Performance-based ranking and selection of complex coherent systems

Debasis Bhattacharya and Soma Roychowdhury ()
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Debasis Bhattacharya: Visva-Bharati University
Soma Roychowdhury: Indian Institute of Social Welfare and Business Management

International Journal of System Assurance Engineering and Management, 2016, vol. 7, issue 1, No 10, 82-89

Abstract: Abstract Ranking of competing systems and selecting the best according to some performance measure is an important issue to the reliability engineers. It is quite common to consider the reliability, a function of life-lengths of systems, to be an appropriate performance measure. Here the limitations of direct method and signature based method of comparison have been elaborated. It has been seen that the reliability analysis becomes difficult for complex systems of higher orders. It is not possible for the signature based method to compare the systems with different orders. Moreover, the assumption of independence of component lifetimes, though works well in some cases, may not necessarily be valid always in real-life situations. The minimal cut set-based method of comparison discussed here is capable of combating with the limitations of the above methods and suggests a simple, useful method enabling comparison of the simple or complex systems of same or different orders, with independent or dependent component lives. Examples have been included to illustrate the method.

Keywords: Coherent system; Dependent component lives; Minimal cut set; Stochastic ordering; System life; Primary 90B25; 60E15; 60K10; Secondary 62N05; 62P30 (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s13198-014-0330-6

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