In SAP S/4HANA, how do you define the source of supply when the procurement type is set to In-house production?

When the procurement type is set to in-house production in SAP S/4HANA, the source of supply is defined through the production version. The production version specifies which materials can be produced in-house and outlines the processes involved in producing specific products. It links the finished product with the bill of materials (BOM) and routing, which are critical for guiding the production process.

The production version is important because it allows businesses to determine how to manufacture a product based on various factors, including the materials needed, the sequence of operations, and the work centers involved in production. This structure ensures that the production process is efficient and can meet demand effectively.

In contrast, other choices like the Purchasing Info Record and Contract relate to external procurement processes where materials are purchased from suppliers rather than produced in-house. The Selection Method, while a component of inventory management and procurement decision-making, does not directly signify in-house production. Therefore, the correct answer illustrates the importance of production versions in defining manufacturing processes for in-house procurement in SAP S/4HANA.