Traditional MRP systems suffer from several weaknesses, one of them being the disregard of uncertainties like those
referring to demand and supply quantities. Advanced MRP concepts handle these uncertainties by incorporating safety
stocks and scrap allowances into order release calculations. However, they fail to address how these measures of risk
protection might interact. Here, it is shown by using analyses from stochastic inventory control, how the performance of
MRP-generated control rules can be assessed and how appropriate control parameters for MRP can be determined.