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II.5. Average Service Availability Index <br />ASAI is the percentage of time the sub -transmission and distribution systems are available to serve <br />fid§#wrfev rcturing a speci <br />This load -based index represents the percentage availability of electric service to customers <br />within the period analyzed. It is calculated by dividing the total hours in which service is <br />available to customers by the total hours that service is demanded by the customers. For <br />example, an ASAI of 99.99% means that electric service was available for 99.99% of the time <br />during the given period. Note that the higher your ASAI value, the better the performance. <br />In the tables below, scheduled and unscheduled calculations include MEs. Also note that <br />wherever MEs are excluded, the exclusion is based on the APPA ME threshold for your system. <br />Table 10. Average ASAI with and without MEs <br />In percentage <br />All <br />No MEs <br />Unscheduled <br />Scheduled <br />Your utility <br />99.992 <br />99.9981 <br />99.992 <br />NULL <br />Utilities that use the eReliability Tracker <br />99.9775 <br />99.9898 <br />99.9787 <br />99.9976 <br />Utilities in your region <br />99.9905 <br />99.9939 <br />99.9907 <br />99.9994 <br />Utilities in your size class <br />99.9817 <br />99.9924 <br />99.9823 <br />99.9991 <br />Table 11. Summary ASAI data from the eReliability Tracker <br />In percentage <br />All <br />I No MEs <br />Unscheduled <br />Scheduled <br />Maximum <br />99.9999 <br />99.9999 <br />99.9999 <br />99.9999 <br />First Quartile <br />99.9963 <br />99.9978 <br />99.9964 <br />99.9999 <br />Median <br />99.9916 <br />99.9949 <br />99.9922 <br />99.9997 <br />Third Quartile <br />99.9755 <br />99.9894 <br />99.9765 <br />99.999 <br />Minimum <br />99.6888 <br />99.86 <br />99.6899 <br />99.8856 <br />