A maintenance management system is a tool used for managing and controlling work, materials, and equipment throughout the oil and gas production chain, from offshore platforms to refineries and pumping stations. Many maintenance management systems are becoming computerized, allowing for a central storage location for the majority of the asset information and data. Computerization of the maintenance system allows users to have access from multiple locations and, if properly set up and maintained, provides an effective tool to track activity over the life of the asset. Computerization of the maintenance system also enables linking of the company’s document management system, warehouse inventory system, and procurement and logistics systems, to name just a few. This linking capability empowers the computerized maintenance management system (CMMS) to reach its full potential.