In release 4.0, there is a new calculation variant for the
lot-sizing procedure, Replenish to maximum stock
level , with Reorder point planning with
external requirements. In this variant, the external
requirements are added to the order quantity. In this new
calculation the system orders a quantity that brings the stock
level up to the maximum stock level and also covers all
The new calculation variant also applies to MRP.
If you want to use this new variant, you have to access Customizing for MRP to check the lot-sizing procedure, choose Lot-sizing procedure HB and then in field Maximum stock level variant choose indicator 1.