ISO 50049:2020

This document gives guidelines for methods for analysing changes in energy efficiency and energy consumption, and for measuring energy efficiency progress, for countries, regions and cities. It is composed of three different calculation methods:
- evaluation of structure effects in the variation of energy intensity;
- calculation of energy efficiency indices;
- decomposition analysis of energy consumption variation.
This document is applicable to providing an aggregated statistical evaluation for a country, region or city. It does not apply to calculating changes in the energy consumption or in energy efficiency at the individual consumer's level (e.g. households, organizations, companies).