Laserfiche WebLink
2008 9067 155,768 57 <br /> 2009 9170 46,706 49 <br /> 2010 9207 526,144 77 <br /> 2011 9576 297,359 51 <br /> 2012 9285 71,496 57 <br /> 2013 9285 55,451 31 <br /> 2014 9426 243,965 44 <br /> A number of reliability indexes are used in the electric industry to make it easier to compare <br /> performance of electric utilities. Listed below are the reliability indexes along with ERMU's <br /> 2013 and 2014 statistics. Also included are APPA's published averages that can be used by <br /> utilities to better understand the performance of their electric system relative to other utilities <br /> nationally and to those within their region or size class. <br /> Average Service Availability Index (ASA!) <br /> ASAI is a measure of the average availability of the sub-transmission and distribution systems to <br /> serve customers. It is the ratio of the total customer minutes that service was available to the total <br /> customer minutes available in a time period. This is normally expressed as a percentage. <br /> ERMU's 2014 ASAI is 99.9945%Availability ERMU's 2013 ASAI was 99.999%Availability <br /> Our utility's ASAI: 99.9945 <br /> Average ASAI for Utilities Within our Region 99.9894 <br /> Average ASAI for Utilities Within our Customer Size Class 99.9834 <br /> Customer Average Interruption Duration Index(CAIDI) <br /> CAIDI is defined as the average duration (in minutes) of an interruption experienced by customers <br /> during a specific time frame. It is calculated by summing the customer minutes off during each <br /> interruption in the time period and dividing this by the number of customers experiencing one or more <br /> sustained interruptions during the time period. The resulting unit is minutes. The index enables utilities to <br /> report the average duration of a customer outage for those customers affected. <br /> ERMU's 2014 CAIDI is 199.883 minutes ERMU's 2013 CAIDI was 118.23 minutes <br /> Our utility's CAIDI: 199.8838 <br /> Average CAIDI for Utilities Within our Region 95.2256 <br /> Average CAIDI for Utilities Within our Customer Size Class 107.7752 <br /> System Average Interruption Duration Index(SAID!) <br /> SAIDI is defined as the average interruption duration for customers served during a specified time <br /> period. It is determined by summing the customer minutes off for each interruption during a specified <br /> time period and dividing that sum by the average number of customers served during that period. The <br /> • POWERED 8 1 <br /> Page 2 of 3 NATURE <br /> Reliable Public <br /> Power Provider P 0 WE 0.E D T O S E R V E <br /> 50 <br />