What is the difference between a transfer order and a transfer requirement in SAP WM?

In SAP Warehouse Management (WM), a transfer order is a document that is created to move materials from one storage location to another within a warehouse. It specifies the details of the material to be transferred, the source and destination storage bins, and other relevant information. Transfer orders are used to initiate the physical movement of materials and are typically created based on inventory management requirements.

On the other hand, a transfer requirement is a request that triggers the creation of a transfer order. It is generated based on various factors such as stock shortages, replenishment needs, or order picking requirements. Transfer requirements serve as a basis for creating transfer orders and ensure that the right materials are moved at the right time to meet operational needs.

Overall, transfer orders are the actual documents that authorize the physical movement of materials, while transfer requirements are the triggers that initiate the creation of transfer orders in SAP WM.