JP2003036291A - Product cost estimation method and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cost estimation method and system that allows a designer to estimate the cost of a product, such as an electronic device, starting with the design stage. SOLUTION: This is a product cost estimation method and system which estimate the cost of the product in response to the input of design-drawing identification data on a product. Corresponding to design-drawing identification data on the product, the system holds design information data, including the part types of parts specified on the design drawing and the process types (machining, assembly, and test) of the parts. The system also holds estimation conditions including part unit prices of the part types as well as the standard man-hours and the man-hour unit prices of the process types. In response to the input of design-drawing identification data on the product, the system adds up the part unit prices corresponding to part types included in the corresponding design information data for the number of required parts to calculate the total member cost, and the system also adds up the standard man-hours corresponding to the process types included in the corresponding design information data to calculate the total man-hours. The system then multiplies the calculated total man-hours by the man-hour unit price for conversion to the process cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product cost estimation method and system for estimating the cost of products such as electronic devices.

[0002]

2. Description of the Related Art Conventionally, the manufacturing cost of an electronic device product is generally estimated only after the design department issues a formal product drawing to the factory after design and development, and mass production trials are performed at the factory. It was target. Therefore, even if it was found that the product cost was higher than the target cost at the time of mass-production trial production, the design change could not be made in time and the high cost had to be mass-produced. In order to avoid such cost estimation that is delayed in time, it is conceivable to perform cost estimation early in the design and development stage. However, because there is no means to easily estimate the cost in such a design stage, and sufficient design reviews that consider the target cost cannot be performed, there are frequent design changes for cost reduction after the start of mass production, which leads to capital investment, such as molds. It wasted money and time on investment and product evaluation.

As a method for solving such a problem, Japanese Patent Laid-Open No. 8-50610 discloses a method of estimating a standard time for each step in the assembly process and inspection process of a device such as an information processing device. However, in such a method, it is difficult to estimate at the design and development stage because a product drawing is required for performing the estimation. Further, Japanese Patent Laid-Open No. 11-120249 discloses an estimate design support device for plant products.
However, such an apparatus can estimate the material cost or the component cost for the purpose of promptly presenting the estimate to the customer in accordance with the confirmation of the customer's required specifications of the product to be estimated. It was difficult to calculate the cost by adding the processing man-hours at the stage and the man-hour estimation such as the function inspection peculiar to electronic equipment.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a product cost estimation method and system which enables cost estimation of products such as electronic devices from the design stage.

[0005]

A product cost estimation method according to the present invention is a product cost estimation method for estimating the cost of a product according to input of identification data of a design drawing of the product,
Design information data holding design information data including the component type of the component defined in the design drawing and the process type of the machining, assembly, and test process of the component corresponding to the identification data of the design drawing of the product A holding step, a quotation condition holding step of holding a quotation condition including a component unit price corresponding to the component type, and a standard man-hour and a unit price of the process corresponding to the process type, and inputting identification data of design drawings of the product. According to the input of the component cost totaling step of totaling the component cost by adding up the component unit prices corresponding to the component types of the corresponding design information data according to the number of components, and the identification data of the design drawing of the product. , A total man-hour totaling step of totaling the total man-hours by adding up the standard man-hours corresponding to the process type of the corresponding design information data, and multiplying the total man-hours by the total man-hour unit price. Characterized in that it comprises a processing cost conversion step of converting the processing costs.

The product cost estimation system according to the present invention is
A product cost estimation system that estimates the cost of the product in response to the input of identification data of the design drawing of the product, and corresponds to the identification data of the design drawing of the product, and the part type of the part specified in the design drawing. , Design information data holding means for holding design information data including process types of the parts processing, assembling and testing processes, a unit price of the parts corresponding to the type of parts, and a standard man-hour and a unit price of man-hours corresponding to the process types. According to the input of the identification condition data of the design drawing of the product and the estimation condition holding means for holding the estimation conditions including the above, the component unit price corresponding to the component type of the corresponding design information data is added according to the number of components. According to the input of identification data of the design drawing of the product, the standard man-hour corresponding to the process type of the corresponding design information data is added up according to the number of processes, and the total is calculated. Work The total man-hours collecting unit to aggregate, characterized in that it comprises a processing cost converting means for converting the processing costs by multiplying the 該工 number bid total man-hours that is the aggregate.

[0007]

FIG. 1 shows an embodiment of the present invention.
The structure of the product cost estimation system is shown. here,
The product cost estimation system 1 includes a sheet metal part cost estimation program 2 and a printed wiring board assembly man-hour estimation program 3.
, BWB (Back Wiring Board) assembly man-hour estimation program 4, cable assembly man-hour estimation program 5, device assembly man-hour estimation program 6, and board and device inspection man-hours for estimating the inspection man-hours of the printed wiring board and the device on which electronic parts are mounted. It comprises an estimation program 7 and a total cost estimation program 8 for totaling the man-hours, converting the processing cost, and accumulating the component cost of the used parts based on the estimation results of the above programs.

The product cost estimation system 1 further includes an estimation result database 9 for storing estimation results, product specifications,
A design information database 10 that stores design drawings, a parts composition table, and inspection item data, and specifications and performance of electrical parts.
A parts information database 11 that stores shape and size data, a parts unit price database 12 that stores parts unit price data that has been purchased, and a man-hour results database 1 that stores actual data of assembly and inspection man-hours for each product or part.
3 and a man-hour unit price database 14 that stores work unit price data per man-hour. Design information database 10
Performs, for example, product design of electronic devices, that is, device design, mounting design, board design, test design, etc., using the designing CAD terminal 21, and design drawings of the product, component parts list of electrical parts and mechanical parts Design information such as mechanical part type inspection items is registered and stored in association with the design drawing number. At this time, it is possible to register even those that are in the process of design and development. The component unit price database 12, the man-hour performance database 13, and the man-hour unit price database 14 can be registered or modified by the management terminal 22.

It is preferable that the product cost estimation system 1 is mounted on a CAD terminal for a designer to design an electronic device product to enable the cost estimation work in parallel with the design work or continuously. Alternatively, it may be implemented in a separate computer. FIG. 2 shows a configuration example of the design information database 10. Here, the design information data is managed using the identification data of the design drawing, for example, the drawing number as a key. Such identification data may be managed using the article number of the product or the part module as a key. As shown in FIG. 2, the design information of the sheet metal part includes design information such as dimensions, materials, processing methods, and surface treatment methods. The design information of the printed wiring assembly process includes information of the component mounting process. The design information of the BWB assembly man-hour includes information on the connector and contact mounting and the reinforcing metal fitting process. The design information of the cable assembling process includes information such as wire shape, connector contact, incidental work such as tie wrap fixing, marking, shrink tube attachment and the like. The design information of the device assembling process includes information such as screw type, label type, cable type, and special type component type and component fastening method, for example, screw tightening, rivet, bonding and other information. The design information of the board test process includes inspection items for a single printed wiring board on which electronic components are mounted, such as information on initial operation confirmation, main signal continuity test, alarm operation test, and power supply test. The design information of the product test process includes information on the inspection items of the device in the final product state, for example, an alarm test, a main signal continuity test, a common part switching test, a LOOP test, and a line test.

FIG. 3 shows an example of the structure of the estimation condition database 15. Here, the standard man-hour for each process of the sheet metal part, that is, the processing standard time Hs (Hours of Standard) and the assembly standard time Hs are defined in the unit mH (mHours).
The standard time is a time required for a standard worker to perform a normal work in each process of processing, assembling or inspection based on the WF (WorkFactor) method, and is based on the analysis and actual measurement of the motions constituting each process. It is determined by.
In addition, not only a simple total calculation formula but also a calculation formula weighted for each process may be defined and used in the present estimation condition database 15 for the totalization of the standard time over all processes.

FIG. 4 shows a basic processing procedure in the product cost estimation system 1. When the product cost estimation system 1 is started, a selection screen (menu) for selecting each estimation program as an initial screen is displayed on the terminal, for example,
It is sent to the design CAD terminal 21 (step S1).
On the other hand, the operator of the design CAD terminal 21 selects an arbitrary program, so that the sheet metal part cost estimation program 2, the printed wiring board assembly man-hour estimation program 3, and the BWB (Back Wiring Board) assembly man-hour estimation program 4, the cable assembly man-hour estimation program 5, the device assembly man-hour estimation program 6, the board / device inspection man-hour estimation program 7, and the total cost estimation program 8 can be separately activated (steps S2 to S8). ). Normally, the total cost estimation program 8 is finally activated and executed to obtain the estimation result, and the termination can be instructed (step S9). Alternatively, each program can be executed again.

FIG. 5 shows a common processing procedure of each estimation program. These processes include a sheet metal part cost estimation program 2, a printed wiring board assembly man-hour estimation program 3, a BWB assembly man-hour estimation program 4, a cable assembly man-hour estimation program 5, a device assembly man-hour estimation program 6, a board and a device. The same applies to the inspection man-hour estimation program 7.

First, the drawing number input from the operator is accepted (step S11). Next, according to the drawing number, each estimation program of the cost estimation system 1 fetches the design information data corresponding to the drawing number from the design information database 10 (step S12). Next, according to the estimation instruction operation by the operator, the component unit prices corresponding to the component types of the design information data are added up according to the number of components to total the component cost (step S13). The component unit price is fetched by referring to the component unit price database 12. Then, the standard man-hours corresponding to the process type of the design information data are added up according to the number of processes to total the total man-hours (step S14). The standard man-hours are fetched by referring to the estimation condition database 15. Alternatively, the actual man-hours in the man-hour performance database 13 may be referred to.

Next, the estimation result is displayed on the operator's terminal (step S15). Wait for a review instruction from the operator (step S16), and if there is a review, accept the change of the design information data from the operator (step S16).
17) and returns to step S13. If there is no review, the estimation result is saved and stored in the estimation result database 9 (step S18).

FIG. 6 shows a drawing number input screen of the sheet metal part cost estimate program 2 as an example of the drawing number input screen of this embodiment. The input screen includes a drawing number input field 61, an estimate execution button 62, a read button 63 for instructing to import design information necessary for an estimate corresponding to the drawing number from the design information database, and a design information display field. 64
Including and

The operator inputs the drawing number into the drawing number input field 61.
To input the read button 63. In response to this, the design information is displayed in the design information display field 64, and the operator visually confirms the information and then issues the estimate by executing the estimate execution button 62. Design information display column 6
In addition to the information display, the operation of changing the contents of the design information may be possible. This allows the operator to temporarily change the result of design review from the estimation result and recalculate the estimation. For example, the estimate can be recalculated by changing the material from stainless steel to an iron-based member.

FIG. 7 shows an example of an estimation result screen obtained as a result of the estimation instruction on the input screen shown in FIG. The estimate result screen includes a drawing number display field 71 for displaying the drawing number and a unit price display field 72 for displaying an estimated unit price obtained as a result of the aggregation.
And a man-hour estimate breakdown display field 73. The man-hour estimate breakdown display column 73 shows the details of the manufacturing man-hours of the manufactured parts specified in the drawing, and shows the corresponding man-hours in mH.
The displayed estimation result is saved and stored in the estimation result database 9 by operating the DB registration button 74.

FIG. 8 shows an example of the drawing number input screen. This screen displays a printed wiring board assembly man-hour estimation program 3, a BWB (Back Wiring Board) assembly man-hour estimation program 4, a cable assembly man-hour estimation program 5, a device assembly man-hour estimation program 6, a board / device inspection man-hour estimation program. 7 and 7 are commonly used.

Here, the drawing number is entered in the drawing number input field 81. Preferably, a detailed breakdown of the parts constituting the product or part module corresponding to the drawing may be displayed in the component display field 82. The estimation is executed when the operator designates the total button 83. FIG. 9 shows a screen example of the man-hour estimation result screen.

Here, details of the processing man-hours of the product or component module corresponding to the drawing displayed in the drawing number display field 91 are displayed, and the total man-hour Hn (Hour (Hour
s of Net) and Hs (Hours of Standard) are displayed. When the operator operates the registration button 93, the estimation result is stored and recorded in the estimation result database 9.

FIG. 10 shows an example of the estimation result screen of the total cost estimation program. Here, the result screen includes a drawing number display field 101, and below, a detailed breakdown 102 of the member components of the article corresponding to the drawing and the processing step.
Is displayed. In the portion of the estimated Hs of the detailed breakdown 102, the man-hours of the estimation result from the board / device inspection man-hour estimation program 7, the printed wiring board assembly man-hour estimation program 3, the BWB assembly man-hour estimation program 4, and the cable assembly man-hour estimation program 5 are displayed. , 200, 100, 100 and 100
As described above, each is read out from the estimation result database 9 and displayed (reference numeral 104 portion). The member cost from the sheet metal part quotation program 2 is displayed in the quotation unit price column as 1000 yen (reference numeral 105).

By manipulating the calculation button 106 by the operator, the man-hour estimation result is aggregated to 500 mH, and by referring to the man-hour unit price database 14, the processing cost conversion result is displayed as 1500 yen. Result is 1
It is displayed as 000 yen (reference numeral 107 portion). In addition, referring to the man-hour performance database 13, the actual man-hours of the process,
It is also possible to display the current man-hours and use it as reference information for the operator (reference numeral 103).

As described above, according to the cost estimation system in this embodiment, various estimation programs and design information,
By constructing a system that links part information, part unit price, actual man-hours, and man-hour unit price database, designers can assign necessary information by numbering drawing numbers even for products that are in the process of designing at the design development stage. If you register it in the design information database, you can use this system to immediately grasp the product cost (material cost + processing cost) that you designed.

[0024]

As described above, by the product cost estimation method and system according to the present invention, by designating the design drawing number obtained at the design stage, the component cost and the processing cost incurred from the manufacturing to the test process are calculated. The cost of the product can be estimated at the product design stage.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a product cost estimation system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of a design information database according to the present embodiment.

FIG. 3 is a diagram showing a configuration example of an estimation condition database in the present embodiment.

FIG. 4 is a flowchart showing a processing procedure of a product cost estimation system.

FIG. 5 is a flowchart showing a basic processing procedure common to each program constituting the product cost estimation system.

FIG. 6 is a diagram showing a drawing number input screen in the sheet metal part cost estimation program.

FIG. 7 is a diagram showing an estimation result screen in a sheet metal part cost estimation program.

FIG. 8 is a diagram showing a drawing number input screen in each estimation program.

FIG. 9 is a diagram showing an estimation result screen in each estimation program.

FIG. 10 is a diagram showing an estimation result screen in the total cost estimation program.

[Explanation of symbols]

1 Cost estimation system 2 Sheet metal parts cost estimation program 3 Printed wiring board assembly man-hour estimation program 4 BWB assembly man-hour estimation program 5 Cable assembly man-hour estimation program 6 Equipment assembly man-hour estimation program 7 Board and equipment inspection man-hour estimation program 8 Total cost estimation program 9 Estimate result database (DB) 10 Design information database (DB) 11 Parts information database (DB) 12 Parts unit price database (DB) 13 Effort result database (DB) 14 Man-hour unit price database (DB) 21 CAD terminal for design 22 Management terminal

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tsutomu Imoto             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. (72) Inventor Seiichi Sakurai             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. (72) Inventor Osamu Okada             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. (72) Inventor Shigeru Maenozono             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. (72) Inventor Masao Izumi             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. (72) Inventor Osamu Takahashi             1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric             Industry Co., Ltd. F-term (reference) 5B046 DA01 HA05 KA05

Claims (2)

[Claims] 1. A product cost estimation method for estimating the cost of the product in response to input of identification data of the design drawing of the product, which is defined in the design drawing in correspondence with the identification data of the design drawing of the product. Parts type and processing of the parts,
A design information data holding step of holding design information data including process types of assembly and test processes, a part unit price corresponding to the part type, a standard man-hour corresponding to the process type, and an estimation condition including a man-hour unit price. According to the estimation condition holding step to hold and the input of the identification data of the design drawing of the product, the component unit price corresponding to the component type of the corresponding design information data is added up according to the number of components to total the component cost. Total man-hours for totaling the total man-hours by adding up the standard man-hours corresponding to the process type of the corresponding design information data in accordance with the input of the component cost totaling step and the identification data of the design drawing of the product. A product cost estimation step comprising: a totaling step; and a processing cost conversion step of converting the totalized total man-hours into a processing cost by multiplying the man-hour unit price. Method. 2. A product cost estimation system for estimating the cost of the product according to the input of identification data of the design drawing of the product, which is defined in the design drawing corresponding to the identification data of the design drawing of the product. Parts type and processing of the parts,
Design information data holding means for holding design information data including the process type of the assembly and test process, a part unit price corresponding to the part type, and an estimation condition including a standard man-hour and a man-hour unit price corresponding to the process type. According to the estimation condition holding means for holding and the input of the identification data of the design drawing of the product, the component unit prices corresponding to the component types of the corresponding design information data are added up according to the number of components to total the component cost. According to the input of the component cost totaling means and the identification data of the design drawing of the product, the standard man-hours corresponding to the process type of the corresponding design information data are added up in accordance with the number of processes to total the total man-hours. A product cost estimation system comprising: an aggregating means; and a processing cost converting means for converting the totalized man-hours into a processing cost by multiplying the man-hour unit price.