"The RPD is defined as the ratio of the standard deviation of the response variable to the RMSEP or
RMSECV (some authors use the term SDR). An RPD between 1.5 and 2 means that the model can discriminate low from high values of the response variable; a value between 2 and 2.5 indicates that coarse quantitative predictions are possible, and a value between 2.5 and 3 or above corresponds to good and
excellent prediction accuracy, respectively."
(Postharvest Biology and Technology 46 (2007) 99–118
Review
Nondestructive measurement of fruit and vegetable quality
by means of NIR spectroscopy: A review
Bart M. Nicola¨ı, Katrien Beullens, Els Bobelyn, Ann Peirs,
Wouter Saeys, Karen I. Theron, Jeroen Lammertyn)
