https://en.formulasearchengine.com/w/api.php?action=feedcontributions&feedformat=atom&user=80.236.246.141formulasearchengine - User contributions [en]2026-10-02T04:13:27ZUser contributionsMediaWiki 1.47.0-wmf.7https://en.formulasearchengine.com/w/index.php?title=Central_limit_theorem_for_directional_statistics&diff=26714Central limit theorem for directional statistics2013-11-03T00:05:04Z<p>80.236.246.141: </p>
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<div>The '''Average Service Unavailability Index (ASUI)'''<ref name="Pham2003">{{cite book|last=Pham|first=Hoang|title=Handbook of reliability engineering|url=http://books.google.com/books?id=Xe6Z4wKQFMoC&pg=PA514|accessdate=21 July 2011|date=8 April 2003|publisher=Birkhäuser|isbn=978-1-85233-453-6|pages=514}}</ref> is a reliability index commonly used by [[electric power]] [[utilities]]. It is calculated as<br />
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<math>\mbox{ASUI} = \frac{\sum{U_i N_i}}{\sum{N_i} \times 8760} = 1- \mbox{ASAI}</math><br />
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where <math>N_i</math> is the number of customers and <math>U_i</math> is the annual outage time (in hours) for location <math>i</math>. ASUI can be represented in relation to [[SAIDI]] (where annual SAIDI is given in hours) as<br />
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<math>\mbox{ASUI} = \frac{\mbox{SAIDI}}{8760}</math><br />
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==See also==<br />
*[[ASAI]]<br />
*[[SAIDI]]<br />
*[[SAIFI]]<br />
*[[CAIDI]]<br />
*[[CAIFI]]<br />
*[[MAIFI]]<br />
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==References==<br />
{{Reflist}}<br />
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[[Category:Electric power distribution]]</div>80.236.246.141