The maintenance management is complex of daily processes and has a significant impact on the profitability of the business. Managing this process effectively without computer-based support in our computerizing life is almost impossible, but achieving successful implementation of these systems requires a major change-management program over many years. It is not surprising then that there is a high success if you can optimize your management cost and sell high quality service for clients with optimal price and your property quantity are growing up in a progress. There are not only control the budget but also play the role of decision makers when it comes to the protection of their property. Their responsibility is the same as ours—the protection of people, property, and facilities through the use of security forces, security systems, and security procedures. To incorporate in a computerized maintenance management system (CMMS)a scheduling support tool that given a set of preventive maintenance tasks and the availability of equipment and technicians, returns, solutions and full history what based on a algorithm that aims to minimize the total tardiness. Many CMMS implementations fail because the maintenance organization is not “ready” to be supported by a complex computer system.