Central limit theorem for directional statistics

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

$\text{ASUI}=\frac{\sum U_i{N}_i}{\sum N_i\times 8760}=1-\text{ASAI}$

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

$\text{ASUI}=\frac{\text{SAIDI}}{8760}$

See also

• ASAI
• SAIDI
• SAIFI
• CAIDI
• CAIFI
• MAIFI

References

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