To avoid unnecessary stock cost, you can assign a sales order to a project with appropriate hierarchy levels. This means that you can create a project structure that matches the multilevel production environment with bill of material and routing. You can assign a sales order item to a WBS element that represents the finished product and assign production orders to WBS elements that represent the semi-finished products. This way, you can use project stock to manage the materials required for the project and avoid creating inventory for intermediate products. Reference:https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/4dd8cb7b1c484b4b93af84d00f60fdb8/79ceb65334e6b54ce10000000a174cb4.html? &version=1909.002