A study on utilization of two cold standby components to increase reliability of a coherent system

Achintya Roy and Nitin Gupta

Communications in Statistics - Theory and Methods, 2025, vol. 54, issue 2, 324-351

Abstract: This article focuses on a specific type of coherent system in which, when the coherent system fails, either no active component remains or the remaining active components are connected in parallel. Roy and Gupta (2023) also considered the same type of coherent systems. We observe the restart of such a coherent system using two cold standby components. In our study, standbys are not placed into action simultaneously. They are put into action one by one. We compute the reliability function of the considered coherent system, which is equipped with two cold standby components. In addition, we show that when we use a stronger standby component (in the sense of failure rate order) at first, we get a longer system lifetime. Also, we compute three different mean residual life functions of the system. We have presented a few numerical results to illustrate the importance of our analysis.

Date: 2025
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DOI: 10.1080/03610926.2024.2309981

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