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    Probabilistic Safety Value Analysis


    Nadine Cranenburgh

    Introduction

    Probabilistic Safety Value Analysis is a process that uses the Reliability, Availability, Maintainability and Safety (RAMS) process combined with Fault Tree Analysis (FTA).

    It is designed to achieve the following objectives:

    • evaluate the soundness of a system
    • check if all safety requirements are fulfilled (using RAMS)
    • create a better understanding of context, causes and effects
    • evaluate critical failure combinations (Minimal Cut Sets) 
    • provide a description of potential for optimisation via comprehensive assessment 
    • support probabilistic methods to model uncertainty

    Outcomes 

    Based on the results of probabilistic safety value analysis, measures can be taken to optimise the system such as: 

    • optimisation of the system structure
    • creation of additional redundancies
    • replacement of particularly susceptible components with more robust components
    • installation of monitoring systems to detect faults at an early stage
    • adjustment of maintenance intervals and scope 
    • avoidance of common cause failures.

    Sources
    The information on this page was primarily sourced from:

    • Text provided by Taylor Burns, Project Engineer, RiskConsult, GmbH
    • Peer review conducted by Pedram DaneshMand, Director, Project Risk Consulting, Audit, Assurance & Risk Consulting, KPMG
    • RiskConsult RIAAT Software RAMS Analysis webpage, 2019.
       

    Edited by Nadine Cranenburgh

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