MAPE
Mean Absolute Percent Error
[Mean Absolute Percent Error]
Where
For Best Fit
N is the number of time slices analyzed in the Holdout Window
In case of negative demand, MAPE can be greater then 2
For Demand
N is the error calculation window, which is the # of Slices for Forecast Error Calculation forecast parameter (as specified on the Edit Forecast Parameter page - Forecasting tab).
Appears on these pages
Interactive Planner Worksheet — Forecast Tab