In 2013, the World Bank’s Energy Sector Management Assistance Program (ESMAP) introduced the multi-tier framework (MTF) which tries to address the classification of energy access. Instead of having a binary classification of access or no access (similar to served or unserved areas), they proposed a six-tier classification based on capacity, duration, reliability, quality, affordability, legality, and health and safety.
Among the ASEAN countries, Cambodia and Myanmar have already collected and published data with this approach (UN ESCAP, ACE (2020). Regional Energy Trends 2019 – Tracking SDG7 in ASEAN Region).