ASUI

The Average Service Unavailability Index (ASUI)[1] is a reliability index commonly used by electric power utilities. It is calculated as ASUI=∑UiNi∑Ni×8760=1−ASAI

where Ni is the number of customers and Ui is the annual outage time (in hours) for location i. ASUI can be represented in relation to SAIDI (where annual SAIDI is given in hours) as

ASUI=SAIDI8760

## See also

* Average Service Availability Index (ASAI)
* ASIDI
* ASIFI
* ASUI
* CAIDI
* CAIFI
* CTAIDI
* MAIFI
* SAIDI
* SAIFI

## References

1. ↑ Pham, Hoang (8 April 2003). Handbook of reliability engineering. Birkhäuser. pp. 514. ISBN 978-1-85233-453-6. https://books.google.com/books?id=Xe6Z4wKQFMoC&pg=PA514. Retrieved 21 July 2011.

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