CAIFI

The Customer Average Interruption Frequency Index (CAIFI)^[1] is a popular reliability index used in the reliability analysis of an electric power system.^[2] It is designed to show trends in customers interrupted and helps to show the number of customers affected out of the whole customer base.

${\mbox{CAIFI}}={\frac {\mbox{Total Number of Customer Interruptions}}{\mbox{Number of Distinct Customers Interrupted}}}$

References

^ Yeddanapudi, Sree. "Distribution System Reliability Evaluation". Iowa State University. Archived from the original on 26 December 2011. Retrieved 18 June 2011.
^ Power Distribution Planning Reference Book, H. Lee Willis, published by CRC Press, 2004, page 112

[1] Yeddanapudi, Sree. "Distribution System Reliability Evaluation". Iowa State University. Archived from the original on 26 December 2011. Retrieved 18 June 2011.

[2] Power Distribution Planning Reference Book, H. Lee Willis, published by CRC Press, 2004, page 112

[1]

[2]

v t e Reliability indices
Generic	MTBF MTTR FOR EFOR
Electricity distribution	ASUI ASAI CAIDI/SAIDI CAIFI/SAIFI MAIFI CTAIDI
Electricity generation	LOLP LOLE LOLEV LOLF LOLH