Operations and Maintenance (O&M) is a term used to describe the activities necessary to keep a facility, system, or equipment running at peak performance. It includes all activities related to the operation, maintenance, repair, and replacement of the facility, system, or equipment. O&M activities are designed to ensure that the facility, system, or equipment is running efficiently and safely. O&M activities are often divided into two categories: preventive maintenance and corrective maintenance. Preventive maintenance is the proactive practice of inspecting, testing, and servicing equipment to prevent failure and ensure optimal performance. Corrective maintenance is the reactive practice of repairing or replacing components that have failed or are malfunctioning. O&M activities are essential for the proper functioning of any facility, system, or equipment, and can help to extend the life of the asset.