IEC 60050 - International Electrotechnical Vocabulary


IEVref:	192-08-06	ID:
Language:	en	Status: Standard

Term:	mean unavailability
Synonym1:	average unavailability [Preferred]
Synonym2:
Synonym3:
Symbol:	$\overset{Ż}{U} (t_{1}, t_{2})$
Definition:	average value of the instantaneous unavailability over a given time interval (t₁, t₂) Note 1 to entry: The mean unavailability is related to the instantaneous unavailability U(t) as: $\overset{Ż}{U} (t_{1}, t_{2}) = \frac{1}{t_{2} - t_{1}} \int_{t_{1}}^{t_{2}} U (t) d t$
Publication date:	2015-02
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Internal notes:	2017-06-02: Cleanup - Remove Attached Image 192-08-061.gif
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