Dangerous Failure

unsafe failure

failure of a safety system which tends to impede a given safety action

Note 1 to entry: This is a systemic failure in relationship with a given safety action performed by the safety

system. Therefore this concept is irrelevant for an individual item on the shelves.

Note 2 to entry: See Figure B.1.



Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards

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