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IEVref:192-08-08ID:
Language:enStatus: Standard
Term: steady state unavailability
Synonym1: asymptotic unavailability
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Symbol: U
Definition: limit, if it exists, of the instantaneous unavailability when the time tends to infinity

Note 1 to entry: Under certain conditions the steady state unavailability may be expressed as the ratio of the mean down time to the sum of the mean up time and mean down time. See IEC 61703, Mathematical expressions for reliability, availability, maintainability and maintenance support terms.


Publication date:2015-02
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