Plant Maintenance (PM) in SAP is an integral part of the company and has numerous link to other areas. The Purpose of having Plant Maintenance will be shown as below;
Normally, SAP Plant Maintenance (PM) will be supported by other Application modules which is Materials Management (MM), Financial Accounting (FI) and Controlling (CO) that you can see in the figure below
In the SAP System, SAP user represents the systems to be maintained as technical objects. Technical objects are managed in the master data of the SAP System as functional locations, pieces of equipment and so on.
PM structure can be divided in EQM (Equipment Management), CRP (Capacity Resource Planning), WOC (Work Order Processing), PRM (Preventive Maintenance) and PMIS (PM Information System) which you can see in the figure below