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The actions taken to preserve the operation of devices, particularly of electromechanical equipment, to ensure that the devices can perform their intended functions when needed. The field ofmaintenance science is an interdisciplinary research area that employs techniques from physics, engineering, and decision analysis. Traditionally, the focus of maintenance has been on equipmentavailability—the ratio of operating time less downtime to total available time. Modern maintenance practices focus on increasing equipment effectiveness, that is, making sure that the equipment is both available andcapable of producing superior-quality products. See Systems engineering

It has been estimated that up to 50% of all life-cycle equipment costs are attributable to operation and maintenance.Equipment buyers are now requiring better information on time to failure and repair. Suppliers have responded by including such things as failure mode and effects analysis, statistical information on failuretimes, cost-effective maintenance procedures, and better customer training with their products. Additionally, many companies emphasize design enhancements to improve maintainability, such as built-indiagnostics, greater standardization and modularity, and improved

El mantenimiento se define como un conjunto de normas y técnicas establecidas para la conservación de la maquinaria einstalaciones de una planta industrial, para que proporcione mejor rendimiento en el mayor tiempo posible.
El mantenimiento ha sufrido transformaciones con el desarrollo tecnológico; a los inicios era vistocomo actividades correctivas para solucionar fallas. Las actividades de mantenimiento eran realizadas por los operarios de las maquinas; con el desarrollo de las máquinas se organiza los departamentosde mantenimiento no solo con el fin de solucionar fallas sino de prevenirlas, actuar antes que se produzca la falla en esta etapa se tiene ya personal dedicado a estudiar en que período se produce...