Australian Water Information Dictionary
skill score
A statistical score used to assess the relative performance (skill) of a model against a reference forecast (e.g. climatology).
Skill Score =(Smod - Sref) / (Sperf - Sref)
Where
Smod = Score for the model forecast
Sref = Score for a reference forecast, e.g. climatology
Sperf = Score for a perfect forecast, usually 0 or 1
This definition applies to: