| Verbal scale | Not relevant | Little relevance | Relevant | Very relevant | Extremely relevant |
| Numeric scale | 1 | 2 | 3 | 4 | 5 |
| Weighing | 0.0 | 0.25 | 0.50 | 0.75 | 1.0 |
| Criteria for indicators validation | Reject | Supplementary indicator | Principal indicator | ||
| ≤0.60 | >0.60 and <0.80 | ≥0.80 | |||