Conservative reliability assessment of a 2-channel software system when one of the channels is probably perfect

Peter Popov

Reliability Engineering and System Safety, 2021, vol. 216, issue C

Abstract: In this paper we subject to scrutiny some recent advances in conservative reliability assessment of 2-channel fault-tolerant software, based on the probability of perfection of one of the channels. Our approach extends the previous works by looking in detail at the implications of the assumptions made in these previous works about the relationships between the probability of failure of the channels and of the system, which have not been explored before. We demonstrate that the assumptions made by others impose significant constraints on the epistemic uncertainty of the probability of system failure and explore the implications of these constraints to derive new conservative bounds.

Keywords: Bayesian inference; protection system; two-channel software system; black-box and white-box models; probability of failure on demand; probability of perfection; epistemic uncertainty (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:216:y:2021:i:c:s0951832021005172

DOI: 10.1016/j.ress.2021.108008

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