Operations / Demand Planning
Forecast Accuracy (MAPE / WMAPE / Bias) MAPE, WMAPE, WAPE
How close the demand forecast came to actual, as an error percentage, and whether it consistently leaned high or low.
The fork, why two teams get different numbers
The headline number depends entirely on which error statistic you pick.
In the Metric Library
- The full fork, both definitions worked all the way through
- The trap that makes the number lie, on a real export
- Every formula variant, spelled out
- The reconciliation anchor, what to tie it to and when to refuse
Reference: IBF / APICS demand-planning convention · Silver-Pyke-Peterson forecasting · tracking-signal control theory