Using fuzzy sets to evaluate the performance of complex systems when parameters are uncertain

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

Nunes, EM (Author) Other; José António Faria (Author) FEUP; Manuel Matos (Author) FEUP

Conference proceedings International

Title: Safety and Reliability for Managing Risk, Vols 1-3

Pages: 2351-2359

European Safety and Reliability Conference (ESREL 2006)

Estoril, PORTUGAL, SEP 18-22, 2006

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-004-QQZ

Abstract (EN): Reliability models rarely incorporate the uncertainty that is present in most of the reliability parameters, which is an important limitation for the managers of production system. This paper presents a fuzzy-probabilistic methodology that was developed to analyse production systems. The methodology employs probabilistic theory to represent the stochastic behaviour of the failure and repair processes and fuzzy sets to represent uncertainty in the parameters. This approach is based on a fuzzy reliability analysis from which is possible to obtain the fuzzy downtime function of a system in a given period of analysis. This function is a crucial element to obtain two performance measures: a financial measure (the fuzzy cost concerning failures of a production system) and a quality of service measure (the fuzzy frequency of failure on deliveries), as it will be illustrated in the final part of the paper through a practical example.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9