Transformation semigroup

The Customer Average Interruption Frequency Index (CAIFI) is a popular index used in electrical reliability analysis. It is designed to show trends in customers interrupted and helps to show the number of customers affected out of the whole customer base.

$\text{CAIFI}=\frac{\text{total number of customer interruptions}}{\text{total number of customers who had at least one interruption}}$

References

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See also

• SAIDI
• CAIDI
• MAIFI
• SAIFI