MRP is carried out using current and future sales figures. The planned and the exact requirement quantities trigger the net requirements calculation. The requirement elements of this calculation include sales orders, planned independent requirements, material reservations, dependent requirements received from BOM explosion, and so on. The net requirements calculation can give the exact requirements for each day.

As you require exact requirement quantities for MRP, this means that you can work with particularly low safety stocks.

The forecast can be used in MRP to calculate the total requirement quantity or the unplanned requirement quantity.