JPH0916683A - Work allocating system - Google Patents

Abstract

PURPOSE: To reduce defective processes at the time of work execution by allocating work to a working subject having high yield as preferential as possible. CONSTITUTION: A work allocation control part 10 acquires the yield information of each working subject to be allocated to the work by retrieving a work order file 11, a working subject file 12, a product sort/work sort/working subject sorted yield master file 12, and a work sort/working subject sorted yield master file 14, acquires the allocation state of each working subject by retrieving a work order file 15 for work allocated to each work subject so that work is allocated to a working subject having high yield within a range permitted by the allocation state. A yield maintaining part 20 calculates yield by referring to working order experience file 21 and a yield control master file 22 and updates the contents of the files 13, 14 so as to maintain the yield information at an optimum state based upon the calculated result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an appropriate work entity among a plurality of work entities (machines or workers (humans)) capable of performing the same work (work for manufacturing a product). The present invention relates to a work assignment method for assigning work.

[0002]

2. Description of the Related Art Heretofore, in this type of work allocation method, work is allocated without considering the production capacity of a plurality of work subjects capable of performing the same work. That is, when a work order for a certain work is generated, the work for the work order is arbitrarily selected from the plurality of work bodies capable of performing the work (“arbitrarily” with respect to the manufacturing capacity). Had been assigned.

[0003] The "work assignment system" includes a "work assignment system in which the work is assigned to an appropriate work entity from a plurality of work entities capable of performing the same work" in the present invention. In addition, there is a work allocation method that appropriately allocates a work amount, a work time, and the like for a plurality of work subjects that perform a plurality of different works (one process is realized by the plurality of work sequences). Regarding such a work assignment system, for example, the following publications disclose a work assignment system in consideration of the capability of the worker. Japanese Unexamined Patent Publication No. Hei 5-298280 (load pile collapse simulation method and apparatus) Japanese Unexamined Patent Publication No. Hei 4-346162 (production process planning table creation apparatus) Japanese Unexamined Patent Publication No. Hei 1-128161 (work scheduling method)

In the prior art disclosed in these publications, after a certain assignment, each work entity (Japanese Patent Laid-Open Publication No.
The assignment of work to “processing means” or “processing device” in JP-A-8280, “raw material supply device” in JP-A-4-346162, and “worker” in JP-A-1-128161) Beyond the abilities of the subject ("processing capacity" in JP-A-5-298280, "supply capacity" in JP-A-4-346162, and "working time by worker" in JP-A-1-128161) If there is, the assignment is changed (shifted) in consideration of the ability.

[0005] However, such a conventional technique is a technique for allocating work to a plurality of work entities that perform different works to the last. It is difficult to apply to "work assignment in which the work is assigned to an appropriate work subject from the work subjects".

[0006]

In the above-described conventional work assignment system (a work assignment system in which a work is assigned to an appropriate work subject from a plurality of work subjects capable of performing the same work), the same work assignment system is used. When there is a plurality of work subjects that can perform the work, since the production capacity of each work subject is not considered when allocating the work, the variation in the production capacity of the work As a result, the degree of perfection of the product manufactured by the work (quality of the work result) varies, and the ratio of the actual process failure increases from the ratio of the process failure (loss) at the time of planning (the manufacturing The quality of the product to be manufactured may be reduced), and the process defect may increase the amount of work or the amount of work time, or increase the manufacturing cost. Cormorant problem there is.

SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide a method for manufacturing capacity (here, the type of product (type of product) and the type of product for each type of operation represented by the yield record) at the time of work assignment. Assignment of work taking into account the capability), assigning work preferentially to the work subject with the highest yield as much as possible, and reducing process defects (loss) (work volume and work time based on the reduction of process defects) It is an object of the present invention to provide a work assignment method (“work assignment method considering production capacity”) that enables reduction of manufacturing costs and suppression of manufacturing costs.

[0008]

According to the work assignment method of the present invention, a work order file for managing work order information for work to be assigned and a plurality of work subjects capable of performing the same work are grouped. A work subject file that manages the capability information of a plurality of work subjects belonging to each work subject group as work subject information, and a product type / work type / work subject yield that manages the yield of each work subject by type and work type A master file, a work type / work subject-specific yield master file that manages the yield of each work subject by work type,
A work order assigned work order file for managing work order information assigned to each work subject for work assigned to each work subject, and a past work result for the work order assigned to each work subject for the work assigned to each work subject. A work order performance file managed as performance information, a yield control master file managing yield control information, and a search for the work order file and the work subject file based on the work order included in the work allocation request. And obtains the work subject information indicating the plurality of work subjects that can be assigned to the work to the plurality of tasks, and searches for the yield master file by type / work type / work subject and the yield master file by work type / work subject. The yield information of each of the work subjects is obtained, and the work orders assigned by the work subjects are obtained. A work assignment control unit that acquires the assignment status of each of the plurality of work subjects by searching for the file, and assigns the work to a work subject having a good yield within the range of the assignment status based on the acquisition of the information. A work order record indicated by the work order record information in the work order record file is obtained based on the stay maintenance request, and a yield based on the work order record is obtained based on the yield control information in the yield control master file. A step of performing calculation and updating the type / work type / work subject yield master file and the work type / work subject yield master file to maintain yield information optimally based on the calculation result. And a maintenance part.

[0009]

According to the work assignment method of the present invention, a work order file manages work order information for work to be assigned, and a work subject file groups a plurality of work subjects capable of performing the same work, and performs each work. The ability information of a plurality of work subjects belonging to the subject group is managed as work subject information, and the yield master file by type / work type / work subject manages the yield of each work subject by type and work type,
The work type / work subject yield master file manages the yield of each work subject by work type, and the work subject assigned work order file is the work subject assigned work order information for the work assigned to each work subject The work order performance file manages the past work performance of the work order for the work assigned to each work subject as work order performance information, and the yield control master file manages the yield control information, The assignment control unit has the following A to A
And the yield maintenance unit performs the processes shown in B to B below. A By searching the work order file and the work subject file based on the work order included in the work assignment request, work subject information indicating a plurality of work subjects that can be assigned to the work for the work order is acquired. A Search for the type / work type / work subject yield master file and work type / work subject yield master file (in some cases, only the type / work type / work subject yield master file may be searched) To obtain the yield information of each of the plurality of working subjects. A: The assignment status of each of the plurality of work subjects is acquired by searching the work order files assigned by the work subject. A Based on the acquisition of the information described above, the work is allocated to a work subject having a high yield as far as the allocation status allows. B Based on the yield maintenance request, acquire the work order result indicated by the work order result information in the work order result file. B: Based on the yield control information in the yield control master file, a yield calculation based on the work order results is performed. Based on the calculation result of BB, the type / work type / work subject yield master file and the work type / work subject yield master file for maintaining the yield information optimally are updated.

[0010]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the work allocation system of the present invention.

The work assignment method according to the present embodiment employs an information processing apparatus 100 and a terminal 20 connected to the information processing apparatus 100.
1, 202, 203, 204, and 205 (general terminals capable of inputting data and instructions). However, the information processing system that realizes the work assignment method of the present embodiment is not limited to the above configuration. For example, the number of terminals and the connection mode are not limited to the contents shown in FIG.

The information processing apparatus 100 includes a work assignment control unit 10, a work order file 11, a work subject file 12, a type / work type / work subject yield master file 13, a work type / work subject separate step. Tome Master File 14
, An assigned work order file 15 for each work subject, a yield maintenance unit 20, a work order record file 21, and a yield control master file 22. Composed of these components).

In the information processing apparatus 100, a terminal 201 for giving an instruction to the work assignment control unit 10, a terminal 202 for making a data entry to the assigned work order file 15 for each work subject, and an instruction for the yield maintenance unit 20. Terminal 2
03, a terminal 204 that performs data entry for the work order record file 21, and a yield control master file 2
2 is connected to a terminal 205 that performs data entry for the second.

FIG. 2 is a diagram showing work order information stored in the work order file 11. The work order information includes a work order number, a work type code, a product name code, quantity information (the number of inputs and a planned completion), and start schedule information (the earliest scheduled date (earliest scheduled start date) and the latest scheduled date ( The latest scheduled start date)), the required time, the working status,
It consists of a work subject group code.

FIG. 3 is a diagram showing work subject information stored in the work subject file 12. The work subject information is
A plurality of pieces of capability information (work subject code (work subject code indicating each work subject belonging to the work subject group) corresponding to the work subject group code) and capabilities (for example, [H (Hou
r) / day], and one or more special work information (special day and ability)). Since some work subjects do not carry out special work, there may be capability information that does not have special work information.

FIG. 4 is a diagram showing the type / work type / yield information by work subject stored in the yield master file 13 by type / work type / work subject. The type / work type / work subject yield information includes a product name code, a work type code, a work subject code, and yield information (yield order (a work order of the work subject in the work subject group to which the work subject belongs). And the yield [%] (yield expressed as a percentage)). The yield order in the yield information is information set for speeding up the processing, and is not essential information (the work type / work entity in the yield master file 14 for each work type / work entity). The same applies to other yield information).

FIG. 5 is a view showing yield information by work type / work subject stored in the yield master file 14 by work type / work subject. The work type / work subject yield information includes a work type code, a work subject code, and yield information (yield order and yield [%]).

FIG. 6 is a diagram showing the work subject assigned work order information stored in the work subject assigned work order file 15. The assigned work order information by work subject includes a work order number, a work type code, a product name code, quantity information (number of inputs and planned completion), and assignment information (assigned work subject code and assignment time information (assignment start). Month and day time and completion month and day time)).

FIG. 7 is a view showing work order record information stored in the work order record file 21. The work order actual information includes a work order number, a work type code, an item name code, a work subject code, a completion date,
It consists of quantity information (the number of inputs and the number of non-defective products).

FIG. 8 is a diagram showing the yield control information stored in the yield control master file 22. The yield control information includes a product name code, a calculation method, and an effective range (a value fluctuation range and a required minimum parameter).

FIG. 9 is a flowchart showing the processing of the work assignment control unit 10. This processing includes a work order information acquisition step 901, a work order end determination step 902,
Allocatable work subject information obtaining step 903, yield information obtaining step 904, allocation status obtaining step 90
5, an allocatable determination step 906, an allocation processing step 907, and an all work subject end determination step 908.
And a non-assignable mark storage step 909 and an unassignable order adjustment step 910.

FIGS. 10A and 10B are flow charts showing the processing of the yield maintenance unit 20. This processing includes a new registration / update step 1001 for a type / work type / work subject-specific yield master file, a new registration / update step 1002 for a work type / work subject, and a new registration / yield control master file / yield control file. Update step 1003, work order result acquisition step 1004, yield calculation information acquisition step 1005, effective range satisfaction determination step 1006
, A yield calculation step 1007, a yield information update step 1008, and an end determination step 1009.

Next, the operation of the work allocating method according to the present embodiment configured as described above will be described.

First, the operation of the work assignment control unit 10 will be described.

The work assignment control unit 10 inputs a work assignment request (a request having a work order (including a start date and time of assignment of the work) for one or more works) instructed from the terminal 201, and shows the following. Such processing is performed (FIG. 9
reference).

First, work order information corresponding to unassigned work (work assigned to the work order included in the work assignment request and not assigned) is sequentially read from the work order file 11. That is, the work order information as shown in FIG. 2 is acquired one by one (step 901).

Based on whether or not the work order information can be obtained in step 901, it is determined whether or not the work assignment processing for all the work orders included in the work assignment request has been completed (step 902). That is, if the work order information for the unassigned work no longer exists in the work order file 11, it is determined that the work assignment processing for all the work orders included in the work assignment request has been completed.

If it is determined in step 902 that “work order information has been obtained (the work assignment processing has not been completed)”, the work subject group code in the work order information obtained in step 901 is used as a key. The work subject file 12 is searched as an item, and work subject information (see FIG. 3) for a work subject group to which a plurality of work subjects that can perform the work belongs is acquired (step 90).
3).

Further, the item name code and the work type code in the work order information obtained in step 901 and the work subject code (a plurality of work subject codes) in the work subject information obtained in step 903 are used as key items. The yield information (yield order and yield [%]. FIG. 4)
And FIG. 5) (step 904).

The yield master file 13 for each product type / work type / work subject is searched by the above-mentioned key items. By this search, the corresponding work type (the work type specified by the work order information) for the corresponding product name (the product name specified by the work order information)
Yield and yield [%] when the corresponding work subject (work subject for the work subject code) performs the above work
(Yield information in the type / work type / work subject yield information corresponding to the key item) is acquired. This acquisition process is performed for all the work subjects included in the work subject group.

If the corresponding yield information (information corresponding to the above-described key items) does not exist in the type / work type / work subject yield master file 13 in the search, the work type code in the above-described key items And the work subject code as key items, the yield master file 14 for each work type / work subject.
Search for. By this search, the yield order and the yield [%] when the work of the corresponding work type is performed by the corresponding work subject (the yield information in the yield information by work type / work subject corresponding to the key item) ) To get. This acquisition process,
This is performed for all the work subjects included in the work subject group.

Next, as shown below, step 9
The assignment status of each work subject indicated by a plurality of work subject codes in the work subject information acquired in step 03 is acquired (step 905).

That is, the yield information by type / work type / work subject or the yield information by work subject / work subject in ascending order of yield (in order of good yield) in the yield information acquired in step 904. Are retrieved one by one, and the work subject assigned work order file 15 is searched using the work subject code in the information as a key item. As a result of this search, the assignment start date and time and the completion date and time (the assignment time information in the assignment information in the assignment work order information in which the assignment code is set as the assignment subject code. See). If the yield order does not exist in the yield information, the yield order is calculated based on the yield [%].

Next, based on the assignment status obtained in step 905, it is determined whether or not it is possible to assign the work corresponding to the work order information obtained in step 901 to the work subject (step 906). That is, it is possible to allocate the required time in the work order information acquired in step 901 between the earliest scheduled date and the latest scheduled date in the work order information to the work subject in the assignment status acquired in step 905. It is determined whether or not it is possible (whether or not there is a free time).

If it is determined in step 906 that "the work can be allocated to the work subject", the following allocation processing is performed (step 907).

First, the following information (1) to (3) are stored in the work order assigned work order file 15.

The work order number, the work type code, the product name code, and the quantity information (the number of inputs and the number of scheduled completions) in the work order information acquired in step 901 are stored in a new work order file 15 It is stored in the corresponding item in the work order information assigned by work subject.

The work subject code of the work subject determined to be “assignable” in step 906 is stored in the assigned work subject code item in the assignment information in the work subject assigned work order information.

The assignment start indicated by the work order corresponding to the work order information acquired in step 901 (the work order included in the work assignment request instructed from the terminal 201 and currently being processed). The date and time are stored in the assignment start date and time item in the assignment information in the work entity assigned work order information, and the required time in the work order information acquired in step 901 is stored at the assignment start date and time. The added time is stored in the completion date time field in the allocation information.

Next, in the work order information (work order information acquired in step 901) in the work order file 11, the status of “planning” (status indicating that the work has been assigned) is added to the work status item. Store.

If it is determined in step 906 that "the work cannot be assigned to the work subject",
It is determined whether or not the processing in step 905 and the determination in step 906 have been completed for all the work subjects belonging to the work subject group (step 908).

If it is determined in step 908 that "the processing in step 905 and the determination in step 906 have not been completed for all the working subjects belonging to the working subject group", the working subject with the next lowest yield rank The processing of step 905 and the determination of step 906 are performed. In this way, the above-described assignment status acquisition processing (see step 905) and assignment availability determination (step 90)
6) is repeated until there is no longer a work subject code in the work subject information acquired from the work subject information file 12.

When it is determined in step 908 that "the processing in step 905 and the determination in step 906 have been completed for all the working subjects belonging to the working subject group" (when all the working subjects cannot be assigned to all the working subjects) , An assignment impossible mark indicating a status of “pending” (status indicating that assignment is impossible) is stored in the work status item in the work order information in the work order file 11 (step 909).

Processing in step 907 or step 90
When the processing of No. 9 is completed, the processing from step 901 is repeated for the next work order in the work allocation request.

If it is determined in step 902 that "work order information could not be obtained (work assignment processing based on the work assignment request has been completed)", the assignment is not allowed (the work status in the work order information is not displayed). Hold on item
The adjustment of the work order in which is stored is performed according to the following procedures (step 910). This allocation adjustment is a human-based (interactive) process. Further, the present invention can be realized without this allocation adjustment processing (in that case, if it is determined in step 902 that “work order information could not be obtained”, FIG. 9 is shown. Processing ends).

The work order file 11 is sequentially searched to obtain work order information whose work status item is “pending” (work order information for non-assignable orders).

The work subject file 12 is searched by using the work subject group code in the work order information acquired in the above as a key item, and includes a plurality of pieces of capability information (work subject code, capability, and one or more special work information). Get work subject information.

The work order assigned to each work subject is searched for using the work subject code in each piece of capability information in the work subject information obtained in the above as a key item, and the assignment status of each work subject (work assigned to each work subject) Order information)
To get.

The work order file 11 is searched using the work order number in the work subject-assigned work order information obtained in the above as a key item, and the assignment status is moved (the assignment status is changed) for the assignment of the non-assignable order to be adjusted. Change or update to the pending state). If there is a movable work order, the assignment status of the work order is changed (or updated to a pending state), and the work is assigned to the non-assignable order to the work entity assigned to the work for the work order. Try.

The update of the work subject assigned work order file 15 and the work order file 11 due to the assignment of the work to the assignment impossible order in (the storage of the work subject assigned work order information for the assignment impossible order and the assignment impossible). Change the item of the work state in the work order information for the order (change from “pending” to “planning”). The contents of this processing are performed according to the above-described allocation processing in step 907.

The work assignment control unit 10 as described above
When the work is executed after the work is assigned by the user, the work order number is assigned as a key item by inputting data from the terminal 202, and the work subject assigned work order information in the work subject assigned work order file 15 is input. Is applied.

Second, the operation of the yield maintenance unit 20 will be described.

The yield maintenance unit 20 utilizes the work order record file 21 and the yield control master file 22 to store the yield master file 13 for each type / work type / work subject and the yield master file for each work type / work subject. 14 automatic registration / update. Further, the yield master file 13 for each type / work type / work subject, the yield master file 1 for each work type / work subject, by human-based processing (interactive processing).
4 and the yield control master file 22 are newly registered / updated.

First, the operation of newly registering / updating the type / work type / work subject yield master file 13, the work type / work subject yield master file 14, and the yield control master file 22 will be described.

The yield maintenance unit 20 performs the following processing (human-based processing) based on the input of an instruction (including data) from the terminal 203 and the input of data from the terminal 205 (FIG. 10 (a)). )reference).

Based on an instruction and data input from the terminal 203, a product name code, a work type code, and a work subject code are used as key items, and a product name code, a work type of the yield master file 13 by type / work type / work subject. Information is registered (newly registered) in the code, the work subject code, the yield order, and the yield [%] (step 1001).

Similarly, based on the instruction and data input from the terminal 203, the work type code and the work subject code in the yield master file 14 for each work type / work subject are set as key items using the work type code and the work subject code as key items. , Information on the yield order and the yield [%] are registered (step 10).
02).

Further, based on the instruction input from the terminal 203 and the data input from the terminal 205, the yield control information (see FIG. 8) based on the input data is registered in the yield control master file 22 (step 1003). ). That is, based on the data input from the terminal 205, information (yield calculation information) such as a calculation method and an effective range (value swing and required minimum parameter) is registered using the product name code as a key item. Here, as the calculation method, a calculation method for obtaining an average value, a calculation method for obtaining an upper value, a calculation method for obtaining a lower value, and the like can be considered (information indicating such a calculation method is set as a “calculation method”. ).

The yield maintenance unit 20 has an update function in human-based processing as well as the above-described new registration function in human-based processing (interactive processing). According to the new registration process).

The order of the processing of steps 1001 to 1003 is arbitrary, regardless of the order of the flowchart shown in FIG.

Next, the operation at the time of updating (automatically updating) the yield master file 13 by type / work type / work subject will be described.

The yield maintenance unit 20 performs the following processing in response to a yield maintenance request instructed from the terminal 203 (FIG. 1).
0 (b)). In the yield maintenance request, the product name code and the work type code for specifying the product to be maintained and the work type are specified.

First, based on the yield maintenance request, the work order record file 21 is searched by using the product name code and the work type code as key items, and the work order record (work order number, work subject code, completion date, number of inputs) is retrieved. And the number of non-defective products) (step 1004).

In the work order record file 21, based on the data input from the terminal 204 in the process of executing the work, the work order number, the work type code, the product name code, the used work subject code, Day,
And quantity information (the number of inputs and the number of non-defective products) are stored (see FIG. 7).

Next, the yield control master file 22 is searched using the product name code as a key item, and as the yield calculation information,
Calculation method, range of values, and minimum required parameter (see Figure 8)
Is acquired (step 1005).

Based on the work order record obtained in step 1004 and the yield calculation information obtained in step 1005, the value and the number of work order records satisfy the valid range (the fluctuation range of the value and the required minimum parameter). It is determined whether or not it has been performed (step 1006).

If it is determined in step 1006 that the actual work order satisfies the effective range,
The yield is calculated by the method defined in the “calculation method” in the yield calculation information acquired in step 1005 (step 1007).

Based on the calculation result of step 1007, the yield information in the product type / work type / work subject yield master file 13 is updated using the product name code, the used work subject code and the work type code as key items (note that It is also possible to make a human-based determination intervene in the final determination as to whether or not to update (step 1008).

If it is determined in step 1006 that “the actual work order does not satisfy the effective range” or if the update in step 1008 is completed, all the products (product name codes) related to the yield maintenance request and It is determined whether or not the above processing has been completed for the work type (work type code) (step 1009).

If it is determined in step 1009 that the above-mentioned processing has not been completed for all products and work types related to the yield maintenance request, the next product name code and work type code are used as key items in step 1004.
Is repeated.

If it is determined in step 1009 that "the above process has been completed for all products and work types related to the yield maintenance request", the process shown in FIG. 10B is completed.

The yield maintenance unit 20 similarly performs the above-described update processing for the yield master file 14 for each work type / work subject. In the case of this update processing, the work type code is specified in the yield maintenance request, the yield control information in which the product name code is not specified is obtained in the processing in step 1005, and the type / work type is obtained in the processing in steps 1005 and 1008. The process is performed on the work type / work subject yield master file 14 instead of the work subject / work subject yield master file 13, and in the determination of step 1009, the end determination is performed only for the work type (work type code). Will be

In the work assignment method of the present embodiment, a machine or a worker (human) can be considered as the work subject.

[0075]

As described above, according to the present invention, when allocating the work to an appropriate one from a plurality of workers (machines or workers), each work entity represented by the yield record is assigned. In consideration of the manufacturing capacity of the work, priority is given to work with the highest yield (large) work as much as possible, so that in the work allocation result, process defects (loss) can be reduced compared to the past. In addition, it is possible to reduce the amount of work and the work time, and to suppress the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a work assignment system according to the present invention.

FIG. 2 is a diagram showing work order information in a work order file in FIG. 1;

FIG. 3 is a diagram showing work subject information in a work subject file in FIG. 1;

FIG. 4 is a diagram showing type / work type / work subject yield information in a yield master file by product type / work type / work subject in FIG. 1;

FIG. 5 is a diagram showing work type / work subject yield information in a work type / work subject yield master file in FIG. 1;

FIG. 6 is a view showing work subject assigned work order information in a work subject assigned work order file in FIG. 1;

FIG. 7 is a diagram showing work order performance information in a work order performance file in FIG.

FIG. 8 is a view showing yield control information in a yield control master file in FIG. 1;

FIG. 9 is a flowchart showing a process of a work assignment control unit in FIG. 1;

FIG. 10 is a flowchart showing processing of a yield maintenance unit in FIG. 1;

[Explanation of symbols]

 10 Work Assignment Control Unit 11 Work Order File 12 Work Subject File 13 Yield Master File by Type / Work Type / Work Subject 14 Yield Master File by Work Type / Work Subject 15 Work Order File Assigned by Work Subject 20 Yield Control Part 21 work order performance file 22 yield control master file 100 information processing device 201, 202, 203, 204, 205 terminal

Claims (6)

[Claims] 1. A work order file for managing work order information for a work to be allocated, and a plurality of work subjects capable of performing the same work are grouped, and the abilities of a plurality of work subjects belonging to each work subject group A work subject file that manages information as work subject information, a yield master file that manages the yield of each work subject by type and work type, a yield master file by work subject, and a step by work subject that is classified by work type A work master / yield master file by work type / work subject, a work subject assigned work order file to manage work order information by work subject assigned to each work subject, A work order result file for managing past work results for work orders for assigned work as work order result information, Yield control master file that manages the yield control information, and a plurality of work subjects that can be assigned to the work for the work order by searching the work order file and the work subject file based on the work order included in the work assignment request. Acquiring the work subject information, and obtaining the yield information of each of the plurality of work subjects by searching for the type / work type / work subject yield master file and the work type / work subject yield master file, The assignment status of each of the plurality of operation subjects is acquired by searching the assigned work order file according to the operation entity, and based on the acquisition of the information, the work is assigned to the operation entity having a good yield within the range of the assignment status. The work assignment control unit to be assigned, and the work order record information in the work order record file based on the yield maintenance request. To obtain a work order record, perform a yield calculation based on the work order record based on the yield control information in the yield control master file, and maintain the yield information optimally based on the calculation result. A work allocation method comprising: a yield master file for each type / work type / work subject; and a yield maintenance unit for updating the yield master file for each work type / work subject. 2. The work assignment system according to claim 1, wherein the work subject is a machine. 3. The work assignment system according to claim 1, wherein the work subject is a worker. 4. The work assignment according to claim 1, wherein the yield control information in the yield control master file has information indicating a calculation method and information indicating an effective range. method. 5. An assignment adjustment based on human-based processing is performed after assignment of tasks based on acquisition of information from the type / work type / work subject yield master file and the work type / work subject yield master file. 4. The work assignment system according to claim 1, further comprising a work assignment control unit. 6. An assignment adjustment based on a human process after assignment of work based on acquisition of information from a type / work type / work subject yield master file and a work type / work subject yield master file. The work assignment system according to claim 4, further comprising a work assignment control unit.