Companies with the best intentions are still having problems generating accurate demand forecasts. It continues to be one of the most sought after objectives for improving supply chain management. As a result, companies have ignored demand forecasting as they have chosen to improve upstream efficiencies related to supply-driven planning activities. It has become clear that demand forecasting affects almost every aspect of the supply chain. Now that many companies have solved the upstream planning inefficiencies there is a renewed focus on improving the accuracy of their demand response. This chapter provides a structured framework to transition from being supply-driven and becoming demand-driven with an emphasis on customer excellence, rather than operation excellence.