Master data is used in different components of SAP Supply Chain Management (SAP SCM).
Master data is stored in individual master records, which can be changed either individually or through Mass Maintenance.
Master data is created directly in the relevant component. However it can also be transferred from SAP R/3 via the APO Core Interface (CIF) for use in SAP Advanced Planning and Optimization (SAP APO). For more information on the integration of master data in SAP APO and SAP R/3, see Integration of Master Data.