Master data in SAP PM (Plant Maintenance) refers to the foundational information that is essential for the effective functioning of the maintenance processes within an organization. It encompasses static data elements that remain relatively constant over time and are used as reference data for various maintenance activities. Master data in SAP PM typically includes information such as equipment details, functional locations, maintenance strategies, task lists, material master records, and work center details.

A good definition of master data in SAP PM would emphasize its critical role as the backbone of maintenance operations, providing the necessary context and structure for planning, executing, and monitoring maintenance tasks. This data serves as a central repository of information that enables accurate decision-making, efficient resource allocation, and effective maintenance management. A well-defined set of master data ensures consistency, reliability, and integrity across maintenance processes, thereby supporting the organization in achieving its maintenance objectives and optimizing asset performance..