Direct materials are usually assigned Plant IDs in SAP S/4HANA, or another backend system. The SAP Ariba realm can be configured to display plant information (or contract manufacturers) in the Contract MFR column of BOM and Material lists. Please keep in mind that the Contract MFR field can be renamed to Plant if needed.
To show the values you must map each product sourcing plant ID (PLANT_ID) to an SAP plant ID (PLANT_SAP_ID). When a material is displayed in the SAP Ariba product sourcing user interface, SAP Ariba uses the material's SAP plant ID to find the corresponding product sourcing plant ID and displays the name for the product sourcing plant ID. For example, when SAP Ariba sends purchasing info record (PIR) data to SAP, SAP Ariba uses the product sourcing plant ID to find the corresponding SAP plant ID and sends the SAP plant ID in the data.
Plant IDs can be imported into the realm manually through the Product Sourcing Manager, or more commonly, integrated automatically from SAP ERP or SAP S/4HANA during the Material Master Load.
This behavior is controlled by the site parameter in your account. If the DEPLOYMENT_MODE.SOURCE_OF_PLANT_ASSIGNMENT parameter is set to Material Master, manual plant data uploads are not allowed, and plant information must be provided through the master data integration.
If the plant assignment is done through manual import, administrators can import the file in SAP Ariba Administrator→Product Sourcing Manager→Import Data→Plant.
Note
Plant ID values defined at the parent level are inherited by child materials unless a Plant ID is explicitly defined at the child material level.