Laserfiche WebLink
II.1. System Average Interruption Duration Index (SAIDI) <br />SAIDI is defined as the average interruption duration (in minutes) for customers served by the utility <br />system during a specific time period. <br />Since SAIDI is a sustained interruption index, only outages lasting longer than five minutes are included in <br />1 <br />the calculations. SAIDI is calculated by dividing the sum of all customer minutes of interruption within the <br />specified time frame by the average number of customers served during that period. For example, a utility <br />with 100 customer minutes of interruption and 100 customers would have a SAIDI of 1. <br />Note that in the tables below, scheduled and unscheduled calculations include major events. Also note <br />that wherever major events are excluded, the exclusion is based on the APPA major event threshold. <br />Table 2. Average SAIDI for all utilities that use the eReliability Tracker (with and without MEs), <br />belong to your region, and are grouped in your customer size class <br />AllNo MEsUnscheduledScheduled <br />Your utility's SAIDI 25.4125.4125.41NULL <br />Average eReliability Tracker SAIDI116.7355.63110.0810.74 <br />Average SAIDI for Utilities Within Your Region75.2341.3873.452.64 <br />Average SAIDI for Utilities Within Your Customer Size Class124.0748.59121.343.79 <br />Table 3. Summary statistics of the SAIDI data compiled from the eReliability Tracker <br />AllNo MEsUnscheduledScheduled <br />Minimum Value0.000.000.000.00 <br />First Quartile (25th percentile)21.8411.5620.320.18 <br />Median Quartile (50th percentile)56.5726.8154.880.91 <br />Third Quartile (75th percentile)111.8662.19110.544.65 <br />Maximum Value1197.79988.991165.45988.99 <br />300 <br />259.35 <br />250231.51 <br />200 <br />156.06 <br />149.02 <br />150 <br />104.5 <br />92.0292.41 <br />100 <br />75.23 <br />47.48 <br />Average SAIDI (minutes) <br />50 <br />0 <br />12345678910 <br />Association Regions <br />Figure 3. Average SAIDI for all utilities that use the eReliability Tracker per region <br />1Customer minutes of interruption is calculated by multiplying total customers interrupted and total minutes of interruption. <br />5 <br />59 <br />