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The failure probability of components in three-state networks with applications to age replacement policy

  • S. Ashrafi (a1) and M. Asadi (a2)

Abstract

In this paper we investigate the stochastic properties of the number of failed components of a three-state network. We consider a network made up of n components which is designed for a specific purpose according to the performance of its components. The network starts operating at time t = 0 and it is assumed that, at any time t > 0, it can be in one of states up, partial performance, or down. We further suppose that the state of the network is inspected at two time instants t 1 and t 2 (t 1 < t 2). Using the notion of the two-dimensional signature, the probability of the number of failed components of the network is calculated, at t 1 and t 2, under several scenarios about the states of the network. Stochastic and ageing properties of the proposed failure probabilities are studied under different conditions. We present some optimal age replacement policies to show applications of the proposed criteria. Several illustrative examples are also provided.

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Corresponding author

* Postal address: Department of Statistics, University of Isfahan, Isfahan, 81744, Iran.
** Email address: s.ashrafi@sci.ui.ac.ir
*** Email address: m.asadi@sci.ui.ac.ir

References

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Journal of Applied Probability
  • ISSN: 0021-9002
  • EISSN: 1475-6072
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