1) Create a customer master in XD01 for the supplying plant, assign a customer number to the receiving plant in OLME. Set up an STO between the plants.
2) In the STO, assign document type UB, delivery type NL, and checking rule RP or ZS for the supplying plant. Assign document type UB for both plants.
3) Create the STO, then generate a purchase requisition and purchase order with document type UB and the supplying plant. Send the PO to the supplying plant. Create an outbound delivery to trigger a goods issue and material document. Receive the goods at the receiving plant. Post delivery costs separately.