The number of failure events that occur divided by the total elapsed operating time during which these event occur or by the total number of demands, as applicable.
The probability - a value from 0 to 1 - that a piece of equipment will fail on demand (not to be confused with fractional dead time) or will fail in a given time interval.
A hazard identification technique in which all known failure modes of components or features of a system are considered in turn and undesired outcomes are noted.
Manner in which failure occurs. A failure mode might be identified as loss of function; spurious operation (function without demand); an out-of-tolerance condition; or a simple physical characteristic such as a leak observed during inspection.
The number of failure events that occur divided by the total elapsed calendar time during which those events occur or by the total number of demands, as applicable.
