Forecast skill
In the fields of forecasting and prediction , forecast skill or prediction skill is any measure of the accuracy and/or degree of association of prediction to an observation or estimate of the actual value of what is being predicted ( formally , the predictand ) ; it may be quantified as a skill score . 
<triplet> forecasting <subj> prediction <obj> subclass of <triplet> prediction <subj> forecasting <obj> partially coincident with