Average Service Availability Index

The Average Service Availability Index (ASAI)^[1][2] is a reliability index commonly used by electric power utilities. ASAI is calculated as

${\displaystyle {\mbox{ASAI}}={\frac {\sum {N_{i}}\times 8760-\sum {U_{i}N_{i}}}{\sum {N_{i}}\times 8760}}}$

where $N_{i}$ is the number of customers and $U_{i}$ is the annual outage time (in hours) for location $i$. ASAI can be represented in relation to SAIDI (when the annual SAIDI is given in hours)

${\displaystyle {\mbox{ASAI}}=1-{\frac {\mbox{SAIDI}}{8760}}}$

Professional bodies and qualifications

• American Society of Architectural Illustrators

The American Society of Architectural Illustrators, ASAI, is an international non-profit organization dedicated to the advancement and recognition of the art, science and profession of architectural illustration. Through communication, education and advocacy, the Society strives to refine and emphasize the role of illustration in the practice and appreciation of architecture.

See also

• ASAI
• ASIDI
• ASIFI
• ASUI
• CAIDI
• CAIFI
• CTAIDI
• MAIFI
• SAIDI
• SAIFI

References

1. Yeddanapudi, Sree. "Distribution System Reliability Evaluation". Iowa State University. Retrieved 18 June 2011.
2. Pham, Hoang (8 April 2003). Handbook of reliability engineering. Birkhäuser. p. 514. ISBN 978-1-85233-453-6. Retrieved 21 July 2011.

Sources

• http://www.asai.org/