El Paso Electric reliability ratings in Texas since 2008:
The System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI) are reliability indices compiled by the Public Utility Commission of Texas (PUCT). The SAIDI measurement rates the duration of outages while the SAIFI measurement measures the frequency of outages. The PUCT tracks the SAIDI and SAIFI of all investor-owned electric utilities operating in Texas, a total of 10. During 2011, EPE’s SAIDI and SAIFI ratings were the best in Texas.