Evaluation method and its apparatus of work shop and product quality

• US 6,625,511 B1
• Filed: 03/16/2000
• Issued: 09/23/2003
• Est. Priority Date: 09/27/1999
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Asano, Masaaki, Suzuki, Tatsuya, Kubota, Takashi, Ohashi, Toshijiro, Miyakawa, Seii
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): RODRIGUEZ, PAUL L
• Application Number:
  US09/526,561
• Time in Patent Office: 1,286 Days
• Field of Search: 700/97, 700/103, 700/104, 700/108, 700/109-111, 700/117, 702/182, 702/183, 702/185, 703/13
• US Class Current: 700/110
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Abstract

Method and apparatus for evaluating quality of a product, and a recording medium therefor. The invention includes creating and storing in advance a workshop evaluating database, extracting from the prepared workshop evaluating database those failure occurrence ratio indexes which correspond to workshop facility levels of an input manufacturing workshop for workshop-conditioned failure influential items thereof, respectively, and evaluating/estimating failure occurrence likelihood for standard manufacturing works in the manufacturing workshop, the failure occurrence likelihood being then stored as workshop index in a product evaluating database, and evaluating/estimating a quality indicating a work-related defective ratio for the products to be manufactured through a plurality of manufacturing works in the manufacturing workshop by using the workshop indexes concerning that manufacturing workshop which has been stored in the article evaluating database in the workshop evaluating step.

Claims

1. A method of evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop.

2. A method of evaluating a-failure occurrence likelihood of a manufacturing workshop, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a workshop facility level inputting step of inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step said failure occurrence ratio indexes which correspond to the workshop facility levels, respectively, inputted in said workshop facility level inputting step for said workshop-conditioned failure influential items; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works in said evaluation-undergoing manufacturing workshop.

3. A method of evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between workshop-conditioned failure influential items set previously concerning worker(s), manufacturing equipment, manufacturing conditions, physical environment for manufacturing and management on one hand and on the other hand failure incurrence indexes representing failure occurrence suppressing abilities, failure coping time rate indexes representing failure occurrence coping abilities and defective extraction indexes representing failure detecting abilities at least for standard manufacturing works, respectively, at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a workshop facility level inputting step of inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step said failure occurrence, failure coping time rate, and defective extraction indexes which correspond to the workshop facility levels, respectively, inputted in said workshop facility level inputting step for said workshop-conditioned failure influential items; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing said failure occurrence, failure coping time rate, and defective extraction indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works in said evaluation-undergoing manufacturing workshop.

4. A method of evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between workshop-conditioned failure influential items set previously concerning worker(s), manufacturing equipment, manufacturing conditions, physical environment for manufacturing and management on one hand and on the other hand failure incurrence indexes representing failure occurrence suppressing abilities, failure coping time rate indexes representing failure occurrence coping abilities and defective extraction indexes representing failure detecting abilities for standard manufacturing works, respectively, at least at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a workshop facility level inputting step of inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step said failure occurrence, failure coping time rate, and defective extraction indexes which correspond to the workshop facility levels, respectively, inputted in said workshop facility level inputting step for said workshop-conditioned failure influential items and totalizing said failure occurrence, failure coping time rate, and defective extraction indexes to thereby arithmetically determine indexes indicating failure occurrence ratios for said workshop-conditioned failure influential items, respectively; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing said arithmetically determined indexes indicating the failure occurrence ratios over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop.

5. A method of evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database Preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop,

wherein in said workshop evaluation step, said workshop-conditioned failure influential items are mutually imparted with relative weights.

6. A method of evaluating a failure occurrence likelihood of a manufacturing workshop in comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between workshop-conditioned failure influential items set previously concerning worker(s), manufacturing equipment, manufacturing conditions, physical environment for manufacturing and management on one hand and on the other hand failure incurrence indexes representing failure occurrence suppressing abilities, failure coping time rate indexes representing failure occurrence coping abilities and defective extraction indexes representing failure detecting abilities at least for standard manufacturing works, respectively, at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a workshop facility level inputting step of inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database Prepared in said workshop database preparation step said failure occurrence, failure coping time rate, and defective extraction indexes which correspond to the workshop facility levels, respectively, inputted in said workshop facility level inputting step for said workshop-conditioned failure influential items; and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing said failure occurrence, failure coping time rate, and defective extraction indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating failure occurrence ratios for the standard manufacturing works in said evaluation-undergoing manufacturing workshop,

wherein in said workshop database preparation step, the workshop-conditioned failure influential items concerning the worker(s), the manufacturing equipment, the manufacturing conditions, the physical environment for manufacturing and the management are each subclassified into a plurality of items for each of said worker(s), the manufacturing equipment, the manufacturing condition, the physical environment for manufacturing and the management.

7. A method of evaluating a failure occurrence likelihood of a manufacturing workshop comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between workshop-conditioned failure influential items set previously concerning worker(s), manufacturing equipment, manufacturing conditions, physical environment for manufacturing and management on one hand and on the other hand failure incurrence indexes representing failure occurrence suppressing abilities, failure coping time rate indexes representing failure occurrence coping abilities and defective extraction indexes representing failure detecting abilities at least for standard manufacturing works, respectively, at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a workshop facility level inputting step of inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step said failure occurrence, failure coping time rate, and defective extraction indexes which correspond to the workshop facility levels, respectively, inputted in said workshop facility level inputting step for said workshop-conditioned failure influential items;

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing said failure occurrence, failure coping time rate, and defective extraction indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating failure occurrence ratios for the standard manufacturing works in said evaluation-undergoing manufacturing workshop;

an output step of outputting results of evaluation as executed by said workshop evaluation step.

8. A method of evaluating a quality of a product, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a workshop evaluation step of evaluating and estimating the failure occurrence likelihood in the manufacturing workshop by totalizing the extracted failure occurrence ratio indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said manufacturing workshop, results of said evaluation and estimation being stored as a workshop index in a product/article evaluating database; and

a product evaluating step of evaluating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said manufacturing workshop by using the workshop index concerning said manufacturing workshop as stored in the product/article evaluating database in said workshop evaluation step.

9. A method of evaluating quality of a product, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a workshop evaluation step of evaluating and estimating failure occurrence likelihood in the manufacturing workshop by totalizing the extracted failure occurrence ratio indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said manufacturing workshop, results of said evaluation and estimation being stored as a workshop index in a product/article evaluating database;

a product evaluating step of evaluating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said manufacturing workshop by using the workshop index concerning said manufacturing workshop as stored in the product/article evaluating database in said workshop evaluation step; and

a product database preparation step of storing in advance for preparation in a product evaluating database indexes indicating fractions defectives in a plurality of mutually differing standard manufacturing operations, respectively, and supplementary indexes which are based on properties of component parts involved in the standard manufacturing operations, respectively;

a product input step of inputting standard manufacturing operations inclusive of properties of the component parts involved in individual manufacturing works, respectively, over a plurality of manufacturing works for manufacturing a product;

a step of extracting the indexes indicating the fractions defectives and the supplementary indexes from the product evaluating database prepared in said product database preparation step on the basis of the standard manufacturing operations inclusive of the properties of the component parts in the individual manufacturing works as inputted in said product input step, said extracting step being executed in said product evaluating step; and

an evaluation/estimation step of correcting supplementarily the indexes indicative of the fractions defectives extracted in said indexes extracting step with said extracted supplementary indexes and synthesizing said supplementarily corrected indexes indicating the fractions defectives throughout a plurality of manufacturing works, whereon the synthesized index indicative of the fraction defective is supplementarily corrected with the workshop index stored in said workshop evaluation step for thereby evaluating through estimation the quality of said product indicative of the work-related defective ratio.

10. A method of evaluating quality of a product, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a workshop evaluation step of evaluating and estimating failure occurrence likelihood in the manufacturing workshop by totalizing the extracted failure occurrence ratio indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said manufacturing workshop, results of said evaluation and estimation being stored as a workshop index in a product/article evaluating database;

a product evaluating step of evaluating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said manufacturing workshop by using the workshop index concerning said manufacturing workshop as stored in the product/article evaluating database in said workshop evaluation step, further comprising;

a product database preparation step of storing in advance for preparation in a product evaluating database indexes indicating fractions defectives in a plurality of mutually differing standard manufacturing operations, respectively, and supplementary indexes which are based on properties of component parts involved in the standard manufacturing operations, respectively;

a product input step of inputting standard manufacturing operations inclusive of properties of the component parts involved in individual manufacturing works, respectively, over a plurality of manufacturing works for manufacturing a product;

a step of extracting the indexes indicating the fractions defectives and the supplementary indexes from the product evaluating database prepared in said product database preparation step on the basis of the standard manufacturing operations inclusive of the properties of the component parts in the individual manufacturing works as inputted in said product input step, said extracting step being executed in said product evaluating step; and

an evaluation/estimation step of correcting supplementarily said indexes indicative of the fractions defectives with said extracted supplementary indexes and said workshop index stored in said workshop evaluation step, and then synthesizing said supplementarily corrected indexes indicating the fractions defectives throughout a plurality of manufacturing works, to thereby evaluate through estimation the work-related defective ratio of the product.

11. A method of evaluating quality of a product, comprising:

a workshop evaluating step of storing, as a workshop index in a product evaluating database, a failure occurrence likelihood for each of standard manufacturing operations in a manufacturing workshop as estimated and evaluated by using a method of evaluating the failure occurrence likelihood in the manufacturing workshop,

wherein said method of evaluating the failure occurrence likelihood comprises;

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively,

a step of extracting from said workshop evaluating database Prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively, and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing-the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop; and

a product evaluating step of evaluating/estimating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said manufacturing workshop by using the workshop index concerning said manufacturing workshop as stored in said product evaluating database in said workshop evaluating step.

12. A method of evaluating quality of a product, comprising:

a workshop evaluating step of storing, as a workshop index in a product evaluating databases, a failure occurrence likelihood for each of standard manufacturing operations in a manufacturing workshop as estimated and evaluated by using a method of evaluating the failure occurrence likelihood in the manufacturing workshop,

wherein said method of evaluating the failure occurrence likelihood comprises;

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively,

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively, and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop;

a product database preparation step of storing in advance for preparation in a product evaluating database indexes indicating fractions defectives in a plurality of standard manufacturing operations which are different from each other, respectively, and supplementary indexes which are based on properties of component parts involved in the standard manufacturing operations, respectively;

a product input step of inputting standard manufacturing operations inclusive of properties of the component parts involved in individual manufacturing works, respectively, over a plurality of manufacturing works for manufacturing a product;

a step of extracting the indexes indicating the fractions defectives and the supplementary indexes from the product evaluating database prepared in said product database preparation step on the basis of the standard manufacturing operations inclusive of the properties of the component parts in the individual manufacturing works as inputted in said product input step; and

a product evaluating step of correcting supplementarily the extracted indexes indicative of the fractions defectives with said extracted supplementary indexes and synthesizing said supplementarily corrected indexes indicating the fractions defectives throughout a plurality of manufacturing works, whereon the synthesized index indicative of the fraction defective is supplementarily corrected with the workshop index stored in said workshop evaluation step for thereby evaluating through estimation the quality of said product indicative of a work-related defective ratio.

13. A method of evaluating quality of a product, comprising the undermentioned steps:

a workshop evaluating step of storing, as a workshop index in a product evaluating databases, a failure occurrence likelihood for each of standard manufacturing operations in a manufacturing workshop as estimated and evaluated by using the method of evaluating the failure occurrence likelihood in the manufacturing workshop said method evaluating the failure occurrence likelihood comprises;

a workshop database Preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively,

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively, and

a workshop evaluation step of evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop;

a product database preparation step of storing in advance for preparation in a product evaluating database indexes indicating fractions defectives in a plurality of standard manufacturing operations which are different from each other, respectively, and supplementary indexes which are based on properties of component parts involved in the standard manufacturing operations, respectively;

a product input step of inputting standard manufacturing operations inclusive of properties of the component parts involved in individual manufacturing works, respectively, over a plurality of manufacturing works for manufacturing a product;

a step of extracting the indexes indicating the fractions defectives and the supplementary indexes from the product evaluating database prepared in said product database preparation step on the basis of the standard manufacturing operations inclusive of the properties of the component parts in the individual manufacturing works as inputted in said product input step; and

a product evaluating step of correcting supplementarily said extracted indexes indicative of the fractions defectives with said extracted supplementary indexes and said workshop index stored in said workshop evaluating step, and synthesizing said supplementarily corrected indexes indicating the fractions defectives throughout a plurality of manufacturing works, to thereby estimate and evaluate the quality indicative of a work-related defective ratio of said product.

14. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

storage means for storing previously a workshop evaluating database created in advance, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively; and

workshop evaluating means for extracting from said workshop evaluating database stored in said storage means said failure occurrence ratio indexes which correspond to workshop facility levels of an inputted evaluation-undergoing manufacturing workshop for the workshop-conditioned failure influential items, respectively, and evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop.

17. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop as set forth in claim 14, further comprising:

outputting means for outputting results of evaluation/estimation as executed by said workshop evaluating means.

15. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

storage means for storing previously a workshop evaluating database created in advance, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

input means for inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for said workshop-conditioned failure influential items, respectively; and

workshop evaluating means for extracting from said workshop evaluating database stored in said storage means said failure occurrence ratio indexes which correspond to workshop facility levels inputted by said input means for the workshop-conditioned failure influential items, respectively, and evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop.

16. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop comprising:

storage means for storing previously a workshop evaluating database created in advance, said workshop evaluating database indicating correspondence relations between workshop-conditioned failure influential items set previously concerning worker(s), manufacturing equipment, manufacturing conditions, physical environment for manufacturing and management on one hand and on the other hand failure occurrences indexes representing failure occurrence suppressing abilities, failure coping time rate indexes representing failure occurrence coping abilities and defective extraction indexes representing failure detecting abilities at least for standard manufacturing works, respectively, at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

input means for inputting at least workshop facility levels of an evaluation-undergoing manufacturing workshop for said workshop-conditioned failure influential items, respectively; and

workshop evaluating means for extracting from said workshop evaluating database stored in said storage means said failure occurrence, failure coping time rate, and defective extraction indexes which correspond to workshop facility levels inputted by said input means for the workshop-conditioned failure influential items, respectively, and evaluating through estimation the failure occurrence likelihood in said evaluation-undergoing manufacturing workshop by totalizing the three extracted indexes for a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically indexes indicating failure occurrence ratios for the standard manufacturing works, respectively, in said evaluation-undergoing manufacturing workshop.

18. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

storage means for storing previously a workshop evaluating database created in advance, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively; and

evaluation means including a workshop evaluating unit designed for extracting from said workshop evaluating database stored in said storage means said failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items thereof, respectively, to thereby evaluate and estimate the failure occurrence likelihood for the standard manufacturing works in said inputted manufacturing workshop by totalizing said extracted failure occurrence ratio indexes over a plurality of concerned workshop-conditioned failure influential items to determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said inputted manufacturing workshop, said failure occurrence likelihood being stored as a workshop index in a product evaluating database stored in said storage means, and a product evaluating unit designed for evaluating and estimating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said inputted manufacturing workshop by using workshop indexes of said manufacturing workshop which are stored in said product evaluating database by said workshop evaluating unit.

19. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

storage means for storing previously workshop evaluating database and a product evaluating database created in advance, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively, while said product evaluating database stores therein indexes indicating defective ratios in a plurality of mutually different standard manufacturing operations, respectively, and supplementary correcting indexes based on properties of component parts involved in individual standard manufacturing operations;

a workshop evaluating unit designed for extracting from said workshop evaluating database stored in said storage means said failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items thereof, respectively, to thereby evaluate and estimate a failure occurrence likelihood for standard manufacturing operations in said inputted manufacturing workshop by totalizing said extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said inputted manufacturing workshop, said failure occurrence likelihood being stored as a workshop index in said product evaluating database stored in said storage means; and

means for extracting the indexes indicating the defective ratios and the supplementary correcting indexes from the product evaluating database stored in said storage means on the basis of a plurality of standard manufacturing operations for manufacturing an inputted product, inclusive of properties of component parts involved in said standard manufacturing operations, respectively; and

evaluating means including a product evaluating unit designed for correcting extracted indexes indicating the defective ratios with said extracted supplementary correcting indexes and synthesizing said corrected indexes indicating the defective ratios over a plurality of manufacturing operations and correcting said synthesized index indicating the synthesized defective ratio with said workshop index stored in said storage means by said workshop evaluating unit to thereby evaluate and estimate a quality indicative of work-related defective ratio of the product.

20. An apparatus for evaluating a failure occurrence likelihood of a manufacturing workshop, comprising:

storage means for storing previously a workshop evaluating database and a product evaluating database created in advance, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively, while said product evaluating database stores therein indexes indicating defective ratios in a plurality of mutually different standard manufacturing operations, respectively, and supplementary correcting indexes based on properties of component parts involved in individual standard manufacturing operations;

a workshop evaluating unit designed for extracting from said workshop evaluating database stored in said storage means said failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items thereof, respectively, to thereby evaluate and estimate a failure occurrence likelihood for the standard manufacturing operations in said inputted manufacturing workshop by synthesizing said extracted failure occurrence ratio indexes for a plurality of concerned workshop-conditioned failure influential items to determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said inputted manufacturing workshop, said failure occurrence likelihood being stored as a workshop index in said produce evaluating database stored in said storage means; and

means for extracting the indexes indicating the defective ratios and the supplementary correcting indexes from the product evaluating database stored in said storage means on the basis of a plurality of standard manufacturing operations for manufacturing an inputted product, inclusive of properties of component parts involved in said manufacturing operations, respectively; and

evaluating means including a product evaluating unit designed for correcting said extracted indexes indicating the defective ratios with said extracted supplementary correcting indexes and said workshop index stored in said storage means by said workshop evaluating unit and synthesizing said corrected indexes indicating the defective ratios over a plurality of manufacturing operations to thereby evaluate and estimate a quality indicative of a work-related defective ratio of the product.

21. A recording medium recording a program for executing the method of evaluating quality of a product, comprising:

a workshop database preparation step of creating previously a workshop evaluating database to be stored for preparation, said workshop evaluating database indicating correspondence relations between a plurality of workshop-conditioned failure influential items set previously and failure occurrence ratio indexes at least for standard manufacturing works at standard workshop facility levels for said workshop-conditioned failure influential items, respectively;

a step of extracting from said workshop evaluating database prepared in said workshop database preparation step those failure occurrence ratio indexes which correspond to workshop facility levels of an inputted manufacturing workshop for the workshop-conditioned failure influential items, respectively;

a workshop evaluation step of evaluating and estimating failure occurrence likelihood in the manufacturing workshop by totalizing the extracted failure occurrence ratio indexes over a plurality of concerned workshop-conditioned failure influential items to thereby determine arithmetically the indexes indicating the failure occurrence ratios for the standard manufacturing works, respectively, in said manufacturing workshop, results of said evaluation and estimation being stored as a workshop index in a product/article evaluating database; and

a product evaluating step of evaluating a quality indicating a work-related defective ratio of a product manufactured through a plurality of manufacturing works in said manufacturing workshop by using the workshop index concerning said manufacturing workshop as stored in the product/article evaluating database in said workshop evaluation step.