According to the Oracle Supply Chain Management Cloud: Plan to Produce training course2, sourcing rules and item attributes are two parameters that determine the release of planned orders in Demand Forecast to Supply Plan Process. Sourcing rules define how to replenish inventory or fulfill demand (A), and item attributes specify planning-related information such as make or buy, lead time, lot size, etc. ©. Demand schedule, sales orders, and external forecast are not parameters that determine the release of planned orders, but rather sources of demand that can be included in a supply plan.