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Journal of Korean Society for Quality Management > Volume 20(2); 1992 > Article
Journal of Korean Society for Quality Management 1992;20(2): 44-.
Fuzzy Sets을 이용한 시스템 부품의 고장가능성 진단에 관한 모델
김길동1, 조암2
1동국대학교 대학원 산업공학과
2동국대학교 공과대학 산업공학과
The possibility of failure of system component by fuzzy sets
Gil-Dong Kim1, Am Jo2
In conventional fault-tree analysis, the failure probabilities of components of a system are treated as exact values in estimating the failure probability of the top event. For the plant layout and systems of the products, however, it is often difficult to evaluate the failure probabilities of components from past occurences, because the environments of the systems change. Furthermore, it might be necessary to consider possible failure of components of the systems even if they have never failed before. In the paper, instead of the probability of failure, we propose the possibility of failure, viz, a fuzzy set defined in probability space. Thus, in this paper based on a fuzzy fault-tree model, the maximum possibility of system failure is determined from the possibility of failure of each component within the system according to the extension principle.
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