Page 75 - U4SSC KPIs Verification Manual - A guide for verifiers

Dimension Economy
Sub-Dimension Infrastructure

Category Electricity Supply
KPI Name Electricity System Outage Frequency
KPI No. EC: I: ES: 1C Type: Core Type: Structural

Definition / Average number of electrical interruptions per customer per year
Description

Rationale / The reliability of the electricity network is vital for long-term economic sustainability
Interpretation / of a city.
Benchmarking
System Average Interruption Frequency Index (SAIFI) is used as a standard
reliability indicator by electric power utilities globally. SAIFI is the average number
of interruptions that a customer would experience over a specific time period, and
is calculated as:

λ is the failure rate
i
N is the number of customers
i
Data should be reported for a 12-month period.
Methodology Calculate as:
Numerator: Sum of customer interruptions.
Denominator: Total number of customers served.

Unit Number
Data Sources NOTE – Data can be provided by the local electrical utility.
/ Relevant IEEE Standard 1366-1998. Retrieved from <https:// www .ieee .org/ standards/ index
Databases
.html>
SDG Reference(s) SDG Target 7.1: By 2030, ensure universal access to affordable, reliable and modern
energy services.
Verification Check data source – should be from electrical utility.
Guidance

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