UN Tier Classification
SDG indicators are globally classified into 3 tiers. Definitions of those tiers can be viewed here.
| Type | Methodology and standards | Data |
|---|---|---|
| Tier 1 | Well established and available | Data regularly produced by countries |
| Tier 2 | Well established and available | Data not regularly produced by countries |
| Tier 3 | Not established or under development/ testing | No data |
