What can one do when forecast accuracy is good at an aggregate level, but deteriorates at a disaggregated level? Why is the S&OP process run by the Demand Planning group and not by the Supply Planning group? Our company uses bias as a measure of forecast performance instead of WMAPE. Is it wrong to do that? And many other questions to answer by Chaman L. Jain.

From Issue: Improving Operational and Financial Eficiencywith Product ID Rationalization — Cisco`s Experience
(Spring 2018)

Answers to Your Forecasting Questions