SAP Plant Maintenance or PM is a functional module providing three main functions: Inspection, Preventive maintenance, and Repair. In addition, it also covers all other measures that can be taken using the maintenance environment. Inspection and preventive maintenance are done to look at the actual working condition and the ideal condition of a technical system. Essentially the module has been designed to oversee all maintenance activities taking place within an organization.

Plant Maintenance integrates well with many other modules, such as Materials Management, Production, Controlling, and Sales and Distribution. This is made possible to keep the data consistent and up-to-date in all modules. In addition, processes needed to complete an action are automatically called from other modules when their input or output is needed for Plant Maintenance.

It is ensured through SAP PM that any technical system within an organization is working as it should. Equipment is seen as an independent object in a system that has to be maintained over its lifetime. Equipment can be created using the object-based environment of SAP and then maintained over time. All maintenance tasks performed on all equipment can also be tracked using this module. Moreover, the cost of maintenance tasks can be estimated and changes can be made accordingly.