Which additional step is required to enable MRP for consignment materials in SAP S/4HANA?

Enabling MRP for consignment materials in SAP S/4HANA requires setting a special procurement key or type for consignment in the material master record. This step is essential because it informs the system that the materials are procured on consignment, which affects how these materials are managed in the procurement process. The special procurement key indicates that the ownership of these materials will remain with the vendor until they are consumed or sold, thus altering the usual MRP calculations, stock valuation, and accounting treatments.

The other options do not directly support the specific requirement for MRP settings related to consignment materials. Creating a new vendor for each consignment material is unnecessary since you can use existing vendors for consignment arrangements. Defining a procurement approach in the gas-reporting module is unrelated to consignment materials in a general procurement context, and ensuring vendor evaluation is active does not specifically influence the MRP configuration for consignment materials. Therefore, selecting the appropriate special procurement key in the material master is the crucial step.