Maintenance is the process of keeping a system, machine, or building in a state of good repair. It involves inspecting, repairing, and replacing parts and components to ensure that the system is functioning properly and safely. Maintenance is a critical part of any organization, as it ensures that the system is running efficiently and that any potential problems are identified and addressed quickly. It is also important for the safety of personnel and customers, as well as the overall performance of the system. Maintenance can be divided into two main categories: preventive maintenance and corrective maintenance. Preventive maintenance involves regularly scheduled inspections and maintenance tasks to ensure that the system is functioning properly and to identify any potential problems before they become serious. Corrective maintenance is performed when a problem is identified and requires immediate attention. This type of maintenance typically involves repairing or replacing parts and components to restore the system to its original condition.