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II.2. System Average Interruption Frequency Index <br />SAIFI is the average instances a customer on the utility system will experience a sustained <br />fn&numduring a speci <br />&nrrd MR isre sustained interruption index, only outages lasting longer than <br />included in the calculations. SAIFI is calculated by dividing the total number of customers that <br />experienced sustained interruptions by the average number of customers served during that <br />period. For example, a utility with 150 customer interruptions and 200 customers would have <br />a SAIFI of 0.75. <br />Note that in the tables below, scheduled and unscheduled calculations include MEs. Also note <br />that wherever MEs are excluded, the exclusion is based on the APPA ME threshold for your <br />system. <br />T&Wm4e SAIFI with and without MEs <br />In interruptions <br />All <br />No MEs <br />Unscheduled <br />Scheduled <br />Your utility <br />0.35 <br />0.14 <br />0.35 <br />NULL <br />Utilities that use the eReliability Tracker <br />0.78 <br />0.54 <br />0.75 <br />0.06 <br />Utilities in your region <br />0.52 <br />0.4 <br />0.51 <br />0.03 <br />Utilities in your size class <br />0.65 <br />0.43 <br />0.63 <br />0.03 <br />%ytefrSary SAIFI data from the eReliability Tracker <br />In interruptions <br />i All No MEs I Unscheduled IScheduled <br />Minimum <br /><0.01 <br /><0.01 <br /><0.01 <br /><0.01 <br />First Quartile <br />0.21 <br />0.14 <br />0.19 <br /><0.01 <br />Median <br />0.54 <br />0.36 <br />0.53 <br />0.01 <br />Third Quartile <br />1.16 <br />0.77 <br />1.1 <br />0.04 <br />Maximum <br />3.63 <br />2.43 <br />3.63 <br />2.32 <br />:1 <br />