1. SAP Help Portal for SAP S/4HANA
"Subcontracting": "In subcontracting
you order a product from a subcontractor. You provide the subcontractor with the components required to manufacture the product. In the SAP system
the subcontracting process is handled by means of a subcontract order." This source directly validates that informing the subcontractor about the product and components is the core activity. (Accessed under SAP S/4HANA -> Sourcing and Procurement -> Operational Procurement -> Subcontracting).
2. SAP Learning Hub
Course S4500 - Business Processes in SAP S/4HANA Sourcing and Procurement
Unit: "Subcontracting": The course material explains that a subcontracting purchase order is created with item category 'L'. The system then explodes the Bill of Material (BOM) for the ordered material to determine the components to be provided to the vendor
which are then listed in the purchase order. This confirms the mechanism for informing the subcontractor.
3. SAP Press
"Materials Management with SAP S/4HANA: Business Processes and Configuration" (2022)
Chapter 7
Section 7.4 "Subcontracting": This chapter details the process flow
stating
"The process begins with the creation of a subcontracting purchase order... The components that need to be provided to the subcontractor are entered in the PO." This explicitly supports the function described in the correct answer.