Operations and Maintenance (O&M) is a term used to describe the activities that are necessary to keep a facility, equipment, or system functioning properly. O&M activities are typically divided into two categories: preventive maintenance and corrective maintenance. Preventive maintenance is designed to prevent problems from occurring in the first place, while corrective maintenance is used to fix problems that have already occurred. O&M activities can include regular inspections, testing, repairs, replacements, and other tasks that are necessary to keep a facility, equipment, or system running efficiently. O&M activities are often performed by skilled technicians and engineers, but they can also be done by a facility’s staff. The goal of O&M is to ensure that a facility, equipment, or system is operating safely and efficiently, and that any problems are identified and addressed quickly. O&M is an important part of any facility’s overall maintenance plan, and it can help to extend the life of a facility, equipment, or system, as well as improve its overall performance.