MAPE vs WAPE vs sMAPE: Why MAPE Breaks on Small Actuals
This lesson is part of the course
In this lesson
You calculate MAPE, WAPE and sMAPE for one month of ten SKUs and see how two tiny SKUs push the MAPE to an absurd level while WAPE tells the real story.
Buy the course once for $9.99 to unlock every lesson and lab, the final exam and the certificate – lifetime access, no subscription.
Lessons in this course
- Forecast Errors: Error, Absolute Error & Squared Error Locked
- MAPE vs WAPE vs sMAPE: Why MAPE Breaks on Small Actuals Locked
- Forecast Bias, Bias % & the Tracking Signal (with a Warning Rule) Locked
- MAE & RMSE by SKU and by Product Family: Accuracy Depends on the Level Locked
- The Naive Benchmark & Forecast Value Added (FVA) Locked
- FVA Stairstep: Statistical Forecast vs Planner Override vs Consensus Locked
- Accuracy by Segment: ABC/XYZ Classes & Realistic Targets Locked
- Forecast Accuracy Dashboard: Accuracy %, FVA, Bias & a Trend Chart Locked