JP3479198B2 - Production process simulation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production process simulation device, and more particularly, to a production process simulation device capable of appropriately and automatically performing lot aggregation that matches processing conditions and lot aggregation conditions.

[0002]

2. Description of the Related Art In recent years, in a production line for producing a wide variety of products in parallel, the processing conditions for producing products generally differ depending on the equipment and the production process. It is rare to continue processing with. When processing conditions change in the same equipment, it is generally necessary to perform a setup change work, but a complicated setup change work not only increases the burden on the operator but also significantly reduces the equipment efficiency. For this reason, in a manufacturing line that handles a wide variety of products, by grouping multiple processing steps with the same processing conditions for each process / equipment, and then processing these continuously,
Lot consolidation is being implemented to reduce setup change work. As a technique relating to a simulation device for virtually executing a production schedule of a production line for producing such a variety of products in parallel and extracting a more appropriate schedule, for example, Japanese Patent Publication No. 7-109601 is disclosed. The techniques described are known. In the technique described in the above-mentioned publicly known document, a simulation executor determines in advance whether lots can be integrated for each product type and process or whether integrated lots need to be divided again. By specifying based on the production plan, some individual lots are aggregated and processed in one process, and the aggregated lots that have been combined once are subdivided into individual lots in other processes, and individual lot units are processed. This concept incorporates the concept of lot division / integration, which occurs in an actual production line, such as processing in a production schedule, into a simulation when creating a production schedule.

[0003]

However, in the technique described in the above-mentioned publicly known document, since a person judges the possibility of lot integration in advance and stores the possibility, lots of human beings are required for every process. It was necessary to intervene and make decisions, and extremely complicated processing was required. In addition, regarding the processing order of the products in the integrated lot, only a small amount of information such as the product introduction date is taken into consideration. For example, a detailed processing order based on product attributes such as thickness and width is used. The settings could not be made. In order to solve the problems in the conventional technology, the present invention improves the production process simulation device to automatically perform accurate lot aggregation according to the processing conditions and lot aggregation conditions, and at the same time, to set the product attributes. Accordingly, it is an object of the present invention to provide a production process simulation device capable of setting the processing order of products in the integrated lot.

[0004]

In order to achieve the above-mentioned object, the present invention uses a facility to be used for production of a product and a facility to be selected from process data that is determined for each process, and to perform lot aggregation. In a production process simulation device that aggregates multiple lots of products of processes that have the same processing condition that is the condition of equipment and virtually executes a production schedule using the products in which the lots are aggregated, use the above for each product type A process data registration unit that registers the above process data including the equipment and the above processing conditions, a lot aggregation condition registration unit that registers the lot aggregation condition that is the condition on the product side for performing lot aggregation under a certain condition, and a wait A process queue creating unit that creates a process queue in which the processes in a state are arranged in a predetermined order according to the equipment used and the processing conditions, and the created process queue. A processing queue storage unit for storing, a lot aggregation unit that creates a plurality of aggregation lots that can start aggregation processing according to the lot aggregation conditions from the processing queue, and an aggregation lot group aggregated by the lot aggregation unit. An aggregated lot for storing, and an aggregated lot to be processed for each facility from the aggregated lot group stored in the aggregated lot storage based on a predetermined rule. It is configured as a production process simulation device characterized by comprising a selection unit. As described above, since the lot aggregation condition can be set for each processing condition, it is possible to automatically perform the optimum lot aggregation that matches the processing condition and the lot aggregation condition. Further, a virtual execution unit for virtually executing the aggregated lot group is provided, and the processed lot is deleted according to the elapsed time of the virtual execution, and the waiting state among the processes of the equipment used for the completed lot is deleted. If a lot of processes in (1) are aggregated and stored in the aggregated lot storage section, a continuous lot aggregation simulation can be performed in time, and a production schedule can be created in accordance with the actual production state. Becomes Further, for example, if the above-mentioned predetermined rule is set so as to select the above-mentioned aggregated lot in which the setup change time in each of the above facilities is selected, lots can be aggregated with respect to work efficiency. Further, the predetermined order may be determined based on, for example, the length of waiting time of the product in the waiting state and / or the attribute of the product. In this case, for each lot aggregation condition, the above predetermined order is determined based on the length of the waiting time of the product or based on the attributes such as the thickness and the width of the product. The processing order of the products can be determined in detail and automatically. Furthermore, if the process data registered in the process data registration section includes a plurality of processing conditions that are alternative to each process, products that have a certain degree of freedom in processing conditions will be mixed for a certain facility. You can create production schedules for complex production lines.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The following embodiments are specific embodiments of the present invention and are not of the nature to limit the technical scope of the present invention. 1 is a functional block diagram showing a schematic configuration of a production process simulation device 0 according to an embodiment of the present invention, FIG. 2 is a flowchart diagram showing an operation procedure of the production process simulation device 0, and FIG. FIG. 4 is a diagram showing process data related to the production process simulation device 0.
Is a chart showing lot aggregation conditions by equipment and processing conditions, FIG. 5 is a chart showing setup change times with respect to processing conditions before and after each equipment according to the production process simulation apparatus 0, and FIG. FIG. 7 is a diagram showing an example of an in-process product group, FIG. 7 is a diagram showing an example of a processing queue for each processing condition at the start of simulation, and FIG.
10 is a chart showing the selection state of the aggregated lot, FIG. 9 is a chart showing the processing order of the products in the selected aggregated lot, and FIG.
Is a diagram showing the aggregated lot allocation result of the production process simulation device 0, FIG. 11 is a diagram showing an example of the updated in-process process group, and FIG. 12 is a process queue for each process condition in the next simulation. The chart shown in Fig. 13 is
It is a figure which shows the example of allocation of the intensive lot after the simulation time update of the production process simulation apparatus 0. As shown in FIG. 1, the production process simulation apparatus 0 according to the present embodiment is, for example, a physical distribution simulation apparatus in a metal rolling mill, and includes a process data registration unit 1, a lot aggregation condition registration unit 2, and a setup change time registration unit. 3, previous processing condition storage unit 4, processing queue storage unit 5, lot aggregation unit 6, aggregated lot storage unit 7, setup change time determination unit 8,
The processing order setting unit 9, the virtual execution unit 10, the work-in-progress process updating unit (corresponding to the replenishing means) 11, and the simulation start time updating unit 12 are included.

The details of the operation of the production process simulation apparatus 0 according to the embodiment of the present invention will be described below. As shown in FIG. 2, in the production process simulation apparatus 0, process data, lot aggregation conditions, and setup change time are registered in advance (S1). Here, the process data defines processing conditions in each facility on the production line, product attributes such as plate thickness and plate width, and processing time for each product type and process.
Be registered with. FIG. 3 is an example of the process data. In the example shown in FIG. 3, there are three types of products, A, B, and C, and the passing process, that is, the equipment used and the order in which they are used, differ depending on each type. The equipment used is shared by the above-mentioned three types, and is composed of a rolling mill, an annealing equipment (batch processing, continuous processing), a slitter (width dividing machine), a surface treatment equipment and a packing machine. The treatment conditions are, for example, the surface shape of the rolling roll (roll type R ₁ ,
R ₂ ), the width of the tool (1250 mm,
900 mm), in the annealing equipment, the ambient temperature in the furnace (2
00 degrees, 300 degrees), and in the case of surface treatment equipment, the usage conditions of each equipment are shown such as the type of paint (P ₁ , P ₂ ). It should be noted that the processing conditions are not specified for the packing machine that processes each product without lot consolidation. Further, in the process 1 of the product type A shown in FIG. 3, for example, two types of roll type R ₁ and roll type R ₂ are registered in the processing conditions. This indicates that in the process 1 of the type A, rolling is performed by using either the roll type R ₁ or the roll type R ₂ . Further, the processing times of 15 minutes and 20 minutes respectively indicate that the processing time differs depending on the roll used. Similarly, in process 4 of product type B, roll type R ₁
Or R ₂ can be used, and process 6 of product B
, The annealing time is different, the annealing temperature is 200 degrees,
Alternatively, it can be set to any of 300 degrees. In this way, the processing conditions depend on the product type (A,
Even if B and C) are different, if the processing conditions are the same, it means that lot aggregation is possible, and this is a facility condition for performing lot aggregation.

The above-mentioned lot aggregation condition is a condition on the product side when performing lot aggregation under a certain processing condition in a certain facility, and is registered in the lot aggregation condition registration unit 2.
FIG. 4 shows an example of the lot aggregation condition. In FIG. 4, a processing order key for setting the processing order of products in a lot to be aggregated according to equipment / processing conditions, a minimum number and a maximum number when a lot is aggregated, and a coil to be rolled until the above-mentioned minimum number is obtained, for example. There is a maximum waiting time to wait for the processing steps such as “waiting for work in progress”. Here, the processing order key has a condition name that is a key such as a product attribute included in the process data of FIG. 3 and a code that indicates a sorting direction. For example, a roll type R of a rolling mill is used. _{In 2} , condition name =
It is the "board width" and is indicated by the direction code = "-".
These two designations stipulate that the products of roll type R ₂ are rolled in the order of decreasing strip width, that is, from the widest strip to the narrowest strip. Similarly, in the width-dividing machine, the condition name = “plate thickness” and the direction code = “+” are shown. For the width-dividing machine, process from thin plate thickness to thick plate in order. Is specified.
Incidentally, in the surface treatment equipment, the processing order key is described as “none”, but this means that the processing order is not particularly specified by using the key such as the attribute of the product. In addition, the minimum number in FIG. 4 is the number of coils that are not operated under the processing conditions until at least the specified number of coils are prepared, and the maximum number is the number of coils that can be continuously processed under the same processing conditions. It is the maximum number. In addition, the lot consolidation conditions include exceptional conditions that are performed when the equipment and processing conditions are the same, and when the coils that have passed the maximum waiting time are included, lot consolidation is performed even if the number of coils is less than the minimum number. In addition, Fig. 4 also shows the processing mode for each equipment. The equipment with "single" is one that processes lot-collected coils one by one, and the one with "batch" is multiple coils at the same time. Is a facility that can process Therefore, the above processing sequence keys do not apply to "batch" type equipment. The processing form for each facility is not related to the above lot consolidation. FIG. 5 is a table showing an example of the setup change time for each facility stored in the setup change time registration unit 3. The setup change time is set by a combination of the processing conditions of the previous integrated lot (stored in the previous processing condition storage unit 4) and the processing conditions of the current integrated lot in each facility. Therefore, setup change is not performed within one integrated lot. Therefore, if lots are properly integrated, the setup change time can be shortened. The purpose of this embodiment is to provide a simulation apparatus that enables lot consolidation that minimizes such setup change time. In addition, here, the setup time of 10 minutes is also set for the packing machine that does not perform lot consolidation, but this indicates that a setup time of 10 minutes is required every time one lot is processed. ing.

Next, the processing queue in which the in-process processes in the waiting state on the production line are rearranged in consideration of the equipment used and the processing conditions is stored in the processing queue storage unit 5 (S2). In order to create a processing queue, we first store the in-process product group at the start of the simulation. FIG. 6 is an example of an in-process product group. In the in-process product group in FIG. 6, the product type, the in-process process, and the time of arrival at the in-process process are registered. Here, the arrival time is expressed as a relative time with the simulation start time being 0. Based on the product type and process of each product shown in this work-in-progress product group, the facility used and the process condition are referred to from the process data in FIG. 3, and the process number is registered in the process queue storage unit 5. In order to facilitate understanding of FIG. 6, the equipment used and the processing conditions are shown in the two columns on the right side. In this case, under the same processing conditions, registration is performed in the order of arrival time (longest waiting time). In this embodiment, an appropriate schedule is extracted for the products that have arrived at each process by simply inputting the arrival time, the equipment used, and the processing conditions at that time, by the processing procedure described below. The process numbers may be stored in the process queue storage unit 5 in the order determined based on the product attributes such as the plate thickness and the plate width stored in the process data. FIG. 7 shows an example of a queue registered for the in-process product group of FIG. 6 by the above method. As shown in FIG. 7, in the processing queue storage unit 5, the processing queues are arranged in the order of the combination of the equipment used and the processing conditions, and the waiting time (determined from the arrival time) is arranged in order from the longest one. The processing number in 6 is registered. In FIG. 7, the product numbers 3, 4 and 26 are registered in two queues, respectively, because there are two possible processing conditions (see FIG. 3). Next, with respect to the processing queue shown in FIG. 7, lot aggregation is performed by the lot aggregation unit 6 according to the lot aggregation conditions shown in FIG.
The lot-collected products are stored in the aggregated lot storage unit 7 (S3). FIG. 8A shows an example of the integrated lot stored in the integrated lot storage unit 7. In-process processes that have not been aggregated (does not meet the aggregation conditions) are not entered. In the processing queue example for each processing condition shown in FIG. 7, for example, the roll type R ₁ of the rolling mill is eight work-in-process (process numbers 1 to 8).
However, since the maximum number of lot aggregation conditions is four (see FIG. 4), in the work-in-process for each processing condition shown in FIG. Numbers 1 to 4) are aggregated. In addition, the roll type R of the rolling mill
_The number of in-process processes of ₂ is 6, which is less than the minimum number (8) of the lot aggregation condition, but process number 9 and process number 10
The waiting time for work in progress is 65 minutes, which exceeds the maximum waiting time for roll type R ₂ , which is 60 minutes.
0 is lot-aggregated with 3, 4, 11, and 12.

Next, referring to FIG.
The setup change time for each piece of equipment and the previous processing condition stored in the previous processing condition storage unit 4 which stores the previous processing condition of each piece of equipment are referred to, and the setup change time determination unit 8
Thus, the setup change time required to process each aggregated lot is calculated (S4). For example, the processing conditions of the rolling mill and the setup change time of the roll type R ₁ in FIG. 8A are 15 minutes. The lot aggregation example shown in FIG. 8A is an example of lot aggregation that satisfies the aggregation condition. In an actual rolling process, etc., a much larger number of combinations of processes occur, and as a result, a large number of setup change times corresponding to the combinations of the above processes occur in each case. For this reason, in this embodiment, virtual execution (simulation) is performed on the above-mentioned many lot aggregation examples, the setup change time at that time is calculated, and the one with the shortest setup change time is selected (S5). In this way, the aggregate lot selecting unit selects the aggregate lot to be processed for each facility based on a predetermined rule such as the minimization of setup change time. In this example, the virtual executing unit 10 selects the aggregate lot. Applicable
Various other selection rules are possible. Figure 8 (b)
Shows an example of the selected integrated lot. Next, for the selected integrated lot, the product attributes such as plate thickness and plate width already included in the process data shown in FIG.
The processing order of the products in the lot is newly set by the processing order setting unit 9 based on the processing order key included in the lot aggregation condition shown in (S6). Here, FIG. 9 is an example of the processing order set for the selected integrated lot. For example, for the roll type R ₁ of the rolling mill for which the processing order key is designated, the processing order key is “plate thickness;-”, so that the products with the largest plate thickness are in the order of (3 → 4 → 1 → 2). Processing is performed. When the processing order key is not set and the product attributes are the same, in this example, the processing is performed in the order of arrival time. It is essential to set the processing order of the products when storing the processing number in the processing queue storage unit 5 and to set the processing order of the products in the lot for the selected aggregate lot. Are the same. Further, the setup change time and the processing time for the selected integrated lot are assigned to each equipment with reference to the results of the virtual execution unit 10 and the processing order setting unit 9 (S7). Then, the previous processing condition storage unit 4 is updated with the processing conditions in each equipment used for processing the selected integrated lot. The processing time of each lot used at the time of allocation is calculated by referring to the process data shown in FIG. 3 from the product type and process of the product forming the lot. FIG. 10 is an example of allocation of processing time and setup change time for each facility for virtually executing the selected lot aggregation example shown in FIG. 8B. In the present embodiment, in the batch processing equipment as in the annealing equipment,
Products, process numbers 17, 18 and 19 are assigned in parallel. As described above, when the aggregate lot to be processed first and its allocation are completed, in order to shift to the procedure for selecting the aggregate lot to be processed next, the in-process process update unit 11 performs the simulation of this time as the virtual execution changes. Then, the in-process processes that have been aggregated and selected are deleted from the processing queue shown in FIG. 7, an aggregated lot that satisfies the aggregation condition is created at that point in the virtual execution, and is newly stored in the queue storage unit 5 ( S8). An example of a work-in-process group in which the process shown in FIG. 6 transits to the next process by the above virtual execution is shown in FIG.
Shown in. Further, FIG. 12 shows an example of the updated processing queue in the in-process status of FIG. In FIG. 12, the process numbers 1 and 2 of the product type B are transited to the process 4 (rolling mill), and in this process, the roll types R ₁ and R ₂ can be selectively selected as the process conditions. It is possible. Therefore, the process numbers 1 and 2 are registered in the two queues of the roll types R ₁ and R ₂ .

Next, the simulation start time updating unit 1
The simulation time is updated by 2 (S9). In the present embodiment, the processing start possible time of the equipment that enables the next processing start earliest among all the equipment is the next simulation time. As can be seen from FIG. 10, in this example, the surface treatment facility is completed at the time 60 minutes and the treatment can be started next earliest, so the simulation time is updated to 60 minutes. After that, lot aggregation → selection → allocation → update are repeated under the updated simulation time. At the simulation time updated to 60 minutes, only the surface treatment equipment is vacant and the treatment can be started. Therefore, the next processable step is selected from the surface treatments. In this case, in the lot consolidation, the paint P ₁ (treatment numbers 13 and 14) and the paint P ₂ (treatment number 32) satisfy the aggregation condition, and the setup change time is the shortest in the same as the previous treatment condition. Since it is the paint P ₁ (setup change time = 0), the paint P ₁ is selected as the processing condition of the next surface treatment equipment. Processing number 23, 2
No. 6 and the processing numbers 17, 18, and 19 have not arrived at the simulation time 60 minutes, and are therefore excluded from the lot aggregation targets. Note that FIG. 13 shows an example in which the process numbers 13 and 14 selected at the simulation time of 60 minutes are assigned. As described above, in the production process simulation apparatus according to the present embodiment, even when performing lot consolidation of a wide variety of products, it is possible to automatically perform optimal lot consolidation that matches processing conditions and lot consolidation conditions. You can Further, the processing order of products in the integrated lot can be set in detail. Furthermore, even in a complicated production process in which products with flexible processing conditions are mixed, an appropriate production schedule can be automatically created.

[0011]

[Embodiment] In the production process simulation apparatus 0 according to the embodiment of the present invention described above, the selection of the intensive lot to be processed is performed so that the setup change time is minimized, but the arrival time is early. Products may be prioritized. Such a production process simulation device is also an example of the production process simulation device according to the present invention. In addition, in the above-mentioned embodiment, the selection of the aggregate lot is
Although it is performed by virtually executing the aggregated lot, it is also possible to calculate the setup change time for each aggregated lot without virtual execution. Further, in the above embodiment,
The production process simulation device 0 aggregates the processes in the metal rolling mill, and virtually executes the production schedule using the lot-integrated processes. However, the production process simulation device is applied to the lot aggregation of other various production lines. You may. Such a production process simulation device is also an example of the production process simulation device according to the present invention.

[0012]

As described above, according to the present invention, the facility used for producing a product is selected from the process data which is determined for each process, and the condition on the facility used for lot aggregation. In a production process simulation device for aggregating a plurality of lots of products of processes having the same processing condition, and virtually executing a production schedule using the products in which the lots are integrated, the above-mentioned equipment and processing for each product type A process data registration unit for registering the above process data including conditions, a lot aggregation condition registration unit for registering a lot aggregation condition which is a condition on the product side for performing lot aggregation under a certain condition, and a process in a waiting state A processing queue creating unit that creates a processing queue in which the above are arranged in a predetermined order according to the equipment used and processing conditions, and a processing queue that stores the created processing queue A storage unit, a lot aggregation unit that creates a plurality of aggregate lots that can start aggregation processing according to the lot aggregation conditions from the processing queue, and an aggregation for storing an aggregate lot group aggregated by the lot aggregation unit. A lot storage unit and an integrated lot selection unit that selects the integrated lot to be processed for each facility from the integrated lot group stored in the integrated lot storage unit based on a predetermined rule. The present invention is configured as a production process simulation device characterized by the following. Therefore, the arrival time of the product that arrived at each facility,
An operator can automatically and accurately perform lot aggregation that matches the processing conditions and lot aggregation conditions simply by inputting equipment to be used and processing conditions automatically. further,
A virtual execution unit that virtually executes the integrated lot group is provided, and in-process processes that have completed processing are deleted as the virtual execution time elapses. By adding the processes in the state to the lot aggregation target, the lot aggregation can be performed continuously in time, and the production schedule according to the actual production state can be created. In addition, if the aggregate lots are selected in each facility so that the setup change time is minimized, the lot aggregation that emphasizes work efficiency can be virtually realized. Further, the predetermined order may be determined based on, for example, the length of waiting time of the product in the waiting state and / or the attribute of the product. In this case, for each lot aggregation condition, the above predetermined order is determined based on the length of the waiting time of the product or based on the attributes such as the thickness and the width of the product. The processing order of the products can be determined in detail and automatically. Furthermore, if the process data registered in the process data registration section includes a plurality of processing conditions that are alternative to each process, products that have a certain degree of freedom in processing conditions will be mixed for a certain facility. You can create production schedules for complex production lines.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a schematic configuration of a production process simulation device 0 according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation procedure of the production process simulation device 0.

FIG. 3 is a chart showing an example of process data related to the production process simulation device 0.

FIG. 4 is a chart showing an example of a lot aggregation condition according to the production process simulation device 0.

FIG. 5 is a chart showing an example of setup change time according to the production process simulation apparatus 0.

FIG. 6 is a chart showing an example of a product-in-process group at the start of simulation.

FIG. 7 is a chart showing an example of a processing queue for each processing condition at the start of simulation.

FIG. 8 is a chart showing a selection state of aggregated lots.

FIG. 9 is a diagram showing a result of aggregate lot allocation by the production process simulation apparatus 0.

FIG. 10 is a chart showing a processing order of products in a selected integrated lot.

FIG. 11 is a chart showing an example of an updated work-in-process group.

FIG. 12 is a diagram showing a processing queue for each processing condition after the simulation time is updated.

FIG. 13 is a diagram showing an example of allocation of aggregated lots after the simulation time of the production process simulation device 0 is updated.

[Explanation of symbols]

0 ... Production process simulation device 1 ... Process data registration section 2 ... Lot aggregation condition registration section 3 ... Setup change time registration section 4 ... Previous processing condition storage section 5 ... Processing queue storage 6 ... Lot aggregation section 7 ... Aggregate lot storage unit 8 ... Setup change time determination unit 9 ... Processing order setting unit 10 ... Virtual execution unit 11 ... Work-in-process update section 12 ... Simulation start time update unit

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-192051 (JP, A) JP-A-8-57752 (JP, A) JP-A-6-266725 (JP, A) JP-B 7- 109601 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 17/60 108 B23Q 41/08 C21D 9/52 101 C21D 11/00

Claims (5)

(57) [Claims] 1. A process in which the processing conditions, which are the conditions on the facility used to perform lot aggregation, are the same as the facility selected from the process data in which the facility used to produce the product is determined for each process. In a production process simulation device that aggregates a plurality of lots of the above products and virtually executes a production schedule using the products in which the lots are aggregated, the above process data including the above used equipment and the above processing conditions for each product type is registered. The process data registration unit, the lot aggregation condition registration unit that registers the lot aggregation condition that is the condition on the product side for performing the lot aggregation under a certain condition, and the process in the waiting state is specified according to the above-mentioned equipment and processing conditions. A processing queue creating unit for creating a processing queue arranged in the order of, a processing queue storing unit for storing the created processing queue, and the processing queue From among the above, a lot aggregation unit that creates a plurality of aggregation lots that can start aggregation processing according to the lot aggregation conditions, an aggregation lot storage unit that stores the aggregation lot group aggregated by the lot aggregation unit, and a predetermined rule. The integrated lot selection unit selects the integrated lot to be processed for each facility from the integrated lot group stored in the integrated lot storage unit based on Production process simulation device. 2. A virtual execution unit that virtually executes the aggregated lot group, deletes a lot of which processing has been completed in accordance with the lapse of time of the virtual execution, and among the steps of the same equipment used as the completed lot. 2. The production process simulation apparatus according to claim 1, further comprising lot replenishing means for collecting lots of processes in a waiting state and storing the lots in the integrated lot storage unit. 3. A setup change time registering unit for pre-registering a setup change time determined by a combination of processing conditions before and after each equipment, wherein the predetermined rule is that the setup change time in each equipment is smaller. The production process simulation device according to claim 1, wherein the rule is a rule for selecting the integrated lot. 4. The method according to claim 1, wherein the predetermined order is determined based on a length of waiting time of a product in a waiting state and / or an attribute of the product. Production process simulation device. 5. The production process simulator according to claim 1, wherein the process data registered in the process data registration section includes a plurality of processing conditions which are alternative to each process. Device.