Failure (ITILv3):    [Service Operation] Loss of ability to Operate to Specification, or to deliver the required output. The term Failure may be used when referring to IT Services, Processes, Activities, Configuration Items, etc. A Failure often causes an Incident.

See also: TBD

Failure (ITILv2):    A Failure occurs when a functional unit is no longer fit for purpose.

See also: TBD

Failure (ITILv1):    The termination of the ability of a functional unit to perform its required function.

See also: TBD

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