Robinson and Anderson (2005) outline seven different risk paradigms in support of the Rule of Law tests of causation, foreseeability, preventability and reasonableness:(i) Threat and Vulnerability top-down techniques such as Strength-Weakness-Opportunity-Threat (SWOT), Dependence Diagram (DD), Fault Tree Analysis (FTA), and Markov Analysis (MA). (ii) Asset-based bottom-up approaches such as Hazard and Operability Study (HAZOP) and Failure Mode Effects and Criticality Analysis (FMECA). (iii) Historical evidence of loss expectancv/loss prevention through insurance. (iv) Demonstration of good practice through cause-consequence modelling to show that sensible precautions are in place to cover all credible threats. (v) Consideration of risk taking where there is a prospect of gain as opposed to pure unwanted events. (vi) Human factors and risk culture considerations using Root Cause Analysis. (vii) Sensitivity testing through scenario simulation modelling. This paper describes the application of the 'top down' paradigm using an example set on an offshore platform. In conclusion, the need to put in place sensible precautions against ALL credible threats means that no one measure or technique will suffice to provide all of the 'evidence' of system safety assurance. The top-down methodologies related to the four rule-of-law tests provide a first cut of the overall safety argument, with the other paradigms adding to the evidence.


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    Title :

    Common law safety case approaches to safety critical systems assurance


    Additional title:

    Gewohnheitsrechtbasierte Sicherheitssystemlösungen für sicherheitskritische Systeme


    Contributors:


    Publication date :

    2006


    Size :

    13 Seiten, 3 Bilder, 7 Tabellen, 2 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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