Plan
It is carried out for items on the bill of materials and may be aggregated by supplier or commodity type. This planning process type is most closely associated with the leading practices in material requirements planning.
PLAN make (P3) is the process of comparing actual production orders plus replenishment orders coming from P4 against the P1 constrained forecast generated above and then generating a master production schedule resource plan to satisfy service, cost, and inventory goals. The translates to material requirements, P2, that tell the purchasing (or commodity) manager how much product is required by item and a master production schedule that lets the plant scheduler know how much total product must be made by ship date. It is carried out for each plant location and may be aggregated to region or another geography type. This planning process type is most closely associated with the leading practices of master production scheduling.
PLAN deliver (P4) is the process of comparing actual commited orders with the P1 constrained forecast generated above and developing a distribution resource plan to satisfy service, cost, and inventory goals.