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