SAIDI is measured in units of time, often minutes or hours; it is usually measured over the course of a year. According to IEEE Standard 1366–1998, the median value for North American utilities is …

Oct 4, 2025 · SAIDI (minutes/customer/year): average total outage duration a customer experiences. SAIFI (interruptions/customer/year): average number of outages a customer experiences.

SAIDI (System Average Interruption Duration Index) represents the total number of minutes of interruption the average customer experiences. SAIDI is calculated by dividing the sum of all …

Learn about SAIFI, SAIDI, and MAIFI, key reliability indices for electrical distribution systems. Understand their calculation and application.

SAIFI = System Average Interruption Frequency Index. It is the number of non-momentary electric interruptions, per year, the average customer experienced. CAIDI = Customer Average Interruption …

Jun 2, 2025 · SAIDI reflects the average total duration of interruptions for each customer served, while SAIFI measures how often the average customer experiences an interruption.

Jun 13, 2024 · The unit of measure for SAIDI is minutes of interruption per customer. A lower SAIDI value indicates better reliability, as it means customers experienced shorter total outage durations on...

In this report, we break down the meaning of some important metrics (commonly referred to via acronym) used by the Federal Energy Regulatory Commission, along with utilities themselves, when …

Jun 13, 2025 · SAIDI stands for System Average Interruption Duration Index. It measures the average duration of power interruptions experienced by customers over a specific period.

The most often used performance measurement for a sustained interruption is the System A verage Interruption Duration Index (SAIDI). This index measures the total duration of an interruption for the …