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Independant safety Assesment - Level of Independance?

John Pittwood
What level of independance is required?



This came up in a recent conversation. It should be appropriate to the risk but at the back of my mind I seem to recal a table the went from



SIL4         Totally seperate organisation



Down to an individual from a different department.



Not having been involved directly in this area for some time is this still true?



Are the levels common or do they vary from Standard to Standard?



Regards
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    Vinod

    Although I understand your sentiments, to meet the requirements of products marketed in Europe (as required by the CE mark) ALL a manufacturer needs to do for functional safety is to follow EN 62061 or EN ISO 13849. They do NOT have to meet any requirements of EN 61508 and as such dont have to apply the level of independance stated above even though many (if not all functional safety experts) would recommend these levels of independance.
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  • 0
    Vinod

    Although I understand your sentiments, to meet the requirements of products marketed in Europe (as required by the CE mark) ALL a manufacturer needs to do for functional safety is to follow EN 62061 or EN ISO 13849. They do NOT have to meet any requirements of EN 61508 and as such dont have to apply the level of independance stated above even though many (if not all functional safety experts) would recommend these levels of independance.
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