Part 1
Course reading
A stock transport order (STO) moves material from one plant (the supplying plant) to another (the receiving plant) within the same company or between company codes. It is created like a purchase order (ME21N, document type UB for intra-company or NB for inter-company) but the vendor is a plant.
There are two common ways. One-step: goods issue and goods receipt are posted together (movement 301) — good for nearby plants. Two-step with delivery: the supplying plant creates a replenishment delivery (VL10B), picks and posts goods issue (movement 641 with delivery, or 351 without delivery). Stock is then shown as "stock in transit" at the receiving plant until goods receipt is posted (movement 101 against the STO).
Stock in transit belongs to the receiving plant's valuation but cannot be used until it arrives. Monitor it with MB5T; old items in transit usually mean a missing goods receipt or a lost shipment.
Example: Plant 1000 sends 500 kg of resin to Plant 2000. The delivery is picked and PGI posted with 641 — Plant 1000 stock falls by 500, stock in transit at 2000 rises by 500. The truck arrives with 495 kg; the receiver posts GR for 495 and raises a transit-loss claim for 5. KPIs: transit lead time, value of stock in transit older than 7 days, and receipt accuracy.