However, in 2005, a general increase in the interruption duration happened.

However, more recently ETSA has consistently met and often exceeded it's requirements for service interruption duration and frequency.

The rankings are based on interruption frequency and interruption duration compared to a peer group constructed by the Edison Electric Institute.

The System Average Interruption Duration Index (SAIDI) was as low as 1.04 minutes.

The System Average Interruption Duration Index (SAIDI) is commonly used as a reliability indicator by electric power utilities.

Assembling and dispatching crews faster can reduce storm CAIDI (customer average interruption duration index) by up to 30 minutes because crews get to the scene of trouble faster.

The two national indexes are System Average Interruption Frequency Index SAIFI and System Average Interruption Duration Index SAIDI.