Editing Forecasting (section)

===Other measures===
[[Forecast skill]] (SS): <math>\ SS = 1- \frac{MSE_{forecast}}{MSE_{ref}} </math>

Business forecasters and practitioners sometimes use different terminology. They refer to the PMAD as the MAPE, although they compute this as a volume weighted MAPE. For more information, see [[Calculating demand forecast accuracy]].

When comparing the accuracy of different forecasting methods on a specific data set, the measures of aggregate error are compared with each other and the method that yields the lowest error is preferred.