L OGISTICS 243 The material requirements can be planned at plant level or for different MRP areas. With MRP at the plant level, the system adds together stocks from all of the individual storage locations, with the exception of individual customer stocks, to determine total plant stock. In the case of material requirements planning on an MRP area level, only the stocks from the storage locations or subcontractor assigned to the respective MRP areas are taken into account. 455. What are the three `MRP Procedures'? Materials Requirements Planning (MRP) Master Production Scheduling (MPS) Consumption-based Planning 456. What is `MPS' (Master Production Scheduling)? Executed as that of an MRP, `MPS' is nothing but a special form of MRP, which aims to reduce storage costs and to increase planning stability. With MPS you can flag materials that greatly influence company profits or take up critical resources