be operated excluding a time segment included in a non-operational stop time zone of the production process in the production plan; ,
A load stacking unit that stacks the loads of the plurality of orders in the most recent operation time section before the time section corresponding to the delivery date of the plurality of orders, and outputs the load stacking result;
Based on the load pile result, the load accumulation calculation time division is defined as the load accumulation calculation time division, and the load accumulation calculation time division for each load accumulation calculation time division is accumulated in the time division in the past direction of the time axis. A load accumulation calculation unit for accumulating the load and outputting as a load accumulation calculation result;
Based on the load accumulation calculation result, the load accumulation increment in the future direction of the time axis per unit time section in a predetermined load increase rate calculation period within a predetermined period constituted only by the operation time section is increased. A load increase rate calculation unit to calculate as a rate,
A load that is updated by changing the width of the load increase rate calculation period in units of time intervals within a predetermined period composed only of the operation time interval with the start time interval of the load increase rate calculation period fixed. An increase rate calculation period update section,
Along with the update of the load increase rate calculation period, the maximum load increase that updates the maximum value of the load increase rate and the load increase rate calculation period that is the maximum value as the maximum load increase rate and the maximum load increase rate calculation period. Rate update department,
The end of the update of the width of the load increase rate calculation period is determined, and the maximum load increase rate and the maximum load increase rate calculation period are registered as load increase rate information for mountain climbing, and the start of the load increase rate calculation period A load increase rate calculation management section for updating the time segment;
In the maximum load increase rate calculation period registered in the load increase rate information for mountain break, the load load break portion for reallocating the load, considering the corresponding maximum load increase rate as a process capability,
A production plan creation device characterized by comprising: The load increase rate calculation period update unit further includes:
The width of the load increase rate calculation period, it is determined whether the end time segment is the load accumulated computation time segment, if termination epoch the load accumulated computation time segment of the load increase rate calculation period, the load The width of the increase rate calculation period is updated. On the other hand, if the end time segment of the load increase rate calculation period is not the load accumulation calculation time segment, the load increase rate calculation period is not updated and the load increase rate is not updated. 8. The production plan creation apparatus according to claim 7, wherein the calculation period is further changed in units of time segments . The load increase rate calculation period update unit calculates the load increase rate in a state where the start time segment of the load increase rate calculation period is fixed with an initial value of a start time segment of a predetermined period configured only by the operation time segment. The period width is updated by increments of time segments until reaching the end time segment of the predetermined period consisting only of the operating time segments,
The load increase rate calculation management unit determines whether the load increase rate calculation period width is based on whether the end time segment of the load increase rate calculation period is an end time segment of a predetermined period composed only of the operating time segment. Update end, and register the maximum load increase rate and the maximum load increase rate calculation period as the load increase rate information for mountain break, and the start time segment of the load increase rate calculation period is only the operation time segment Updated to the next time segment of the maximum load increase rate calculation period in a predetermined period consisting of:
The load leveling unit determines whether the maximum load increase rate calculation period end time segment is an end time segment of a predetermined period composed only of the operation time segment, and Judging the end of registration, in the maximum load increase rate calculation period registered in the load increase rate information for mountain climbing, the corresponding maximum load increase rate is regarded as a process capability, and the load is reassigned The production plan creation device according to claim 7 or 8.