Page 78 - Facility Management (All Chapter)

TOTAL PRODUCTIVE MAINTENANCE

7.3 MAXIMIZING EQUIPMENT EFFECTIVENESS

Preventive Maintenance (PM) is action taken to keep an item which is in operating
condition by means of inspection, detection, and prevention of failures. When we look
into everyday practice, we see many examples of preventive maintenance. You don’t
undercoat your car unless you’re trying to prevent rust. You don’t wait until the oil light
comes on in your car before you change the oil.

Why have preventive maintenance ? Here is a place where Murphy’s law finds an
application. Equipment failure usually occurs at the worst possible time. For example,
the production department may be in the middle of a rush order that is very critical to
the customer. This is the time the equipment will break down and cause an interruption
in production. Depending on the severity of the failure, the equipment may be down
from a few hours to a few days. This delay can prove very costly in the competitive
markerplace that all industry finds itself in today. How much better it would have been
if the maintenance department had been able to detect a problem in the equipment,
arranged with the production department a convinient time, and made the necessary
repairs before a failure occured. This is the ideal situation, and can only be achieved
after the program has been in use for a period of time, and after proper training has
been given to those performing the inspection.

A second reason for preventive maintenance is safety. Proper inspections can detect
unsafe conditions in time to prevent an accident, which might cause damage to the
equipment or injure operating personnel.

A third reason is reduced repair costs. When a failure occurs, it usually destroys
equipment that is associated with the detective component. If the detective component
is changed before the failure occurs, the related equipment will not be damaged; thus,
repair costs will be reduced. With the price of replacement parts escalating at today’s
rate, this cost savings can be substantial

7.4 TYPES OF MAINTENANCE

Maintenance types can be broken down into four main classifications:

1. Breakdown
2. Corrective
3. Renovative
4. Preventive
5. Monitored.
6. Scheduled.

BPLK 78 DMQ 40392