On the stochastic and dependence properties of the three-state systems

S. Ashrafi () and Mehdi Asadi

Metrika: International Journal for Theoretical and Applied Statistics, 2015, vol. 78, issue 3, 281 pages

Abstract: Suppose that a system has three states up, partial performance and down. We assume that for a random time $$T_1$$ T 1 the system is in state up, then it moves to state partial performance for time $$T_2$$ T 2 and then the system fails and goes to state down. We also denote the lifetime of the system by $$T$$ T , which is clearly $$T=T_1+T_2$$ T = T 1 + T 2 . In this paper, several stochastic comparisons are made between $$T$$ T , $$T_1$$ T 1 and $$T_2$$ T 2 and their reliability properties are also investigated. We prove, among other results, that different concepts of dependence between the elements of the signatures (which are structural properties of the system) are preserved by the lifetimes of the states of the system (which are aging properties of the system). Various illustrative examples are provided. Copyright Springer-Verlag Berlin Heidelberg 2015

Keywords: Two-dimensional signature; Upper orthant ordering; Positively quadrant dependent; Association; Reliability; Multi-state system (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1007/s00184-014-0501-0

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