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