This document discusses different types of maintenance for equipment. It defines preventive maintenance as activities performed to prevent faults from occurring such as testing, measurement, adjustment and parts replacement. Corrective maintenance is defined as tasks to identify, isolate and rectify a fault to restore equipment to an operational condition. Planned maintenance refers to any scheduled maintenance while condition-based maintenance uses the actual condition of an asset to determine what maintenance is needed. The document also provides examples of systematic maintenance plans for both hardware and software.