Reference key for determining the movement type in the Warehouse Management System.
Each Inventory Management movement type that is relevant to the WM system is allocated to a reference movement type, with which the system determines the corresponding movement type in the WM system.
Using the reference movement type, you can group together Inventory Management movement types that result in the same movement in the WM system.
Inventory Management movement types that do not initiate any activity in the Warehouse Management System have the reference movement type 999.