SD-How to get delivery plant when you use va01 to create a new order

When you use the VA01 to create a new order,  the sap system will get the delivery plant by the following logic.

Step 1.Check whether the item is Higher-level item, the system will use Hierarchy item's plant;

Step 2. Check whether the plant field value(RV45A-DWERK) was input manually;

Step 3. Check  if a specification exists in a customer-material info record (KNMT-WERKS);

Step 4. Check if a specification exists in a specification exists in a retail (WRF3 table);

Step 5. Checks if a specification exists in a customer(Ship-to) master record(KNVV-VWERK);

Step 6. Checks if a specification exists in a material master record(Sale VIEW 1 MVKE-DWERK);