JP2019086954A - Work element lead time calculation device and process design support system - Google Patents

Abstract

To provide a lead time calculation device capable of correctly calculating a work element lead time.SOLUTION: A work element lead time calculation device comprises a unit work standard time database by resource use form, unit work selecting means by resource use form, and work element lead time calculating means. The unit work standard time database by resource use form holds a resource used for a work and a unit work standard time by resource use form corresponding to the unit work defined by use of the resource. The unit work selecting means by resource use form selects a unit work by resource use form constituting a prescribed work element. The work element lead time calculating means calculates the work element lead time on the basis of the unit work standard time by resource use form corresponding to the selected unit work.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a work element lead time calculation device and a process design support system.

  In the manufacturing field, such as a manufacturing industry, process design is performed based on product design information, cost planning information, etc., and a manufacturing line is built according to the information. The work elements implemented in the manufacturing line are subdivided as much as possible, and the product lead time is the sum of the time required for each work item.

  Various methods for estimating lead time have been proposed so far, but representative methods include, for example, the stopwatch method and the PTS (predetermined time standard) method. The stopwatch method measures the operation of an actual operation using a stopwatch to obtain a lead time. On the other hand, in the PTS method, human tasks are decomposed into basic motions, and predetermined time values are applied according to the nature and conditions of each basic motion, and these are totaled to estimate the working time of the task It is a method.

  A lead time calculation method classified into the PTS method is disclosed, for example, in Patent Document 1. In this technology, first, work elements are defined in terms of part types and processing forms, and a standard installation time for each part and a standard processing time for each processing form are set. Then, by specifying the part and the processing form, it is possible to estimate the lead time of the work element.

Japanese Patent Application Laid-Open No. 09-283981

  However, the technique of Patent Document 1 has a problem that the lead time of the work element may not be estimated correctly. In an actual operation, the lead time may be different even with the same parts and the same processing form. For example, if the tools used for assembly and the equipment used for processing are different, the lead time may be different even in the same assembly and processing operations.

  The present invention has been made in view of the above problems, and an object thereof is to provide a lead time calculation device capable of correctly estimating the lead time of a working element.

  In order to solve the above-mentioned subject, a work element lead time calculation device has a resource use form classified unit work standard time database, a resource use form classified unit work selection means, and a work element lead time calculation means. The resource usage type unit work standard time database holds a resource used for work and a resource usage type unit work standard time corresponding to a unit work defined by usage of the resource. The resource usage type unit work selection means selects a resource usage type unit work that constitutes a predetermined work element. The work element lead time calculation means calculates the work element lead time based on the resource usage type classified unit work standard time corresponding to the selected unit work.

  An advantage of the present invention is that it can provide a lead time calculation device capable of correctly estimating the lead time of a work element.

It is a block diagram showing a work element lead time calculation device of a 1st embodiment. It is a flowchart which shows operation | movement of the working element lead time calculation apparatus of 1st Embodiment. It is a block diagram which shows the hardware constitutions of the process design support system of 2nd Embodiment. It is a block diagram showing the detail of the process design support system of a 2nd embodiment. It is a block diagram which shows the detail of the process information storage part of 2nd Embodiment. It is a table | surface which shows one specific example of the data memorize | stored in the resource usage type unit work standard time database of 2nd Embodiment. It is a flowchart which shows operation | movement of the process design support system of 2nd Embodiment. It is a figure which shows one specific example of the hierarchy tree displayed on the display apparatus of 2nd Embodiment. It is a figure which shows an example of the process chart displayed on the display apparatus of 3rd Embodiment. It is a figure which shows another example of the process chart displayed on the display apparatus of 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the embodiments described below are technically preferable limitations for carrying out the present invention, but the scope of the invention is not limited to the following. In addition, the same number may be attached | subjected to the same component as each drawing, and description may be abbreviate | omitted.

First Embodiment
FIG. 1 is a block diagram showing a work element lead time calculation device according to this embodiment. The work element lead time calculation device has a resource usage type classified unit work standard time database 1, a resource usage type classified unit work selection means 2, and a work element lead time calculation means 3.

  Resource usage type unit work standard time database 1 holds resource usage type unit work standard time. Here, the resource usage type unit work is a resource used for work and a unit work defined by the usage of the resource, and the standard time required for this unit work is a resource usage type unit work standard time.

  The resource usage type unit work selection means 2 selects a resource usage type unit work that constitutes a predetermined work element. In general, work elements are often composed of a plurality of unit tasks, and in this case, a plurality of resource usage type unit tasks are selected.

  The work element lead time calculation means 3 calculates the work element lead time based on the selected unit work and the resource usage type unit work standard time corresponding to the selected unit work.

  FIG. 2 is a flowchart showing the operation of the work element lead time calculation device. First, a resource usage mode-specific unit work standard time determined by the resource and the usage mode of the resource is stored in the database (S1). Next, all resource usage type unit work constituting the work element is selected (S2). Then, the work element lead time is calculated based on the resource usage type unit work standard time corresponding to the selected resource usage type unit work (S3). Specifically, the work element lead time is calculated by adding up and summing up the unit operation standard time by resource usage mode corresponding to the selected unit operation and taking the sum with the total of unit operations not using resources. .

  As described above, according to the present embodiment, the working element lead time reflects the resource used for the work and the usage pattern of the resource, so that the working element lead time can be accurately calculated.

Based on the resource usage type unit work selected by the resource usage type unit work selection unit and the resource usage type unit work standard time,
And a work element lead time calculation unit for calculating a lead time of the work.

Second Embodiment
FIG. 3 is a block diagram showing the hardware configuration of the process design support system of the present embodiment. The process design support system 1000 has a storage device 1100, a central processing unit 1200, a display device 1300, and an input device 1400 as hardware. It has the same configuration as a general computer.

  FIG. 4 is a block diagram showing the process design support system 1000 in detail. In the storage device 1100, a process information storage unit 1110 and a resource usage type-based unit work standard time storage unit 1120 are mounted. In central processing unit 1200, work element setting unit 1210, resource usage type unit work selection unit 1220, work element lead time calculation unit 1230, process lead time calculation unit 1240, and display control unit 1250 are mounted. ing. The display control unit 1250 has a function of performing control to hierarchically display processes, work elements, parts, and resources.

  FIG. 5 is a block diagram showing the process information storage unit 1110 in detail. The process information storage unit 1110 has a work element storage unit 1111, a used component storage unit 1112 and a resource usage type unit work storage unit 1113.

  The work element storage unit 1111 stores work elements constituting each process in association with the process. The used component storage unit 1112 associates and stores the component used in the work element with the work element. The resource usage type unit work storage unit 1113 stores the resource usage type unit work related to the part to be used in association with the part.

  FIG. 6 is a table showing an example of data stored in the resource usage type unit work standard time database. This table describes the resource name and the unit work standard time using this resource. The unit work standard time is determined for each usage if the same resource is used differently. Note that the unit work standard time for unit work not using resources may be held in this database. Also, in the following description, resource usage type unit work may be referred to as unit work.

  FIG. 7 is a flowchart showing the operation of the process design support system. First, with reference to the work elements stored in the work element storage unit, the work elements constituting the process are set (S101). Next, with reference to the work elements stored in the work element storage unit, parts to be used in each work element are set (S102). Then, unit work related to each part is set (S103). Next, referring to the resource usage type unit work storage unit, the resource usage type unit work standard time is associated with each unit work (S104). Next, the lead time of each work element is calculated based on the resource usage type unit work standard time that has been linked (S105). Specifically, the task element lead time can be obtained by adding up and summing up the resource usage type unit work standard time corresponding to the linked unit work and taking the sum with the total of the unit work not using resources. It is calculated. Then, the process lead time is calculated using all the work element lead times (S106). Next, the process, work elements, parts, and resources are hierarchically displayed on the display device (S107). At this time, not all may be displayed at once, but the lower layer may be displayed when the upper layer is expanded.

  FIG. 8 is a diagram showing a specific example of the process hierarchy tree displayed on the display device. The process name, work place, work target (parts), and resources are displayed in a hierarchical tree. This display is similar to that used in BOP (Bill of Process). Here, the above-described work elements correspond to work objects (parts). The lead time of the work related to each part which is the work element is calculated by the above-mentioned method, and the accumulated result is the work time at each work point. In addition, details of the resource are not displayed, and when the icon of the resource is clicked, the resource, the usage pattern, and the applied resource usage type unit work standard time are displayed.

  Also, although not shown, it is possible to edit the resource usage type unit work standard time applied to the resource section or edit the resource usage type unit work standard time database using the input device. May be

(Example)
Below, the Example which calculates | requires the work element lead time of patent document 1 is described. The part B in FIG. 8 is a thin attached part such as a seal, and the resources used in the operation are tweezers as the operation element. This work element consists of three unit work of (1) taking tweezers, (2) sticking parts with tweezers, and (3) putting tweezers. Each unit work standard time is (1) + (2) + (3) = 1.0 + 2.0 + 1.0 = 4.0 seconds from the table of FIG. In this manner, the work element lead time can be calculated in accordance with the actual work content.

  A program that causes a computer to execute the process of the first or second embodiment described above and a recording medium storing the program are also included in the scope of the present invention. As a recording medium, for example, a magnetic disk, a magnetic tape, an optical disk, a magneto-optical disk, a semiconductor memory, or the like can be used.

Third Embodiment
In addition to the tree display of the second embodiment, work places and work elements are arranged in the horizontal direction, and contents and related information of each work element are arranged in the vertical direction. It is also possible to display the process chart in a grid form. FIG. 9 is a diagram showing an example of such a process chart.

  In the process chart of FIG. 9, the divisions are provided for each work place and arranged side by side, and the contents of the work targets to be implemented in the work place are displayed vertically side by side. In the lower part, the working time of each working place is displayed as a "design value". The work time for each work place is the sum of the lead times of the work targets (work elements) to be implemented in the place. The work target or the contents of the work target can be added / deleted.

  From the above design values, it is possible to determine the cycle time balance of the production line and to identify the work place that is the bottleneck. Here, the working time of the work place 3 is the longest and becomes a neck process. Work targets can be moved / replaced within or between work places. In the example of FIG. 9, an example of the operation of moving the work element forming the part G from the back of the fastening operation of the part F to the front is indicated by a block arrow.

  Since the operation as described above is possible, it is possible to balance the cycle time by moving / replacing the work target at the work place that is the bottleneck. When movement / replacement of work targets is performed, the work time of each work place is recalculated, and cycle time balance can be revalidated. The changed content is also reflected on the BOP side. FIG. 10 is a diagram showing a process chart in which the moving operation of the work object is added to the process chart of FIG. 9. In the example of FIG. 10, the work of assembling the parts G is transferred from the work place 3 which is the neck in FIG. 9 to the work place 2 where the working time is short. By this movement, the working time of the working place 3 is shortened from 16 seconds to 13 seconds, and the working time of the working place 2 is extended from 10 seconds to 13 seconds. As a result, each work time can be made close to the target cycle time of 14 seconds.

  In addition, each work target can input and display details of the work content including the handling of resources. In the example of FIG. 10, when the icon of the work element "paste" is clicked, the unit work constituting the work element and each standard time are displayed. The lead time of this work element is the sum of each unit work time. Here, each unit work standard time reflects the usage pattern of the tool or resource described in the first and second embodiments. In the example of FIG. 10, this is applied to a unit work that constitutes a work of sticking using tweezers.

  In the bottom row of the process chart, the "measured value" of the working time is displayed. By arranging and displaying the design value and the actual measurement value, comparison between the “design value” and the “actual measurement value” is facilitated. In this display, when there is a difference between the design value and the actual measurement value, the problem can be clarified and the work improvement can be performed by analyzing the details of the work element.

  The present invention has been described above by taking the above-described embodiment as an exemplary example. However, the present invention is not limited to the above embodiment. That is, the present invention can apply various aspects that can be understood by those skilled in the art within the scope of the present invention.

1 Resource Usage Mode Unit Work Standard Time Database 2 Resource Usage Mode Unit Work Selection Means 3 Work Element Lead Time Calculation Means 1000 Process Design Support System 1100 Storage 1110 Process Information Storage Unit 1120 Resource Usage Mode Unit Work Standard Time Storage Unit 1200 central processing unit 1210 work element setting unit 1220 unit work selection unit according to resource usage 1230 work element lead time calculation unit 1240 process lead time calculation unit 1250 display control unit 1300 display device 1400 input device

Claims (10)

A resource usage type unit work standard time which is a standard time required for a resource usage type specific unit work defined by a resource used for a predetermined unit work and the usage of the resource A resource usage type unit work standard time database and ,
Resource usage type unit work selection means for selecting the resource usage type unit work that constitutes a predetermined work element;
Based on the resource usage type unit work selected by the resource usage type unit work selection means and the resource usage type unit work standard time,
And a work element lead time calculation unit that calculates a work element lead time of the work element. The work element lead time calculation device according to claim 1;
A work element setting unit that classifies a process of producing a product or the like into a plurality of the work elements;
Process lead time calculation means for calculating the lead time of the process based on the work element lead time;
A process design support system, wherein the work element lead time calculation device calculates a work element lead time of each of the work elements. The process design support system according to claim 2, further comprising display means for hierarchical tree display of the process, the work element, and a part used in the work element. 4. The process design support system according to claim 3, wherein the display means displays the hierarchical tree display in a hierarchy that expands in the horizontal direction of the screen. The resource usage type-based unit work display means for displaying the resource usage type-based unit work applied to the component by being linked to the component used in the work element. Process design support system according to one item. The process design support system according to any one of claims 2 to 5, further comprising a resource usage type unit work standard time database editing unit that edits the resource usage type unit work standard time database. A resource usage type-specific unit work standard time required for a resource usage type-specific unit work defined by a resource used for a predetermined unit work and the usage of the resource is stored,
Select the resource usage mode unit work that constitutes a predetermined work element,
A work element lead time calculation method, comprising: calculating a work element lead time of the work element based on the selected resource usage type unit work and the resource usage type unit work standard time. Classify the process of producing products etc. into a plurality of the above-mentioned work elements,
The work element lead time of each of the work elements is calculated using the work element lead time calculation method according to claim 7;
A control method of a process design support system, wherein a process lead time of the process is calculated based on the work element lead time. The control method of the process design support system according to claim 8, wherein the process, the work element, and the parts used in the work element are displayed in a hierarchical tree. Storing a resource usage type-specific unit work standard time required for a resource usage type-specific unit work defined by a resource used for a predetermined work element and the usage of the resource;
Selecting the resource usage type unit work constituting the work element;
Calculating a lead time of the work element based on the selected resource usage type unit work and the selected resource usage mode unit work standard time; and a work element lead time calculation program.

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