JP2004110570A - Cost estimation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cost estimation system for finding cost with respect to each of a plurality of components constituting a product by a rough estimation, and also performing a detailed estimation with respect to a necessary component. <P>SOLUTION: The cost estimation system 10 is provided with a rough cost estimation device 20 and a detailed cost estimation device 40. The rough cost estimation device is provided with a component cost on the basis of past results with respect to each of a plurality of components constituting the product and a cost results database 22 storing a first cost data indicating an assembly cost required for assembling the plurality of components based on the past results. The detailed cost estimation device automatically computes a second cost based on modification of at least either one condition of a material, shape or processing method with respect to each of the plurality of components. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cost estimation system.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a large plant such as a thermal power plant, a nuclear power plant, and a chemical plant, cost estimation including manufacturing cost and assembly cost of parts constituting a product has been performed.
[0003]
When estimating the cost, an estimate is made based on past results.
Further, cost management that is more detailed than the cost obtained by the estimation is separately performed by inputting parameters into an approximate expression or software.
Conventionally, a system for estimating costs by rough estimation and a system for estimating detailed costs are separate systems, which are inconvenient for users.
[0004]
Note that Japanese Patent Application Laid-Open No. 2001-265825 describes the following cost estimation method. The cost estimation method is based on the design information of the product to be estimated created by the CAD system, the geometric information such as dimensions, area, volume, etc., and the attribute information of parts such as material material are taken as the cost estimation factor and the list is taken. In addition to displaying, if necessary, the estimate operator acquires the value of the cost estimation factor using the automatic information acquisition function by the CAD system, and then gives an estimate execution instruction, thereby calculating the cost based on the estimated factor information. Is performed.
[0005]
[Patent Document 1]
JP 2001-265825 A (FIG. 1)
[0006]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a cost estimation system capable of estimating a cost for each of a plurality of parts constituting a product by rough estimation and estimating a detailed cost of a necessary part.
Another object of the present invention is to estimate the cost of each of a plurality of parts constituting a product by rough estimation, to perform a detailed cost estimation for a necessary part, and to further require the precision of the detailed cost. An object of the present invention is to provide a cost estimation system capable of performing estimation within a range of accuracy.
[0007]
[Means for Solving the Problems]
Hereinafter, [Means for Solving the Problems] will be described using the numbers and symbols used in [Embodiments of the Invention]. These numbers and symbols are added to clarify the correspondence between the description of [Claims] and the description of [Embodiments of the Invention]. It should not be used to interpret the technical scope of the described invention.
[0008]
A cost estimating system (10) of the present invention is a cost estimating system (10) including an approximate cost estimating device (20) and a detailed cost estimating device (40), wherein the approximate cost estimating device (20) is A cost record in which component costs based on past results for each of a plurality of components constituting a product and first cost data indicating assembly costs required for assembling the plurality of components based on past results are stored. A database (22), wherein the detailed cost estimating device (40) automatically calculates a second cost according to a change in at least one condition of a material, a shape, and a processing method for each of the plurality of parts. calculate.
[0009]
The approximate cost estimating device (20) includes a parts database (21) storing parts table data indicating a relationship between a product and a plurality of parts constituting the products, and a part database (21) of the parts included in the parts table data. A cost performance database (22) storing component costs based on past performance and first cost data indicating assembly costs required for assembling the plurality of components based on past performance is provided.
[0010]
In the cost estimation system (10) of the present invention, the detailed cost estimation device (40) calculates the second cost for a part of the plurality of parts specified by the user.
[0011]
In the cost estimation system (10) of the present invention, the detailed cost estimation device (40) calculates the second cost for a part of the plurality of parts specified by a user.
[0012]
In the cost estimation system (10) of the present invention, the detailed cost estimation device (40) includes a material database (51) indicating a relationship between weight and cost for each of a plurality of materials with respect to the material as the condition. ing.
[0013]
In the cost estimating system (10) of the present invention, the detailed cost estimating device (40) includes a plurality of processes for each of the plurality of components, and a change of each of the plurality of processes and each of the plurality of processes. Accordingly, a process master database (54) is provided which indicates the relationship between the cost and the cost of the used equipment when the used equipment is changed.
[0014]
In the cost estimating system of the present invention, the detailed cost estimating device (40) further includes a parameter value for a specific processing mode of each of the plurality of processes and a cost according to the parameter value. A processing database (55) indicating the relationship is provided.
[0015]
In the cost estimation system according to the present invention, the detailed cost estimation device (40) obtains the weight of the component from a volume corresponding to the shape of the component changed on the CAD device, and refers to the material database (51). Then, the cost of the component is determined based on the determined weight.
[0016]
In the cost estimating system according to the present invention, the detailed cost estimating device (40) includes an assembly master database (57) storing data indicating work contents and work procedures for each of the plurality of parts, A device (80), wherein the assembly cost estimating device (80) is configured to store the part based on the work content and the data indicating the work procedure for the part stored in the assembly master database (57). The workability at the time of assembling is obtained, and the assembly cost of the component is obtained based on the workability obtained.
[0017]
In the cost estimation system of the present invention, the assembly cost estimation device (80) obtains the work procedure that improves the workability based on the assembly cost corresponding to the work procedure.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a cost estimation system according to the present invention will be described with reference to the accompanying drawings.
[0019]
As shown in FIG. 1, the cost estimation system 10 of the present embodiment is obtained by integrating an approximate cost estimation system 20 and a detailed cost estimation system 40.
[0020]
The approximate cost estimation system 20 is connected to a design BOM (Bill Of Material: parts list having a tree structure) database 21 and a cost actual database 22. The cost record database 22 stores data on the cost of each component and the assembly cost of a plurality of components based on past records.
[0021]
When the user wants to obtain an estimate of the overall cost of a certain final product, the user inputs an ID indicating the final product to the approximate cost estimation system 20.
[0022]
Here, it is assumed that the final product is, for example, a gas turbine 501G. When the ID of the gas turbine 501G is input, the approximate cost estimation system 20 accesses the database 21 of the design BOM, and inputs data indicating the hierarchical (tree) structure of the components constituting the gas turbine 501G. As a result, as shown in FIG. 2, in the approximate cost estimation system 20, the components constituting the gas turbine 501G include the casing 1, the rotor 2, and so on. 11, the B component 12, and the C component 13, and the rotor 2 includes the E component 21 a, the F component 22 a, the G component 23 a.
[0023]
Next, as shown in FIG. 1, the approximate cost estimation system 20 accesses the cost actual database 22 to calculate the costs of the parts A to C11 to 13 and E to G21a to 23a. , The data indicating the assembly costs required for assembling the parts A to C 11 to 13 and E to G 21 a to 23 a. Thereby, in the approximate cost estimation system 20, it is understood that the approximate cost of the casing 1 is a value obtained by adding the assembly costs of the A to C parts 11 to 13 to the total of the costs of the A to C parts 11 to 13, Similarly, it can be seen that the approximate cost of the rotor 2 is a value obtained by adding the assembly costs of the E to G parts 21a to 23a to the total costs of the E to G parts 21a to 23a.
[0024]
The detailed cost estimation system 40 shown in FIG. 3 is capable of calculating detailed costs of the parts 11 to 13, 21a to 23a... Shown in FIG. The detailed cost of each of the parts 11 to 13, 21a to 23a,... Is automatically calculated according to the change of various conditions of the part. As shown in FIG. 3, in the detailed cost estimation system 40, conditions that can be changed are listed as change items 41 and include “material” 42, “shape” 43, “processing method” 44, and the like. I have.
[0025]
As shown in FIG. 1, the detailed cost estimation system 40 is provided with a material database 51, a shape change system 52, and a process change system 53.
The material database 51 shows the relationship between weight and cost for various materials (material A, material B, material C) as shown in FIG.
As shown in FIG. 1, the process change system 53 includes a process master database 54 and a processing database 55.
[0026]
As shown in FIG. 3, in the detailed cost estimation system 40, for example, when the user selects the “material” 42 of the change item 41 for the A part 11, the material list 42a is displayed to the user. In the material list 42a, for example, material names such as stainless steel 42a-1 and titanium 42a-2 are described. When the user selects a certain material from the material list 42a, the detailed cost estimation system 40 accesses the material database 51, refers to the data of the selected material, and calculates the weight of the A part 11 currently targeted. In light of this, the cost of the A part whose material has been changed is automatically determined (see FIG. 3). The calculated cost of the A component 11 is reflected so as to be updated with respect to the estimated cost of the A component 11 in the approximate cost estimation system 20.
[0027]
In the detailed cost estimation system 40, for example, when the user selects the “machining method” 44 in the change item list 41 for the A part 11, the process change system 53 starts. As shown in FIG. 4, the process change system 53 accesses the process master database 54 and indicates to the user the process procedure of the currently targeted A part 11. Here, as shown in the first process procedure list 53-1 in the process master database 54, the process procedure of the A part 11 first performs the marking process (01), and then performs the forging process (02). Suppose that it is set to perform the outer surface processing (03), and then perform the drilling processing (04).
[0028]
In this case, reference numerals indicating the equipment used for performing each step are shown. The relationship between the code and the processing method (step) is defined in the processing method list 53a. That is, T indicating that a forging press is used is attached to the forging step (02), and L indicating that a lathe is used is attached to the outer surface processing step (03). The machining method list 53a also lists, for example, boring B, milling M, milling F, and the like.
[0029]
The user is shown in the second process procedure list 53-2 instead of the forging (02) and the outer surface processing (03) among the processes for the A part 11 shown in the first process procedure list 53-1. It is assumed that the processing method is changed so that only the outer surface processing (02) is performed. The process database 54 defines the relationship between the processing method and the cost required for the equipment used.
[0030]
When the processing method is changed by the user, the detailed cost estimation system 40 automatically calculates the cost of the A component 11 while referring to the process database 54 based on the change in the equipment used in accordance with the change in the processing method. . As a result, the cost of the A part 11 is changed according to the equipment used for processing the A part 11. The calculated cost of the A component 11 is reflected so as to be updated with respect to the estimated cost of the A component 11 in the approximate cost estimation system 20.
[0031]
In the detailed cost estimation system 40, the user inputs detailed data for each processing method, for example, for the A part 11. As shown by reference numeral 55a, as the detailed data, for example, when the equipment used in the processing method is a lathe (L), the number of steps, length, tolerance, accuracy, surface roughness, excess thickness, These are parameters for specific processing modes such as a hole length, a hole diameter, the number of chamfers, and the number of thread cuts, and the user inputs parameters for each of these items. For example, as shown in FIG. 4, the cost of any of the materials A, B, and C is higher as the tolerance is smaller, and the cost is lower as the tolerance is larger.
[0032]
The processing database 55 stores data indicating the relationship between the equipment used (processing method), detailed data (in the above example, the number of steps, length, etc.) and the cost, based on past results. The detailed cost estimation system 40 accesses the processing database 55 and calculates the cost of the A part 11 based on the equipment used and the detailed data. The calculated cost of the A component 11 is reflected so as to be updated with respect to the estimated cost of the A component 11 in the approximate cost estimation system 20.
[0033]
As shown in FIG. 3, in the detailed cost estimation system 40, when the user selects “shape” 43 in the change item list 41 for, for example, the A component 11, the shape change system 52 starts. As shown in FIG. 5, the shape changing system 52 activates the CAD 90 associated with the shape changing system 52, and displays the shape of the A component 11 on the CAD 90 (see reference numeral 52a). Reference numeral 52a indicates the shape of the A component 11 originally created on the CAD 90 or stored in advance. The user changes the shape indicated by reference numeral 52a of the A component 11 on the CAD 90 as indicated by reference numeral 52b.
[0034]
The shape changing system 52 automatically calculates the volume, the number of steps, the length, and the like of the A component 11 based on the CAD information of the A component 11 after the change. Further, the shape changing system 52 calculates the weight of the A part 11 from the obtained volume of the A part 11. As shown in FIG. 5, the shape changing system 52 refers to the material database 11 and automatically determines the cost of the A part 11 from the weight of the A part 11 calculated by the calculation. The calculated cost of the A component 11 is reflected so as to be updated with respect to the estimated cost of the A component 11 in the approximate cost estimation system 20.
[0035]
Next, referring to FIG. 1 and FIG. 6, the detailed cost of an assembly (consisting of a plurality of parts 11 to 13, 21a to 23a...) Such as the casing 1 or the rotor 2 is newly calculated. The case will be described.
[0036]
The assembly cost estimation system 80 calculates the cost (assembly cost) of assembling the assembled product (for example, the rotor 2). In the approximate cost estimation system 20, when the user clicks the rotor 2 in the hierarchical diagram on the screen, the cost calculation accompanying the assembly of the rotor 2 is started.
[0037]
In this case, assembling work contents for all parts including the rotor 2 and data indicating the procedure of the work (assembly procedure) are stored in the assembly master database 57 in advance. The assembling cost estimation system 80 determines the assembling cost of the rotor 2 based on the work content and work procedure of the assembling work of each assembly stored in the assembling master database 57.
[0038]
The assembly cost estimation system 80 includes a DFA cost estimation system 60 and a DMU cost estimation system 70. As will be described next, the DFA cost estimation system 60 and the DMU cost estimation system 70 determine the assembly cost by different methods. Note that the assembly cost estimation system 80 may have a configuration in which only one of the DFA cost estimation system 60 and the DMU cost estimation system 70 is provided. However, as in the present embodiment, both the DFA cost estimation system 60 and the DMU cost estimation system 70 are provided. If the assembly cost is calculated by a different method, highly accurate estimation is possible. Hereinafter, each of the DFA cost estimation system 60 and the DMU cost estimation system 70 will be described.
[0039]
The cost of the assembled product is calculated by the DFA cost estimation system 60 using software of a commercially available DFA (for example, product name: Design for assembly, sold by ITOCHU Technoscience), and the cost is reflected in the present system. Let it. In the DFA cost estimation system 60, the assemblability is evaluated, for example, for the following items.
[0040]
Specifically, in the DFA cost estimation system 60, assemblability is evaluated by the user inputting parameters for the following items. That is, the cost is calculated from the time required for the fitting 61a and the rotation of the wrist 61b, the influence on the workability due to the standing / squatting 61c is considered, and the work requiring the waist bending 61d is reduced by the work time. The workability is affected depending on whether the posture is the upward posture 61e or the downward posture, and each item is the work of the inside or outside of the field of view 61f. As a result of considering the man-hours of these items, the assemblability of the rotor 2 is evaluated in terms of points and reflected in the assembling cost of the rotor 2.
[0041]
The DFA cost estimation system 60 reflects the determined assembly cost of the rotor 2 so as to be updated with respect to the approximate cost of the rotor 2 in the approximate cost estimation system 20.
[0042]
At the same time, if the assembling cost of the rotor 2 obtained by the DFA cost estimation system 60 is high, the assembling procedure is reviewed so that the workability of the worker is improved (the assembling cost is reduced). If an assembling procedure with a lower assembly procedure is found, the data of the assembling procedure is stored in the assembling master database 57.
[0043]
When the assembling procedure is changed in the DFA cost estimation system 60 or when the shape 43 of the change item 41 is changed in the detailed cost estimation system 40, the assemblability of the parts 11 to 13, 21a to 23a. Therefore, the DFA cost estimation system 60 needs to recalculate the assembly cost again.
[0044]
In the DMU cost estimation system 70, 3D assembly simulation software using DMU (Digital Mock Up) (for example, Nippon Technomatics's product name: eM-Assembly or Nippon Delmia's product name: MVision, etc.) is used. Is done.
[0045]
The assembling simulation software simulates the workability (assemblability) when an operator modeled in the world of 3D CAD assembles the assembly, and based on the workability, the man-hours (assembly) of the assembly ( Time), and the assembly cost is calculated from the time.
[0046]
Items to be evaluated in the DMU cost estimation system 70 when the assemblability is evaluated are the same as those in the DFA cost estimation system 60. 71e, inside and outside of the field of view 71f...
[0047]
The calculated cost of the rotor 2 is reflected by the DMU cost estimation system 70 so as to be updated with respect to the estimated cost of the rotor 2 in the estimated cost estimation system 20.
[0048]
At the same time, if the assembly cost of the rotor 2 determined by the DMU cost estimation system 70 is high, the assembly procedure is reviewed so that the workability of the worker is improved (the assembly cost is reduced), and the assembly cost is improved. If an assembling procedure with a lower assembly procedure is found, the data of the assembling procedure is stored in the assembling master database 57.
[0049]
When the assembling procedure is changed in the DMU cost estimation system 70, or when the shape 43 of the change item 41 is changed in the detailed cost estimation system 40, the assemblability of the parts 11 to 13, 21a to 23a. Therefore, the DMU cost estimation system 70 needs to recalculate the assembly cost again.
[0050]
In the cost estimating system 10 of the present embodiment, first, the approximate cost estimating system 20 obtains an estimate of the cost of an assembly or a component from the component hierarchy diagram of the design BOM 21 and the past performance in the cost performance database 22. it can. In the cost estimation system 10 of the present embodiment, detailed costs for the materials 42, shapes 43, processing methods 44, etc. of the parts 11 to 13, 21a to 23a. Alternatively, the cost of assembling the assembled product can be obtained in detail, and a more detailed (accurate) cost can be obtained than the estimated cost.
[0051]
The calculation of the assembly cost using the DFA cost estimation system 60 or the DMU cost estimation system 70 according to the present embodiment is performed at a part or product design stage, or at a stage after the design and before the start of manufacturing. Even after the design, the processing method 44 in the change item 41 can be changed, and the re-calculation of the assembly cost due to the change in the processing method is also possible.
[0052]
The detailed cost estimation system 40 according to the present embodiment can also be used when repair or replacement of parts 11 to 13, 21a to 23a. In the case of maintenance, the processing method at the time of manufacturing and its cost are referred to as history data, or the material 42, shape 43, or processing method 44 of the parts 11 to 13, 21a to 23a... , The cost of the parts 11 to 13, 21a to 23a... At the time of maintenance can be estimated using the material database 51, the shape change system 52, the process change system 53, and the like. Further, the DFA cost estimation system 60 or the DMU cost estimation system 70 can also be used for estimating the disassembly cost of the operation of disassembling a product into parts at the time of maintenance.
[0053]
In the detailed cost estimation system 40 according to the present embodiment, the user can perform both rough cost estimation and detailed cost estimation with one system.
In the detailed cost estimation system 40 of the present embodiment, a user can obtain a detailed cost only for a necessary part. Further, when calculating the detailed cost, the user should estimate the detailed cost only for necessary items among materials, processing methods, shapes, assemblability, etc. (with accuracy as required). Can be.
[0054]
【The invention's effect】
According to the present invention, it is possible to estimate the cost for each of a plurality of components constituting a product by rough estimation, and to estimate the cost of a necessary component in detail.
[Brief description of the drawings]
FIG. 1 is a block diagram of the overall configuration of an embodiment of a cost estimation system according to the present invention.
FIG. 2 shows an example of a screen displayed on the approximate cost estimation system in one embodiment of the cost estimation system of the present invention.
FIG. 3 is a block diagram showing a part of a detailed cost estimation system in an embodiment of the cost estimation system of the present invention.
FIG. 4 is a block diagram showing a process change system in an embodiment of the cost estimation system of the present invention.
FIG. 5 is a block diagram showing a shape changing system in one embodiment of the cost estimation system of the present invention.
FIG. 6 is a block diagram showing an assembly cost estimation system in one embodiment of the cost estimation system of the present invention.
[Explanation of symbols]
Reference Signs List 1 casing 2 rotor 10 cost estimation system 11 A part 12 B part 13 C part 20 approximate cost estimation system 21 design BOM
21a E part 22a F part 23a G part 22 Cost record database 40 Detailed cost estimation system 41 Change item (list)
42 Material 42a Material list 43 Shape 44 Processing method 51 Material database 52 Shape change system 53 Process change system 53a Processing method list 54 Process master database 55 Processing database 57 Assembly master database 60 DFA cost estimation system 70 DMU cost estimation system 80 Assembly cost estimation System 90 CAD

Claims (9)

A cost estimation system comprising an approximate cost estimation device and a detailed cost estimation device,
The approximate cost estimating apparatus includes a first cost data indicating a component cost based on a past performance of each of a plurality of components constituting a product and an assembly cost required for assembling the plurality of components based on a past performance. Is provided with a cost performance database in which
The cost estimation system, wherein the detailed cost estimation device automatically calculates a second cost according to a change in at least one of a material, a shape, and a processing method for each of the plurality of components. In the cost estimation system according to claim 1,
The cost estimation system, wherein the detailed cost estimation device calculates the second cost for a part of the plurality of parts specified by a user. In the cost estimation system according to claim 1 or 2,
The said detailed cost estimation apparatus is a cost estimation system which calculates the said 2nd cost according to the change of at least any one condition specified by the user among the said material, shape, and a processing method. In the cost estimation system according to any one of claims 1 to 3,
The cost estimation system, wherein the detailed cost estimation device includes a material database indicating a relationship between weight and cost for each of the plurality of materials with respect to the material as the condition. In the cost estimation system according to any one of claims 1 to 4,
The detailed cost estimating apparatus is configured to perform a plurality of processes for each of the plurality of components, and a plurality of processes in accordance with the used facilities when the used facilities are changed in accordance with each of the plurality of steps and each of the plurality of steps. A cost estimation system that includes a process master database that indicates the relationship with the cost involved. In the cost estimation system according to claim 5,
The detailed cost estimation device further comprises:
A cost estimating system comprising a processing database indicating a relationship between a parameter value for a specific processing mode of each of the plurality of processes and a cost according to the parameter value. In the cost estimation system according to claim 4,
The detailed cost estimation device obtains the weight of the component from a volume corresponding to the shape of the component changed on the CAD device, refers to the material database, and calculates the cost of the component based on the determined weight. A cost estimation system that seeks. The cost estimation system according to any one of claims 1 to 7,
The detailed cost estimation device has an assembly master database in which data indicating work contents and work procedures for each of the plurality of parts is stored, and an assembly cost estimation device,
The assembling cost estimating device obtains the workability at the time of assembling the component based on the work content and the data indicating the work procedure for the component stored in the assembly master database. A cost estimation system for determining an assembly cost for the component based on In the cost estimation system according to claim 8,
A cost estimation system that obtains the work procedure such that the workability is improved based on the assembly cost corresponding to the work procedure.

Images