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Plant maintenance
1. PLANT Maintenance
Prepared By
Mrs. C.Revathi BE, MBA
Assistant Professor
Department Of Management Studies
V.V.V. College For Women
Virudhunagar
2. Introduction:
Plant maintenance is an important service function
of an efficient production system.
It helps in maintaining and increasing the operational
efficiency of plant facilities.
Maintenance is the procedure of finding the faults in
any equipment/Machine and also removal of fault.
It may be before the breakdown or after the breakdown.
3. Maintenance Objectives:
To increase functional reliab ility of production
facilities.
To maximize the useful life of the equipment.
To maximize production capacity from the given
equipment.
To minimize the total production cost.
To minimize the frequency of interruption in
production by reducing breakdowns.
To enhance the safety of the manpower.
7. Planned Maintenance-
In planned maintenance the maintenance action
is carried out with some fore thoughts, prior
planning , record keeping and control action.
These can be further classified as :-
Preventive maintenance
Breakdown maintenance
Predictive maintenance
8. It is based upon the principle that ‘prevention is better than
cure’.
It is a set of activities that are performed on plant equipment,
machinery, and systems before the occurrence of a failure in
order to protect them and to prevent or eliminate any
degradation in their operating conditions.
Or the maintenance carried out at predetermined intervals
or according to prescribed criteria and intended to reduce
the probability of failure or the degradation of the
functioning and the effects limited.
10. Running maintenance:
Running maintenance which includes those
maintenance activities that are carried out while the
machine or equipment is running.
Example – lubrication, adjustment of nuts and screws,
tightening of loose nut and bolts.
11. Shut Down Maintenance:
Which is a set of preventive maintenance activities
that are carried out when the production line is in
total stoppage situation.
These are performed generally after three or six
months.
These involves the inspection of plant items which
are known or suspected to occur.
12. Planned or Scheduled Maintenance:
Scheduled Maintenance is any variety of scheduled
maintenance to an object or item of equipment.
Specifically, Planned Maintenance is a scheduled
service visit carried out by a competent and suitable
agent, to ensure that an item of equipment is operating
correctly and to therefore avoid any unscheduled
breakdown and downtime.
Good example of PM program is car maintenance. After
so many kilometers or miles oil should be changed,
parts renewed.
13. Breakdown Maintenance:
It is an emergency based policy in which the plant or
equipment is operated until it fails and then it is
brought back into running condition by repair.
The maintenance staff locate any mechanical, electrical
or any other fault to correct it immediately.
It is feasible for the small factories where
1. There are few types of equipment.
2. Machine and equipments are simple and does not require
any specialist.
3. Where sudden failure does not cause any serious financial
loss.
14. Predictive maintenance:
As the names implies it involves the prediction of the
failure before it occurs, identifying the root cause for
those failures symptoms and eliminating those causes
before they result in extensive damage of the
equipment.
Type of maintenance performed continuously or at
intervals according to the requirements to diagnose
and monitor a condition or system. Also called
condition based maintenance.
