ASUI

The Average Service Unavailability Index (ASUI)[1] is a reliability index commonly used by electric power utilities. It is calculated as

\mbox{ASUI} = \frac{\sum{U_i N_i}}{\sum{N_i} \times 8760} = 1- \mbox{ASAI}

where N_i is the number of customers and U_i 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

\mbox{ASUI} = \frac{\mbox{SAIDI}}{8760}

See also

References

  1. ↑ Pham, Hoang (8 April 2003). Handbook of reliability engineering. Birkhäuser. p. 514. ISBN 978-1-85233-453-6. Retrieved 21 July 2011.