This final section (2-A-3) of managing the forecast data with suppliers is the last section in forecasting and to me,one of the most interesting ones. Early Supplier Involvement (ESI) is again discussed in the context of data sharing. To have successful ESI and in turn, improved new product designs, forecast data and other relevant data needs to be shared with suppliers. For both legal and strategic reasons the best way to manage information with suppliers is to test if you would normally share such information with your market competitors.
Finally the section moves to collaborating with suppliers with Supplier Managed Inventory(SMI) and Collaborative Planning Forecasting and Replenishment(CPFR).The latter is common in retail contexts like Wal-Mart and Sara Lee while the former (SMI) can very well happen in manufacturing environments like auto etc.