Human and organisational factors in the operational phase of safety instrumented systems: A new approach

M.A.H. Schönbeck, M. Rausand, J.L. Rouvroye

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    44 Citations (Scopus)
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    Abstract

    The international standards IEC 61508 and IEC 61511, which provide a general framework for the design and implementation of safety instrumented systems, require quantification of the achieved risk reduction, expressed as a safety integrity level (SIL). Human and organisational factors affect the performance of safety instrumented systems during operation and may threaten the achieved SIL, but this is usually not explicitly accounted for. This article presents a new approach to address human and organisational factors in the operational phase of safety instrumented systems. This approach gives a prediction of the operational SIL and can also be used to improve safety. It shows which human and organisational factors are most in need of improvement and it provides guidance for preventive or corrective action. Finally, the approach can be used as part of a SIL monitoring strategy in order to maintain the achieved SIL at there quired level during the operational phase
    Original languageEnglish
    Pages (from-to)310-318
    Number of pages9
    JournalSafety Science
    Volume48
    Issue number3
    DOIs
    Publication statusPublished - 2010

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