Spurious Failure

failure triggering an action in an untimely manner

Note 1 to entry: Critical safe failures (see Figure B.1) are the typical spurious failures related to safety systems.

Note 2 to entry: A spurious failure does not necessarily imply a spurious trip (3.4.14) but a spurious trip is always

the result of a spurious failure.



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

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