Fuzzy Testing for Lifetime Performance Index of Products with Exponential Distribution  
Author Kuen-Suan Chen


Co-Author(s) Tsang-Chuan Chang


Abstract Product lifetime, a time-oriented quality characteristic, generally follows an exponential distribution or other associated non-normal distributions. The lifetime performance index CL was thus developed to gauge the lifetime performance of products, and most related studies use the precise values of time data to evaluate product lifetime. However, in practice, measurement errors may hinder the accuracy of the observed values of quality characteristics, and the time at which the lifetime of a product ends becomes imprecise, which may result in uncertainty in the evaluation method and lead to errors in judgment. For this reason, this study thus proposes a triangular shaped fuzzy number for * L C to deal with imprecise data, and further develops a fuzzy testing model for lifetime performance index CL, to assist manufacturers in evaluating product lifetime performance more cautiously and precisely.


Keywords Exponential distribution, Lifetime performance index, Triangular shaped fuzzy number, Fuzzy testing
    Article #:  RQD25-92
Proceedings of 25th ISSAT International Conference on Reliability & Quality in Design
August 1-3, 2019 - Las Vegas, NV, U.S.A.