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Reliability analysis of a two-unit‏ ‏standby system under Marshall–Olkin dependency

Afshin Yaghoubi (Department of Industrial Engineering, Sharif University of Technology, Tehran, Iran)
Seyed Taghi Akhavan Niaki (Department of Industrial Engineering, Sharif University of Technology, Tehran, Iran)

International Journal of Quality & Reliability Management

ISSN: 0265-671X

Article publication date: 12 December 2022

21

Abstract

Purpose

One of the common approaches to improve systems reliability is using standby redundancy. Although many works are available in the literature on the applications of standby redundancy, the system components are assumed to be independent of each other. But, in reality, the system components can be dependent on one another, causing the failure of each component to affect the failure rate of the remaining active components. In this paper, a standby two-unit system is considered, assuming a dependency between the switch and its associated active component.

Design/methodology/approach

This paper assumes that the failures between the switch and its associated active component follow the Marshall–Olkin exponential bivariate exponential distribution. Then, the reliability analysis of the system is done using the continuous-time Markov chain method.

Findings

The derived equations application to determine the system steady-state availability, system reliability and sensitivity analysis on the mean time to failure is demonstrated using a numerical illustration.

Originality/value

All previous models assumed independency between the switch and the associated active unit in the standby redundancy approach. In this paper, the switch and its associated component are assumed to be dependent on each other.

Keywords

Acknowledgements

The authors are thankful for the construction comments provided by the reviewers. Taking care of the comments improved the presentation of this paper significantly.

Citation

Yaghoubi, A. and Niaki, S.T.A. (2022), "Reliability analysis of a two-unit‏ ‏standby system under Marshall–Olkin dependency", International Journal of Quality & Reliability Management, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/IJQRM-11-2020-0366

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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