Predictive maintenance is based on comprehensive measurements of mechanical condition. The ability of minimizing breakdown failure and giving direction to maintenance action and repair are the benefits of Predictivemaintenance. From the financial perspective Predictive maintenance is less costly compared with preventive maintenance and corrective/reactive maintenance. A major return in predictive maintenance result in maximizing production availability and minimizing the risks, cost and amount of production lost resulting from unexpected shutdown or failure.
Preventive maintenance also known as time base maintenance is type of maintenance that scheduled at specified time interval, it doesn’t matter whether the equipments are showing sign of defect or not . This kind of maintenance required inspection and sometimes replacement of some parts. Thus , preventivemaintenance typically result in unnecessarily replacing components in good condition. The worst part is when machine that in good condition disassembled for preventive maintenance and returned to service in poorer condition.
Reactive maintenance usually result in “fire fighting” where the problem causing failure are never corrected . Additionally outright may also lead to secondary failure. For example, misalignment problem could lead to bearing damaged which, in turn, causes costly damage to the bearing housing and shaft and possibly unscheduled shutdown.
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