JP2600628B2 - Work order determination method considering multiple assignment conditions - 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 management technique, and particularly to a jib shop type production site, in which a plurality of product operations that can be allocated to a certain manufacturing facility have different priorities. The present invention relates to a work order determination method that considers a plurality of allocation conditions and determines one product to be allocated in consideration of a plurality of allocation conditions.

[0002]

2. Description of the Related Art A jib shop-type production site is equipped with a plurality of types of manufacturing equipment (e.g., drilling equipment, cutting equipment, etc .; hereinafter, simply referred to as equipment). A plurality of types of products are manufactured at the same time while appropriately using some facilities that match manufacturing processes (hereinafter, simply referred to as processes). Each facility is shared for processing a plurality of types of products, but is occupied by the operations of one type of product during the operation of the product. Therefore, for example, facilities 1, 2,
Product A manufactured using the order of 3, 4
In the case where there is a product B manufactured using 4,1 in that order, the facilities 1,3,4 are shared by the products A, B. Then, for example, when the operation of the product B is performed in the facility 3, the process using the facility 3 of the product A is waited. When the work of the product B is completed in the facility 3, the work of the product A is assigned to the facility 3.

[0003] By the way, at the time when the occupancy of a certain product in a certain facility is released and the allocation of another product becomes possible, if there are a plurality of products that can be allocated to the relevant facility, which of the products should be allocated? Is a problem. For example, in the above example, if there is another product C other than A as a product waiting for the facility 3, the product A or the product C is assigned to the facility 3 whose occupation by the product B is released. Is a problem.

In order to solve such a problem, conventionally, one assignment condition is determined, and products are assigned according to the assignment condition. For example, the allocation condition that gives priority to the product with the shortest delivery date is defined, and if there are multiple products that can be allocated to the equipment whose occupancy has been released, the product with the shortest delivery date is allocated. Was. When the single allocation condition cannot narrow down the number of products to be allocated to one, the serial number uniquely assigned to each product (this serial number is automatically assigned in the order of registration) Allocated a small one.

[0005]

As described above, conventionally,
A single allocation condition is set, and products to be allocated are narrowed down by the single allocation condition. Further, when it is not possible to narrow down to one, the assignment is immediately made according to the serial number uniquely assigned to each product. Therefore, for example, when a delivery date is set as an assignment condition, in a production site where many products with the same delivery date are manufactured, there are many opportunities to be assigned according to the serial number assigned to each product, and other attributes of the product (processing time , The number of remaining processes, etc.).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work order determining method which enables setting of a plurality of assignment conditions and assignment based on the set assignment conditions.

As a technique similar to the present invention, there is a "process control method and apparatus" disclosed in Japanese Patent Application Laid-Open No. 3-221359. In this prior art, each product (lot) is given a higher priority as it is later than expected, and when there are a plurality of lots that can be assigned to a certain facility, the priority given to the lot and the The lot to be assigned is determined by comprehensively judging the waiting time until the lot can be processed and the usage rate of the lot with respect to the allowable processing amount of the facility. In this conventional technique, a plurality of conditions (priority assigned to a lot, waiting time until the lot can be started to be processed, usage rate of the lot with respect to an allowable processing amount of the facility) are considered as allocation conditions. However, for example, even if a lot has the highest priority assigned to a lot, it may not be assigned if the waiting time until processing can be started is long, Even if the waiting time is short, there is no clear priority between the allocation conditions, such that a lot with a low assigned priority may not be allocated. For this reason, there is a problem in that it is desired to allocate the products in the order of earlier delivery date, but if there are a plurality of products with the same delivery date, it is not possible to respond to a request to assign the products in the order of shorter working time.

Therefore, another object of the present invention is to assign different priorities to a plurality of allocation conditions and apply the allocation conditions in order from the one with the highest priority, so that it is not possible to narrow down the products to be allocated to one. Only in such a case, an object of the present invention is to provide a work order determination method in which a lower priority assignment condition is applied.

Further, as shown in the above-mentioned publication, the allocation conditions are generally incorporated into logic in a program. For this reason, there is also a problem that it is not easy to change the allocation conditions.

Therefore, still another object of the present invention is to make it possible to freely change allocation conditions and their priorities.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an allocation condition and priority storage unit in which a plurality of types of allocation conditions each having a different priority are registered, and a registered content. When there are a plurality of product operations that can be assigned to the operable equipment and a registration change unit for changing, the assignment condition and the assignment condition registered in the priority storage unit are assigned in descending order of priority. In order from the lowest, the work of the product to be assigned is 1
And an allocation operation determining unit that determines one operation of the product to be allocated by applying until the number of products is reduced to one.

[0012]

In the present invention, the allocation condition and priority storage unit holds a plurality of allocation conditions such as, for example, allocation in ascending order of delivery time, allocation in ascending order of processing time, and allocation in ascending order of the number of remaining steps.
If there are multiple product operations that have their priorities and can be assigned to operable equipment,
The allocating operation determining unit applies the allocating conditions and the allocating conditions registered in the priority storage unit in descending order of priority until the number of products to be allocated is reduced to one.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, an example of a work order determining apparatus 1 to which the present invention is applied includes an information storage means 20, an equipment operability determination unit 14, an allocatable work selection unit 15, an allocation condition and priority storage unit 16. , Assignment work judgment unit 1
7, a work instruction issuing unit 18 and a registration changing unit 19. Further, the information storage unit 20 includes the equipment information storage unit 1.
1, a work information storage unit 12, a work process and progress information storage unit 13. In addition, 2 is a production site and 3 is a sensor.

The production site 2 is a job shop type production site, and is equipped with a plurality of types of equipment for manufacturing various types of products. One product is sequentially processed and completed through a plurality of facilities, such that the starting material is processed in one facility and then further processed in another facility. The manufacturing process differs for each product, and accordingly, the equipment to go through also differs. Although each facility is not a facility used only for a specific product, it is occupied by work of one product at a time, and work of another product cannot be performed simultaneously.

Various kinds of management information are stored in the information storage means 20 of the work order determination device 1. this house,
The equipment information storage unit 11 stores information on a plurality of equipment installed at the production site 2. FIG. 2 shows an example of the equipment information stored in the equipment information storage unit 11 in a case where there are five types of equipment at the production site 2. In the equipment information, information such as the equipment name, the number, the processing capacity, and the operating time is set for each type of equipment.

On the other hand, the work information storage section 12 stores information on the processing work for each product manufactured at the production site 2. FIG. 3 shows an example of the work information stored in the work information storage unit 12, and shows a case where five types of products A to E are manufactured. In the work information, information such as a serial number, a product name, a quantity, and a delivery date is set for each product. Here, the serial numbers are assigned in the order of registration, and are unique for each product.

The work process and progress information storage unit 13 stores information on the work process such as which facilities each product is completed and in what order, and the current status of each process of the work of each product. Is stored. FIG. 4 shows an example of information stored in the work process and progress information storage unit 13. Each product is identified by the product name attached to it, and for each product name, the process number, unit processing time, total processing time, equipment name (the above is information on the work process) are set, and items such as start and completion are set. (This corresponds to the progress information). For example, it is shown that the product A is manufactured through four processes of process numbers 10, 20, 30, and 40, and that those processes use facilities with facility names 1, 2, 3, and 4. Also, a unit processing time and a total processing time for each process are set. Further, when a black circle is entered in the item of start and completion, it indicates that the corresponding step is started and completed.
That is, in the case of the product A, the process up to the process number 20 is completed at the time of FIG. 4, and the process to be started next is the process number 30. Similarly, for the product C, it is shown that the process of the process number 10 is completed and the process of the process number 20 is underway.

In the progress information as described above, the item to be started is updated when an instruction to start the item is issued from the work instruction issuing unit 18 of the work order determination device 1 to the production site 2. . The item of completion is production site 2
Is updated by the information obtained from the sensor 3 which grasps the status of each facility.

On the other hand, the allocation condition and priority storage section 16
, A plurality of allocation conditions and their priorities are set. FIG. 5 shows an allocation condition and priority storage section 16.
Shows an example of the information stored in. In this example, four allocation conditions are set. First, the first allocation condition is “short delivery time” in which the delivery time is assigned in ascending order of delivery time, and its priority is 1. The second allocation condition is
This is a “short processing time” in which the processing time (working time) is allocated in ascending order. The third allocation condition is “the number of remaining processes is small” in which the remaining processes are allocated in ascending order, and the priority is 3
It is. The last assignment condition is “registration order” in which assignment is performed in the order registered in the work information storage unit 12, and its priority is 4.

The registration of the allocation conditions and priorities in the allocation conditions and priority storage section 16 is performed by a registration change section 19 composed of a keyboard or the like. In addition, the registration change unit 19 can also delete and change the already registered allocation conditions and change the priority.

The work order determining device 1 in the embodiment shown in FIG.
Includes a portion 11 for storing various types of information as described above,
In addition to 12, 13, and 16, a functional unit for determining a work sequence using the information is provided with a facility operability determination unit 14, an allocatable work selection unit 15, and an allocatable work determination unit 17, and A work instruction issuing unit 18 that issues a work instruction to the production site 2 is provided. Here, the equipment operability determination unit 14 determines the equipment operable based on the work process and progress information storage unit 13 and the information in the equipment information storage unit 11, that is, the occupation by a product after the work of a certain product is completed. This is a part that detects equipment that has been released and can now be assigned another product. The allocatable work selection unit 15 is a part that refers to the work process and progress information storage unit 13 and selects all products that can be allocated to the equipment that has become operable. Further, the assignment work determination unit 17 refers to the assignment condition and priority storage unit 16, the work information storage unit 12, and the work process and progress information storage unit 13, and selects the assignable work selection unit 15. This part determines one product from among products as an allocation target product.

The operation of this embodiment will be described below with reference to the drawings.

Now, it is assumed that information as shown in FIGS. 2, 3, and 4 is stored in the facility information storage unit 11, the work information storage unit 12, and the work process and progress information storage unit 13, respectively. In particular, the work process and the progress information in FIG. 4 indicate that each work is in the following status at the present time. The operation of the product A; the process up to the process of the process number 20 is completed, and the process of the process number 30 is awaited. The reason is that the work of the product C is being started in the facility 3. O Work of product B; waiting for the start of the process of the first process number 10. The reason is that the work of the product C is being started in the facility 3. ○ Work of product C; work of process number 20 is in progress at facility 3. ○ Work of product D; waiting state like work B. O Work on product E: Complete the process of process number 10 and wait for the start of process number 20. The cause is that the work of product C is equipment 3
It is for the work in progress. That is, the products A, B, D, and E are in a “waiting” state in front of the facility 3.

When the operation of the process number 20 of the product C in progress in the facility 3 is completed, and the fact is transmitted from the sensor 3 to the operation process and progress information storage section 13 of the operation sequence determination device 1, the operation process The progress information storage unit 13 updates the current status according to the notification from the sensor 3. FIG. 6 shows the work process and the status of the progress information storage unit 13 after this update.

Each time the work process and progress information storage unit 13 is updated, the equipment operability determination unit 14 refers to the work process and progress information storage unit 13 and the facility information storage unit 11 to determine which equipment It is determined whether or not operation becomes possible. In the case of FIG. 6, if the facility 3 has completed the work using the product C and the current time is within the operating time of the facility 3 in the facility information shown in FIG. 2, it is determined that the facility 3 is operable. . Then, the fact is transmitted to the allocatable work selection unit 15. In the case of the product C, the process number 30
Is started at the facility 2, and such an instruction is also issued from the work sequence determination device 1 to the production site 2.
Since it is not directly related to the present invention, a detailed description thereof will be omitted.

When the information indicating that the equipment 3 is operable is transmitted from the equipment operability determination unit 14, the allocatable work selection unit 15 determines the work of the product that can be allocated to the equipment 3 at the present time, as shown in FIG. Select by referring to the process and progress information. As a result, the operation of the process No. 20 of the product A, the operation of the process No. 10 of the product B, the operation of the process No. 10 of the product D, and the operation of the process No. 20 of the product E are selected, and these pieces of information are assigned. Transmit to 17.

The allocation work judging section 17 starts the processing shown in FIG. 7 when the work of the allocatable product is notified from the allocatable work selection section 15. First, it is determined whether or not there is only one product that can be allocated (S1). If there is one product, it is not necessary to narrow down the product, and the work instruction issuing unit 18 is notified as it is (S6). On the other hand, when a plurality of products are transmitted from the allocatable work selection unit 15 as allocatable, the allocation condition and priority storage unit 1
6 are applied in descending order of priority, and one of them is determined as a product to be allocated (S2 to S5).

Therefore, in the present example in which the allocatable work selector 15 is notified that the four products A, B, D, and E can be allocated, the allocatable work selector 15 first stores the allocation condition and the priority. FIG. 5 stored in the unit 16
Among the four allocation conditions shown in (1), the allocation condition of the first priority, "short delivery time", is applied to narrow down the products that can be allocated. That is, FIG. 3 stored in the work information storage unit 12
The delivery date of each product A, B, D, and E is extracted from the information shown in Table 3 and the result is product A; 3/14 product B; 3/14 product D; 3/14 product E; 3/20. Product A,
Narrow down to B and D. At this stage, only one product E is removed, and three products still remain, so that one product cannot be narrowed down.

Then, the assignment work determination unit 17 next applies the second priority assignment condition “short machining time”,
Further narrowing down is performed. In this case, the processing time of the operation of each product in the equipment 3 is as follows, referring to the total processing time in the operation process and progress information storage unit 13. Product A: 5.0 hours Product B: 10.0 hours Product D; 5.0 hours When the product with the shortest processing time is extracted from these results, products A and D are obtained. Even at this stage, only one product B is removed, and two products still remain and are not narrowed down to one.

Therefore, the assignment work determination unit 17
Further narrowing down is performed by applying the priority assignment condition of “the number of remaining processes is small”. In this case, the number of remaining processes for each product can be obtained by referring to the process number and the items of start and completion in the work process and progress information storage unit 13; product A; one process (excluding processes in the facility 3) product B; There are two processes (excluding the process at the facility 3), and the product A has priority because the product A has fewer remaining processes. Here, the work of the product to be allocated next is narrowed down to one. If it is not possible to narrow down to one even at this stage, the fourth priority assignment condition “registration order” is applied. This is a condition that gives priority to the smaller serial number assigned to the work information shown in FIG. 3, so that the number can be narrowed down to one.

When the allocation work judging section 17 determines one allocation target product, it transmits it to the work instruction issuing section 18. The work instruction issuing unit 18 issues a work instruction to the equipment 3 of the production site 2 indicating that the work of the product to be started next is the work of the process number 30 of the product A. At the same time, the work instruction issuing unit 18 updates the work process and the progress information in the progress information storage unit 13 and sets a black circle as the start item of the process with the process number 30 of the work A. FIG. 8 shows the updated work process and the status of the progress information storage unit 13.

[0033]

As described above, according to the present invention, there are a plurality of products which can be allocated to the operable equipment in a jib shop type production site where a plurality of types of products are manufactured at the same time. In this case, a plurality of preset allocation conditions are applied in order from the one with the highest priority, so that one allocation target product is narrowed down. In this way, it is possible to realize an assignment in a form in which assignment is desired in the order of short working time.

The assignment condition and its priority can be changed by the operation of the registration change unit, and the logic of the assignment work judgment unit does not need to be changed. Therefore, the assignment condition and its priority can be easily changed. Therefore, versatility is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of equipment information stored in an equipment information storage unit.

FIG. 3 is a diagram illustrating an example of work information stored in a work information storage unit.

FIG. 4 is a diagram illustrating an example of information stored in a work process and progress information storage unit.

FIG. 5 is a diagram illustrating an example of information stored in an allocation condition and priority storage unit.

FIG. 6 is a diagram illustrating an example of the work process and the information stored in the progress information storage unit after updating.

FIG. 7 is a flowchart illustrating a processing example of an assignment work determination unit.

FIG. 8 is a diagram illustrating an example of the work process and information stored in a progress information storage unit after updating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Work order determination apparatus 2 ... Production site 3 ... Sensor 11 ... Equipment information storage unit 12 ... Work information storage unit 13 ... Work process and progress information storage unit 14 ... Equipment operability determination unit 15 ... Allocatable work selection unit 16 ... Assignment condition and priority storage unit 17 Assignment work determination unit 18 Work instruction issuing unit 19 Registration change unit 20 Information storage means

Claims (3)

(57) [Claims] 1. A production site that includes a plurality of types of equipment and simultaneously manufactures a plurality of types of products while appropriately using some of the plurality of types of equipments that match processing operations of a product to be manufactured. Therefore, each facility can be used for processing a plurality of types of products, but during the operation of one type of product, one type of product is used at a jib shop type production site where the product is occupied by the product. Work is completed, the occupation of that product is released from the occupation, and a new product to be assigned to the operable equipment that can now be assigned a new type of product, An allocation condition and priority storage unit in which a plurality of types of allocation conditions each having a different priority are registered, and a case where there are a plurality of products that can be allocated to the operable equipment. The allocation condition and the allocation condition registered in the priority storage unit are applied in order from the one with the highest priority to the one with the lowest priority until the products to be allocated are narrowed down to one, and the allocation to determine one product to be allocated is performed. A work order determination method, comprising a plurality of assignment conditions, comprising a work determination unit. 2. The work order determination method according to claim 1, further comprising a registration change unit that changes the registered contents of said allocation condition and priority storage unit. 3. Process information indicating the facilities that each type of product reaches to its completion and the order in which they are completed, progress information indicating the current status of each process of each product, operating time for each facility, and the like. Information storage means for storing work information such as equipment information and the delivery date of each product; and equipment operable for determining operable equipment by referring to the equipment information, the work process information and the progress information of the information storage means A determination unit, and referring to the work process and the progress information in the information storage unit, select a work of a product that can be allocated to the operable equipment, and determine the work of the selected product in the allocation work determination. An assignable work selecting unit for notifying a unit, and a work instruction issuing unit for instructing the operable equipment at the production site on a product to be started next in response to the determination of the assigning work determining unit 3. The plurality of allocation conditions according to claim 2, wherein the allocation work determination unit has a configuration in which information on each product necessary for narrowing down by the allocation conditions is referred to from the information storage unit. A work order determination method that takes into account.