JP2003256555A - Environmental influence assessment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in a conventional system that it is difficult for a general user having no detailed special environmental, mathematics and statistics knowledges to assess the priority order of operating conditions of a device to be improved by the analysis of the load value given to the environment by a product. <P>SOLUTION: The user specifies the material of a part or unit changeable by himself, and the environmental load value in the execution of substitution is calculated only for the specified material, whereby the environmental load value of the product and the influence degree on the environmental load value by the substitution of the specified material are determined. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for evaluating the influence of a product on the environment by calculating the usage amount and the basic unit of the materials used in the parts or units constituting the product.

[0002]

2. Description of the Related Art Life cycle assessments, risk assessments, etc., are examples of environmental impact assessment methods that have been well implemented in the past. Life cycle assessment is a method of quantifying the environmental load in the product life cycle from raw material mining to disposal / recycling.
It is standardized to SO14040 series. Life cycle assessment can provide quantified indicators for categories such as energy consumption, global warming, ozone depletion, air pollution, water pollution and resource depletion. Risk assessment is a method of quantifying the impact on the surrounding environment or the ecosystem including humans due to the release of chemical substances. The technique of assessing how an emitted chemical substance migrates in the environment and ultimately leads to exposure to humans and ecosystems, that is, the fate of a chemical substance in the environment is described by Mackay's fugacity model (Envi.
romantic Science Technology
Ogy, 15, 1006-1014 (1981)) has been used to build many models (RIV of the Netherlands).
M Report No. 719101029, USA UCRL-CR-11456, etc.).

By using these environmental impact evaluation methods, it is possible to obtain a quantitative index of the environmental load of the product. The obtained quantitative index usually does not include information about which of the plurality of materials used for products can be substituted to effectively reduce the environmental load.

A method for selecting an alternative material in consideration of environmental influence has been studied by Ashby et al. (Mat
initial & Design, 17, No. 1,11-1
7 (1996) etc.). This methodology supports the selection of alternative materials in mechanical design by projecting the function and environmental compatibility of each material on a two-dimensional chart and performing comparison with the reference material.

[0005]

A product is usually composed of a large number of parts or units, and naturally, a wide variety of materials are used. In addition, there are a wide range of materials that are alternative candidates. Therefore, in the case where all the alternative materials are examined for all the parts or units in the environmental impact assessment system, the load on the machine becomes very large. It is considered that some of the materials used for the parts or units to be evaluated can be changed by the user's intention of the system, while the evaluation of substitution for all materials is performed. This is not preferable in terms of efficiency.

[0006] Further, when carrying out the evaluation of substitution, it is considered that extensive and detailed information on the environmental load caused by the material as well as the characteristics of the material is essentially necessary for the proper selection of the alternative candidate. It requires specialized knowledge to collect information and to judge the rationality of the collected information, which is difficult for general users.

For the above reasons, the quantitative evaluation of the environmental load reduction effect by substituting each material used for the parts or units constituting the product is performed by a general user who does not have detailed environment and material expertise. It is rarely done. As a result, it is said that it is very difficult at present to identify problematic parts or units, materials, etc. by interpretation of quantitative indicators obtained by conventional evaluation methods, and to lead to continuous improvement of products. I have no choice.

[0008]

According to the present invention, only the material designated as changeable by the user among the materials used for the parts or units constituting the product is set to the environmental load value when the substitution is carried out. An environmental impact assessment system that assesses the impact of substitution of designated materials on the environment by computing. At this time, the user directly specifies the material to be considered for substitution. Further, the material to be the alternative candidate is directly selected by the user or is selected by the system using the stored alternative material correspondence information.
By selecting alternative materials, the system can evaluate the environmental impact of alternative materials used for each part or unit, even for users who do not have expertise in materials. It will be possible.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the environmental impact assessment system according to the present invention will be described below with reference to the embodiments.

(Embodiment 1) FIG. 1 shows Embodiment 1 of an environmental impact evaluation system according to the present invention.

The present system comprises input means 1, reference material specification storage means 2, basic unit storage means 3, alternative material usage amount calculation means 4, alternative material specification storage means 5, environmental load calculation means 6,
It comprises a material evaluation means 7 and an output means 8.

The reference material specification storage means 2 is a user of the system for each type and amount of material used for each component or unit constituting the product, which is used for calculating the environmental load value. Stores information about whether or not can be changed. The substitute material specification storage unit 5 stores the type of substitute material and the use amount of the substitute material calculated by the substitute material use amount calculation unit 4.

The basic unit storage means 3 stores information about the basic unit related to each material stored in the specification storage means. The basic unit to be memorized is a coefficient for calculating the amount of use required to express the required performance, the amount of energy used in the life cycle, carbon dioxide emissions, air pollutant emissions, water pollutant emissions, Resource consumption,
Various physical chemical constants and toxicity test values of chemical substances are possible. In addition, examples of the coefficient for calculating the amount of use required to develop the required performance include density, mechanical constants such as Young's modulus and tensile strength, and thermal properties such as thermal conductivity and linear expansion coefficient. Examples of the constants include electric constants such as resistivity and dielectric constant, and coefficients obtained by calculating these constants.

The reference material specification storage means 2, the basic unit storage means 3 and the alternative material specification storage means 5 are arranged inside the system in FIG. In this case, a removable medium such as a magnetic recording medium or an optical recording medium is used as the storage means. It should be noted that one or both of these two types of storage means may be configured to appropriately use an external storage means via a network.

As the present system, a personal computer, a workstation and a server on the network are used, as an input means, a keyboard, a mouse and the like, and as output means, a display, a printer and an IC.
A memory writing device or the like can be used respectively. This also applies to the following embodiments.

FIG. 2 calculates the environmental load value of the entire product to be evaluated and ranks the material specifications that can be changed by the user based on the environmental load value in the environmental impact assessment system having the configuration of FIG. 6 is a flowchart illustrating a method for performing The operation of this system will be described based on this figure.

In the procedure 1, the user of the system can change the type and amount of the material used for each part or unit constituting the product to be evaluated, whether or not each material can be changed, through the input means. Enter the specifications that describe the required performance of the modifiable material.
Examples of required performance are strength, rigidity, vibration resistance,
Examples thereof include heat insulating property, heat resistant property, and electrical insulating property, but are not limited thereto. Then, in step 2, the reference material specification storage means stores the specifications input in step 1.

In step 3, the alternative material usage amount calculation means is
For the material stored as changeable according to the specifications stored in the reference material specification storage means in step 2, the usage amount and required performance, and the required performance stored in the basic unit storage means The coefficient for calculating the amount of use required for the above is used, and the amount of use of the substitute material required for developing the performance corresponding to the material is sequentially calculated. Then, in step 4, step 3
The usage amount of the substitute material calculated in step S3 is stored together with the type of the substitute material.

In step 5, the environmental load calculation means performs calculation using the specifications stored in the reference material specification storage means and the alternative material specification storage means, and the basic unit stored in the basic unit storage means, The environmental load value of the product in each specification and the ratio of contribution of each part or unit to the environmental load value are calculated. Examples of calculated environmental load values are energy consumption based on life cycle assessment, resource consumption, carbon dioxide emissions, emissions of various chemical substances, global warming impact, ozone layer depletion impact, resource depletion. Examples include, but are not limited to, the degree of influence, the risk value to the environment or humans based on the risk assessment, and the index that integrates a plurality of evaluation values among these.

In step 6, the material evaluation means ranks the evaluated specifications in ascending order of the environmental load value calculated in step 5. Through this procedure 6, it is possible to obtain information about the types of alternative materials that can be most reduced in the environmental load value among the materials that can be changed by the user. The ranking result of each specification evaluated in step 6 is displayed via the output means in step 7, together with the environmental load value calculated in step 5 and the contribution of each component or unit to the environmental load value. It The contribution ratio of each component or unit to the environmental load value can be displayed by a pie chart, a bar chart, or the like.

With this system, it has been difficult for general users to evaluate the effect of reducing the environmental load value by substituting the materials used for the parts or units that make up the product. It becomes possible to implement easily and efficiently while avoiding the above.

(Second Embodiment) FIG. 3 shows a second embodiment of the environmental influence evaluation system according to the present invention.

The present system comprises an input means 1, an input means 1,
Reference material specification storage means 2, basic unit storage means 3, reference material environmental load calculation means 9, alternative target storage means 10, alternative material usage amount calculation means 4, alternative material specification storage means 5, alternative material environmental load calculation means 11, It comprises a material evaluation means 7 and an output means 8. The substitution target storage unit 10 stores the type of changeable material input by the user and the performance required for the changeable material.

FIG. 4 shows the environmental impact evaluation system having the configuration of FIG. 3 in which the environmental impact values of all the products to be evaluated are calculated and the material specifications that can be changed by the user are ranked based on the environmental impact values. 6 is a flowchart illustrating a method for performing The operation of this system will be described based on this figure.

In the procedure 1, the user of the system inputs the specifications in which the kind and the amount of the material used for each part or unit constituting the product to be evaluated are described through the input means. Here, it is not entered whether or not each material can be changed, and performance required for the material that can be changed. Then, in step 2, the reference material specification storage means stores the specifications input in step 1.

In step 3, the reference material environmental load calculation means carries out calculation using the specifications stored in step 2 and the basic unit stored in the basic unit storage means, and based on the material specifications input by the user. The environmental load value of the product without replacement and the ratio of contribution of each component or unit to the environmental load value are calculated. Subsequently, in step 4, the reference material environmental load calculation means, together with the environmental load value based on the specifications stored in the reference material use storage means calculated in step 3, and the ratio of contribution of each part or unit to the environmental load value. , An input screen of the type of material that can be changed by the user and the performance required for the changeable material is displayed via the output means.

In step 5, the type of material that the user of the system can change through the input means by the user,
Also enter the required performance for the modifiable material. Subsequently, in step 6, the type of material that can be changed by the user and the performance required for the changeable material input in step 5 are stored in the substitution target storage means.

In step 7, the alternative material usage amount calculation means is
For the material stored in the alternative target storage means that can be changed in step 6, the use amount and the required performance, and the use amount necessary for expressing the required performance stored in the basic unit storage means are calculated. By using the coefficient for performing the calculation, the amount of the substitute material used for developing the performance corresponding to the material is sequentially calculated. Subsequently, in step 8, the alternative material specification storage means sets
The specifications describing the usage amount of the alternative material calculated in step 1 and the type of the alternative material are stored. Further, in step 9, the alternative material environmental load calculation means performs the calculation using the specifications stored in the alternative material specification storage means in step 8 and the basic unit stored in the basic unit storage means, and the user The environmental load value of the product when the input material is replaced and the ratio of contribution of each part or unit to the environmental load value are calculated.

In step 10, the material evaluation means compares the environmental load value of the product calculated in step 3 with the environmental load value of the product in the specification of material substitution calculated in step 9, and the environmental load value is small. The specifications will be ranked in the following order. The ranking result of each specification evaluated in step 10 is output in step 11 together with the environmental load value in each specification calculated in step 3 and step 9 and the ratio of each component or unit contributing to the environmental load value. Displayed via means.

With this system, the user can select the material to be changed after confirming which of the plurality of parts or units has a great effect on the environmental load value. As a result, the efficiency of material selection by the user is improved.

(Third Embodiment) FIG. 5 shows a third embodiment of the environmental influence evaluation system according to the present invention.

The present system comprises an input means 1, a reference material specification storage means 2, a basic unit storage means 3, a reference material environmental load calculation means 9, an alternative target storage means 10, an alternative material usage amount calculation means 4, an alternative material specification storage. It comprises means 5, alternative material environmental load calculation means 11, material evaluation means 7, evaluation case storage means 12, and output means 8.

The evaluation case storage means 12 stores specification information and evaluation results in cases where evaluations have been carried out in the past using this system. Evaluation case storage means 11
3 has a configuration existing inside the system in FIG. 3, but may have a configuration in which external storage means is appropriately used via a network.

FIG. 6 shows a method of calculating the environmental load value of the entire product to be evaluated and ranking the material specifications that can be changed by the user based on the environmental load value in this embodiment. It is a flowchart explaining. The operation of this system will be described based on this figure.
Figure 4 shows the calculation of the environmental load value of the product from step 4 in step 1 and the calculation of the ratio of each component or unit contributing to the environmental load value and the display of the input screen.
Is the same as.

In step 5, the type of material that the user of the system can change through the input means by the user,
Enter the required performance for the modifiable material, as well as the type of material the user wants to evaluate as a candidate alternative material. In step 5, if the user desires to refer to the specification information in the past evaluation cases, first in step A, the evaluation case to be referred to is selected from the evaluation case storage means. Subsequently, in procedure B, the evaluation case storage means displays the information of the specifications at the time of evaluation of the selected case via the output means. By this procedure A and procedure B, the user inputs the type of material that can be changed by the user and the performance required for the changeable material while referring to past evaluation cases similar to the evaluation target. It becomes possible and input becomes easy. Then, in step 6, the type of material that can be changed by the user, which is input in step 5, the performance required for the changeable material, and the type of material that the user wants to evaluate as an alternative material candidate are stored in the replacement target memory. Memorize.

In step 7, the alternative material usage amount calculation means is
For the material stored in the alternative target storage means that can be changed in step 6, the use amount and the required performance, and the use amount necessary for expressing the required performance stored in the basic unit storage means are calculated. Using the coefficient for performing the calculation, the usage amount necessary for developing the performance corresponding to the material that is stored as the changeable material is sequentially calculated only for the alternative material candidate stored in step 6. The procedure for storing the alternative material specifications, which is the procedure 8, is the same as in FIG. The evaluation result is displayed in step 11 via the output means and stored in the evaluation case storage means.

With this system, it becomes possible to evaluate the environmental load value when using the alternative material only for the alternative material candidate specified by the user, and it is possible to further reduce the load on the machine. In addition, regarding the types of materials that the user can change, the performance required for the changeable materials, and the types of materials that are alternative material candidates,
It is possible to compare with the settings in the past evaluation examples of similar products, input errors and irrational selection of materials are avoided, and the accuracy of evaluation results is improved.

(Fourth Embodiment) FIG. 7 shows a fourth embodiment of the environmental influence evaluation system according to the present invention.

The present system comprises an input means 1, a reference material specification storage means 2, a basic unit storage means 3, and an alternative candidate storage means 1.
3, alternative material usage amount calculation means 4, alternative material determination means 1
4, an alternative material specification storage means 5, an environmental load calculation means 6, a material evaluation means 7, and an output means 8.

The alternative candidate storage means 13 stores, for each material whose basic unit data is stored in the basic unit storage means, correspondence information of materials that can be used as alternative materials. As an example of the correspondence information, for example, in the case of polystyrene generally used as a product housing, corresponding substitute materials include resins such as polypropylene, polycarbonate, ABS resin, and metal materials such as iron, stainless steel, aluminum alloy, and magnesium alloy. .

FIG. 8 shows the environmental impact evaluation system having the configuration shown in FIG. 7, in which the environmental impact values of all the products to be evaluated are calculated and the material specifications that can be changed by the user are ranked based on the environmental impact values. 6 is a flowchart illustrating a method for performing The operation of this system will be described based on this figure.

In the procedure 1, the user of the system can change the type and amount of the material used for each part or unit constituting the product to be evaluated, and whether or not each material can be changed through the input means. Enter the specifications that describe the required performance of the possible materials and the allowable range of the amount of the alternative materials used. The allowable range of the amount of the alternative material used can be specified by the rate of increase or decrease in weight or volume, the rate of increase or decrease in cost, etc., depending on the performance and cost required for each material. Then, in step 2,
The reference material specification storage means stores the specification input in step 1.

In step 3, the alternative material usage amount calculation means is
Information on the alternative material corresponding to the material which is stored as changeable in the procedure 2 is retrieved from the alternative candidate storage means, and the type of the applicable alternative material is stored. In step 4, the alternative material usage amount calculation means is necessary for the usage amount of the material stored as changeable in step 2 and the required performance, as well as the expression of the required performance stored in the basic unit storage means. Using the coefficient for calculating the usage amount, the usage amount required for developing the performance corresponding to the material memorized as the changeable material is sequentially calculated for the alternative material stored in the procedure 3.

In the procedure 5, the alternative material determining means is the procedure 4
The amount of each substitute material calculated in step 2 is compared with the allowable range of the amount of substitute material stored in step 2, and only the alternative material for which the calculated amount of use is within the allowable range is selected. . If the cost increase / decrease rate is specified as the allowable range, use the data of the cost per unit charge of each material stored in the basic unit storage means and convert it appropriately to the increase / decrease rate of the usage amount. Once done, a comparison needs to be made. Subsequently, in procedure 6, the substitute material use storage means stores the type of substitute material selected in procedure 5 and the usage amount calculated in procedure 4. Each procedure after the calculation of the environmental load value in the procedure 6 is the same as the procedure 5 and subsequent steps in FIG.

With this system, it is possible to carry out an evaluation using the information on the alternative material corresponding to each material stored in the alternative candidate storage means, and therefore, when the user does not have detailed knowledge of the material. Also, it becomes easy to select alternative materials and evaluate the reduction amount of environmental load value by substitution. In addition, it is possible to perform evaluation only on alternative materials that exhibit the corresponding function without exceeding the allowable range of the usage amount input by the user himself, and avoid setting unreasonable material specifications. . These results,
The efficiency of evaluation is improved, and product design is easier to improve.

(Fifth Embodiment) FIG. 9 shows a fifth embodiment of the environmental influence evaluation system according to the present invention.

This system is based on the reference material specification storage means 2,
It is composed of a basic unit storage unit 3, an alternative material usage amount calculation unit 4, an alternative material specification storage unit 5, an environmental load calculation unit 6, a cost calculation unit 15, an environmental efficiency calculation unit 16, a material evaluation unit 7, and a communication unit 17. A plurality of terminals 19 composed of a server 18, input means 1, output means 8 and communication means 17
Are connected via the network 20. However, the system configuration is not limited to this.

Server 18 and terminal 1 on network 20
By configuring this system from No. 9, the machine load on the terminal on the user side of the system is reduced and the system can be easily constructed. Further, since it is possible to input the specifications of the same product from a plurality of terminals, for example, the person in charge of the parts or the unit inputs the specifications of the respective parts or units constituting the product, or the parts or units or It becomes easy for the manufacturer of the materials used for these to directly input the specifications.
From this, it is possible to carry out the environmental impact assessment using a more accurate specification.

In the present system, the basic unit stored in the basic unit storage means 3 includes the basic unit data shown in the first embodiment and the cost in the unit usage of each material.

FIG. 10 calculates the environmental efficiency per unit material cost of the product to be evaluated in the environmental impact evaluation system having the configuration of FIG. 8 and also calculates the environmental efficiency of the material specifications that can be changed by the user. 6 is a flowchart illustrating a method of performing ranking on the. The operation of this system will be described based on this figure.
Each procedure from the specification of the procedure 1 to the calculation of the environmental load value of the procedure 5 is the same as in FIG.

In the case of the present system composed of a server and a terminal as shown in FIG.
It is possible for a plurality of users to carry out a product from a plurality of terminals. In this case, a user who inputs data for one product is registered in advance in the reference material specification storage means, and each user checks his or her own user registration via the input means as soon as the specification input is completed. You can check the input status of. The system confirms that all registered users have completed input, and then proceeds to the following steps.

In step 6, the cost calculation means uses the specifications stored in the reference material specification storage means and the alternative material specification storage means, and the cost in the unit usage amount of each material stored in the basic unit storage means. Perform calculations to calculate the cost for the materials used in the product for each specification. Then, in step 7, the environmental efficiency calculation means
Environmental load value of product calculated in step 5 and step 6
Calculate the eco-efficiency per unit cost for each specification using the cost related to the material calculated in.

(Equation 1) is shown as an example of the equation for calculating the environmental efficiency per unit cost.

[0054]

[Equation 1]

Since it is considered that the smaller each environmental load value and material cost are, the more excellent it is. Therefore, the greater the environmental efficiency calculated by (Equation 1), the better the environmental harmony specifications are evaluated. Is possible. In (Equation 1), the eco-efficiency of the entire product is calculated by multiplying the eco-efficiency corresponding to a plurality of environmental load values, but the eco-efficiency calculation formula is naturally limited to (Equation 1). Not something.

In step 8, the material evaluation means ranks the specifications evaluated by using the environmental efficiency in each specification calculated in step 7. For example, in the case of the eco-efficiency shown in (Equation 1), by ranking the eco-efficiency in descending order, information about the types of alternative materials that can be reduced by the user among the materials that can be changed by the user Can be obtained. The ranking result of each specification evaluated in step 8 is the environmental load value calculated in step 5, the ratio of contribution of each component or unit to the environmental load value, the cost related to the material calculated in step 6, and It is displayed through the output means in step 9 together with the environmental efficiency calculated in step 7. FIG. 11 shows an output example of the evaluation result in this system.

In this system, the cost related to the material is calculated at the same time as the environmental load value in each specification, and the environmental efficiency calculated by using both the environmental load value and the cost related to the material is used as an index for ranking each specification. By using it, it becomes possible to carry out more realistic alternative material selection in consideration of both environmental compatibility and economic efficiency.

[0058]

According to the present invention, when evaluating the effect of a product on the environment, not only the environmental load of the entire product is quantitatively evaluated, but also the materials used for each part or unit constituting the product are evaluated. It is possible to easily and efficiently evaluate the degree of influence that substitution has on the environmental load of the entire product. Therefore, it is possible to easily obtain the priority order of the materials to be replaced, which leads to continuous product improvement.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an environmental impact evaluation system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an environmental impact evaluation method according to the first embodiment of the present invention.

FIG. 3 is a conceptual diagram of an environmental impact evaluation system according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing an environmental impact evaluation method according to the second embodiment of the present invention.

FIG. 5 is a conceptual diagram of an environmental impact assessment system according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing an environmental impact evaluation method according to the third embodiment of the present invention.

FIG. 7 is a conceptual diagram of an environmental impact assessment system according to Embodiment 4 of the present invention.

FIG. 8 is a flowchart showing an environmental impact evaluation method according to the fourth embodiment of the present invention.

FIG. 9 is a conceptual diagram of an environmental impact assessment system according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart showing an environmental impact evaluation method according to the fifth embodiment of the present invention.

FIG. 11 is a diagram showing an output example of an environmental impact evaluation result according to the fifth embodiment of the present invention.

[Explanation of symbols]

1 Input means 2 Standard material specification storage means 3 Basic unit storage means 4 Alternative material usage calculation means 5 Alternative material specification storage means 6 Environmental load calculation means 7 Material evaluation means 8 output means 9 Standard material environmental load calculation means 10 Substitution target storage means 11 Alternative material environmental load calculation means 12 Evaluation case storage means 13 Alternative candidate storage means 14 Alternative material determination means 15 Cost calculation means 16 Environmental efficiency calculation means 17 Communication means 18 servers 19 terminals 20 networks

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Onishi             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (9)

[Claims] 1. In a system for evaluating the environmental impact of a product, a specification describing the type and amount of material used for each component or unit constituting the product, and each of the types of the material Inputting means for inputting whether or not the change is allowed, reference material specification storing means for storing whether or not the specification and each type of the material can be changed, and a basic unit storing means for storing basic unit data of the material, An alternative material usage amount calculation means for calculating the usage amount of the alternative material necessary for manifesting the function corresponding to the material stored in the reference material specification storage means based on the specification and the basic unit data, and the alternative Alternative material specification storage means for storing specifications describing the type of material and the usage amount calculated by the alternative material usage amount calculation means, and the reference material Based on the specifications and the basic unit data stored in the charge specification storage means or the alternative material specification storage means, the environmental load value of the product and the contribution ratio of each part or unit to the environmental load value are sequentially calculated. The environmental load calculation means and the environmental load value in each specification stored in the alternative material specification storage means are compared with the environmental load value in the specification stored in the reference material specification storage means, and the environmental load value is set in the ascending order of the environmental load value. It is provided with a material evaluation means for ranking the specifications, and an output means for displaying the calculated environmental load value, the proportion of each part or unit contributing to the environmental load value, and the result of the ranking of the specifications. Environmental impact assessment system. 2. In a system for evaluating the environmental impact of a product, specifications describing the type and amount of material used for each part or unit constituting the product, and each of the types of material Input means for inputting whether or not to change, reference material specification storage means for storing the specifications, basic unit storage means for storing basic unit data of the material, environmental load of the product from the specifications and the basic unit data. Value and the ratio of contribution of each part or unit to the environment-added value is calculated and displayed via the output means, the reference material environmental load calculating means and each of the kinds of materials used for the part or unit. Alternative target storage means for storing whether or not change is possible,
An alternative material usage amount calculation means for calculating the usage amount of the alternative material required for manifesting a corresponding function from the specification and the basic unit data for the material stored as changeable in the alternative object storage means, and the alternative Alternative material specification storage means for storing specifications in which the type of material and the usage amount calculated by the alternative material usage amount calculation means are stored,
The environmental load value of the product when an alternative material is used based on the specifications stored in the alternative material specification storage means and the basic unit data, and the ratio of contribution of each part or unit to the environmental load value are sequentially calculated. The alternative material environmental impact calculating means for calculating and each environmental load value calculated by the alternative material environmental impact calculating means are compared with the environmental load value calculated by the reference material environmental impact calculating means, and the environmental load value is small. It is provided with a material evaluation means for ranking the specifications in order, an output means for displaying the calculated environmental load value, a ratio of contribution of each part or unit to the environmental load value, and a result of ranking the specifications. , The possibility of changes for each of the above material types,
The environmental impact evaluation system, wherein the reference material environmental load calculation means calculates the ratio of contribution of each part or unit to the environmental load value and the environmental added value and then inputs the calculated ratio through the input means. 3. Input means for simultaneously inputting whether or not it is possible to change the type of material used for each part or unit that constitutes a product, and the type of material that can be substituted for the changeable material. And a reference material specification storage means or an alternative target storage means for storing the type of the input replaceable material, and a usage amount required for the expression of the corresponding function only for the input replaceable material. The environmental impact assessment system according to claim 1 or 2, further comprising an alternative material usage amount calculation means. 4. An alternative material information storage unit for storing correspondence information of an alternative material for each material, and a corresponding alternative material for the material stored as changeable in the reference material specification storage unit or the replacement target storage unit. And a substitute material usage amount calculating means for calculating a usage amount required for expressing a corresponding function only for the obtained substitute material. The environmental impact assessment system according to any one of 1 to 3. 5. An input for inputting an allowable range of the usage amount of the substitute material for the material that can be changed, as well as whether or not it is possible to change each kind of the material used for each part or unit that constitutes the product. Means, reference material specification storage means or substitute target storage means for storing the input allowable range, and substitute material use for calculating the amount of use of the substitute material necessary for expressing the function corresponding to the changeable material Amount calculation means, alternative material determination means for selecting an alternative material for which the calculated usage amount takes a value within the allowable range, and alternative material specification storage means for storing the type and usage amount of the selected alternative material The environmental impact assessment system according to any one of claims 1 to 4, further comprising: 6. The basic unit data includes at least a material characteristic per unit usage amount, an environmental load value, and a cost per unit usage amount, and simultaneously calculates the material cost related to the product together with the environmental load value of the product. The environmental impact assessment system according to any one of claims 1 to 4. 7. The environmental load value of the product based on the specifications and the basic unit data stored in the reference material specification storage unit or the alternative material specification storage unit, and of each part or unit corresponding to the environmental load value. The environmental load calculation means for sequentially calculating the contribution ratio, and the cost due to the material of the product based on the specifications and the basic unit data stored in the reference material specification storage means or the alternative material specification storage means. The cost calculation means for calculating, the environmental load value and the cost are used to calculate the eco-efficiency per unit cost in each specification, and the eco-efficiency per unit cost is used to calculate the specification. Material evaluation means for ranking, the calculated environmental load value, the ratio of contribution of each part or unit to the environmental load value, Environmental efficiency per unit cost,
An environmental impact assessment system according to any one of claims 1 to 6, further comprising: output means for displaying a result of ranking the specifications. 8. The result of the evaluation case in the system, the type and amount of the material used for each part or unit constituting the product in the evaluation case, and whether or not each type of the material can be changed are stored. Evaluation case storage means, input means for inputting the evaluation case to be referred to, and the type and usage amount of the material stored in the evaluation case storage means for the evaluation case input via the input means, The environmental impact assessment system according to any one of claims 1 to 7, further comprising an output unit configured to display whether or not each type of material can be changed and an assessment result. 9. The environmental impact assessment system according to claim 1, wherein the energy consumption amount or the carbon dioxide emission amount is calculated as the environmental load value.