Explanation
A subcontracting procurement process involves sending components to a vendor who provides a service and returns an assembled or processed product. Some features of this process are:
You can maintain the components to be provided in a bill of material (BOM), which specifies the quantity and type of components required for each finished product.
You can have subcontracting purchase requisitions created by MRP (material requirements planning), which calculates the demand for finished products and components based on various planning parameters.
You can customize the control parameters for the subcontracting item category (L), which determines whether a goods receipt or an invoice receipt is required, whether account assignment is possible, and whether a material number is mandatory. References: SAP S/4HANA Sourcing and Procurement | SAP Learning, Course S4520, Unit 4, Lesson 1.