Note
See the following video to learn more about the goods receipt and goods issue processes in Logistics Execution in SAP S/4HANA:Note
SAP Extended Warehouse Management (EWM) functions are also available in the core SAP S/4HANA system (as SAP S/4HANA Embedded EWM). While legacy Warehouse Management (WM) functions remain available, future development will take place only for SAP EWM, which will eventually replace legacy WM entirely. A lean version of legacy WM is also available under the name of Stock Room Management.
When working with deliveries, warehouse management activities, such as creating and confirming a warehouse order, are completed before a change is made to the stock level in inventory management. A goods receipt or goods issue posting always relates to a delivery.
Note
The warehouse order is the document used to execute all material movements in the warehouse.Delivery Documents in Shipping Activities

If you use additional processes for buying and selling, you may also need to perform shipping activities such as picking, packing, and printing of documentation. You can also use delivery documents to manage these processes. The different business processes are modeled using different types of delivery document.
For example, if you want to transfer stock from one plant to another, the ordering plant creates a purchase order on the supplying plant. The supplying plant then creates a delivery document with reference to this purchase order. The delivery forms the basis for picking, issuing output, and posting goods issue.