الفهرس 
Introduction and literature ReviewOnly 14 pages are availabe for public view
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Abstract
The major concern of industrial companies is to gain maximum profit using
minimum cost, and one of the most important ways to achieve minimum cost is to
maintain the high efficiency of machines and reduce the number of failures and the
downtime. The objective of maintenance is to maintain existing equipment by
inspection, cleaning, lubrication, painting, plant protection, security pollution, and
noise control. There are many types of maintenance; reactive or corrective
maintenance and preventive maintenance. Reactive maintenance means the repair
work required after equipment failure has occurred. Preventive maintenance (PM) is
the maintenance of equipment or systems before fault occurs. Reactive maintenance
(unplanned maintenance) has many overhead costs that can be avoided during the
planning process. The cost of unplanned maintenance includes lost production, higher
costs for parts and shipping, as well as time lost responding to emergencies and
diagnosing faults while equipment is not working. When maintenance is planned, each
of these costs can be reduced. Equipment can be shutdown to coincide with production
downtime. Prior to the shutdown, any required parts, supplies, and personnel can be
gathered to minimize the time taken for a repair. These measures decrease the total
cost of maintenance.