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Modern maintenance management is not
to repair broken equipment rapidly.
Modern maintenance management is to
keep the equipment running at high
capacity and produce quality products at
lowest cost possible.
Meaning of Maintenance &
Maintenance is defined as “any action that restores
failed units to an operational condition or retains non-
failed units in an operational state”.
Maintenance Management is concerned with the
direction and organization of resources in order to
control the availability and performance of industrial
plant to some specific level.
Objective of Maintenance
Minimizing the loss of productive time because of
Minimizing the repair time and repair cost.
To keep all productive assets in good working
Efficient uses of maintenance personnel and
To improve the quality of the products and to improve
To maximize efficiency and economic in production
through optimum use of facilities.
Importance of Maintenance
Dependability of services
Help in not Loosing Market Share
Cost Context Induction
Organizations depend upon Equipment
Types Of Maintenance
There are 4 models are available-
1. Breakdown/Corrective Maintenance
2. Preventive Maintenance
3. Predictive Maintenance/Condition
Types Of Maintenance
Periodic inspection is carried out to anticipate
breakdowns and to prevent them before they occur,
instead of allowing the breakdown to happen and then
to take action.
It occurs, when there is a work stoppage because of
machine breakdown. In this sense maintenance become
Repair are made after the equipment is out of order.
Types of Maintenance
Level of Maintenance Activity
Total Productivity Maintenance
TPM is a way of organizing maintenance to support
productivity & quality through increased equipment
efficiency and to reduce costs.
TPM concept means that all employees work in small
groups to maximize the improvement of equipment
Operators are working independently with all
maintenance activities of their own equipment and
have also the total responsibility of operation and
Objective of TPM
Avoid wastage in a quickly changing economical
Producing goods without reducing product quality
Produce a low batch quantity at a earliest possible
Goods send to the customers must be non-defective.
Need For Replacement
There are two basic reason for replacement of machine:
First and foremost is safety.
Another legitimate reason for replacing equipment is
that it is no longer cost effective to maintain.
The machine are to be periodically replaced.
The replacement study can be classified into two
• Deterministic types of items that deteriorate with
time[Replacement due to gradual failure]
• Simple probabilistic model for items which fail
completely[Replacement due to sudden failure]
Simple Probability Model
Electronic items like transistors, resistors, tube lights
bulbs, etc. will fail all of sudden.
Failure of these causes complete breakdown of the
Few policies are considered for these kind of
I. Individual Replacement Policy
II. Group Replacement Policy
Individual Replacement Policy
If a particular light is beyond repairs, then it is replaced.
This kind of policy of replacement is called as
‘replacement of items as-and-when they fail’ or
Group Replacement Policy
There are certain items which do not deteriorate but fail
completely after certain amount of use. These kinds of
failures are analyzed by the method called as group
replacement theory. Here, large numbers of items are
failing at their average life expectancy.
The ability of an item, under stated
Conditions of use, to perform a required
Function under stated conditions for a
stated period of time.
A CMMS software package maintains a computer
database of information about an organization’s
maintenance operations, i.e. CMMIS – computerized
maintenance management information system.
This information is intended to help maintenance
workers do their jobs more effectively (for example,
determining which machines require maintenance
and which storerooms contain the spare parts they
To help management make informed decisions (for
example, calculating the cost of machine breakdown
repair versus preventive maintenance for each
machine, possibly leading to better allocation of
CMMS data may also be used to verify regulatory