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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6159

Title: Modeling demand rate and imperfect proof-test and analysis of their effect on system safety
Authors: KUMAR, M
VERMA, AK
SRIVIDYA, A
Keywords: iec-61508
Issue Date: 2008
Publisher: ELSEVIER SCI LTD
Citation: RELIABILITY ENGINEERING & SYSTEM SAFETY, 93(11), 1720-1729
Abstract: Quantitative safety assessment of a safety system plays an important role in comparing design alternatives at design stage and deciding appropriate design options to apply for safety systems. There are a number of such indices given in the literature. Most of the safety indices consider only system parameters (hazard rate, repair rate, diagnosis, coverage, etc.) along with proof-tests (or inspection). This paper extends the underlying model to incorporate demand rate and imperfect proof-tests. It also introduces a new safety index, average probability of failure on actual demand (PFaD), and an availability index, manifested availability (mAv). This paper uses Markov regenerative process-based analysis for state probabilities. Based on state-probability values of various states of the underlying Markov chain, solutions are derived for safety index PFaD and availability mAv. (c) 2008
URI: http://dx.doi.org/10.1016/j.ress.2007.12.001
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6159
http://hdl.handle.net/10054/6159
ISSN: 0951-8320
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