The "Material Master" should contain a setting that specifies a tolerance for PO receipt. The intent is that if the total receipts for a PO line are within the delivery tolerance the po line is marked as closed. this would allow the Purchaser to create a PO for 700LBs with a 5% underdelivery tolerance and if the vendor only ships 697 LBS the PO would be closed out. Ideally there would be an over and under tolerance and the system should warn when the tolerance is being used to close out the PO.