Reliability Analysis of Coherent Systems with Exchangeable Components

  • M. V. KoutrasEmail author
  • I. S. Triantafyllou
Part of the Springer Optimization and Its Applications book series (SOIA, volume 91)


In this paper we study reliability properties of coherent systems consisting of n exchangeable components. We focus on the aging behavior of a reliability structure and several results are reached clarifying whether a system displays the IFR/DFR property or not. More specifically, a necessary and sufficient condition is deduced for a system’s lifetime to be IFR, while additional signature-based conditions aiming at the same direction are also delivered. For illustration purposes, special cases of well-known reliability systems and specific lifetimes’ distributions are considered and studied in detail.


Coherent systems Increasing failure rate Samaniego’s signature Minimal and maximal signatures 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of Statistics and Insurance ScienceUniversity of PiraeusPiraeusGreece

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