Physics:CAIFI

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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.

[math]\displaystyle{ \mbox{CAIFI} = \frac{\mbox{Total Number of Customer Interruptions}}{\mbox{Number of Distinct Customers Interrupted}} }[/math]

References