Rating | NSE | PBIAS value |
Very good | 0.75 < NSE ≤ 1.00 | PBIAS < ±10 |
Good | 0.65 < NSE ≤ 0.75 | ±10 ≤ PBIAS < ±15 |
Satisfactory | 0.50 < NSE ≤ 0.65 | ±15 ≤ PBIAS < ±25 |
Unsatisfactory | NSE ≤ 0.50 | PBIAS ≥ ±25 |