With workflow enabled and a purchase order is created, the status is Draft. When it is submitted for approval, the status is ‘In Review’. When MRP runs, it does not consider these purchase orders (only Approved orders) and creates a new planned purchase order when demand exists. If the planned purchase order is firmed and the purchase order is also approved, twice the amount of goods required will be purchased. If MRP should take this into consideration it can be preventend. It should be nice if this can be set by a parameter.