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ASSIGNMENT
DRIVE SPRING 2014
SUBJECT CODE & NAME OM 0015 - Maintenance Management
SEMESTER 4
BK ID
CREDITS 4
MARKS 60
Note: Answer all questions. Kindly note that answers for 10 marks questions should be
approximately of 400 words. Each question is followed by evaluation scheme.
Q.1 Write short notes on:
a. Quality versus maintenance
b. Mean Time to Repair (MTTR)
c. Fault tree analysis
d. Systematic equipment replacement program
Ans : a. Quality versus maintenance :
Good quality maintenance contributes significantly to quality assurance. Poor maintenance of
machines may lead to erratic working of certain parts leading to costly failures. Erratic working, say
for example, an aggregate of the machine running with heavy vibrations has the direct effect of
premature wear, breakage of cutting tool, etc. The product produced from such a machine will have
bad surface finish, resulting in rejections.
b. Mean Time to Repair (MTTR) :
Mean Time To Repair (MTTR) is a basic measure of the maintainability of repairable items. It
represents the average time required to repair a failed component or device. Expressed
mathematically, it is the total corrective maintenance time divided by the total number of corrective
maintenance actions during a given
c. Fault tree analysis :

2. Fault tree analysis (FTA) is a top down, deductive failure analysis in which an undesired state of a
system is analyzed using Boolean logic to combine a series of lower-level events. This analysis
method is mainly used in the fields of safety engineering and reliability engineering to understand
how systems can fail, to identify the best ways to reduce risk or to determine (or get a feeling for)
event rates of a safety accident or a
d. Systematic equipment replacement program :
The primary goal of maintenance is to avoid or mitigate the consequences of failure of equipment.
This may be by preventing the failure before it actually occurs which Planned Maintenance and
Condition Based Maintenance help
Q.2 Evaluate the relationships between degree of maintenance and various costs from the graph
given below:
Ans: Degree of maintenance and economic cost :
The economic cost of a decision depends on both the cost of the alternative chosen and the benefit
that the best alternative would have provided if chosen. Economic cost differs from accounting cost
because it includes opportunity cost. As an example, consider the economic cost of attending
college. The accounting cost of attending college includes tuition, room and board, books, food, and
other incidental expenditures while there. The opportunity cost of college also includes the salary or
wage that otherwise could be earned
Q. 3 Explain Condition Based Maintenance(CBM) .
Ans : Explanation :
Condition-based maintenance (CBM), shortly described, is maintenance when need arises. This
maintenance is performed after one or more indicators show that equipment is going to fail or that
equipment performance is deteriorating. This concept is applicable to mission critical systems that
incorporate active redundancy and fault reporting. It is also applicable to non-mission critical
systems that lack redundancy and fault

3. Q.4 Write short notes on:
 Costs associated with inventory control of spare parts
 Problems in maintenance scheduling
 Universal maintenance standards
 Asset life cycle management
Ans : Costs associated with inventory control of spare parts :
Inventory control of spare parts is essential to many organizations, since excess inventory leads to
high holding costs and stock outs can have a great impact on operations performance. This paper
compares different re-order point
Problems in maintenance scheduling :
The problem of scheduling o-line preventive maintenance of power generating units is of substantial
interest to the electric power industry. A typical power plant consists of one or two dozen power
generating units which can be individually scheduled for preventive maintenance. Both the required
duration of each unit's maintenance and a
Universal maintenance standards :
Comparative Estimating is a work measurement technique which can be used for setting time
standards on low repetitive tasks, such as may be met with in the maintenance area. It has been in
wide use since 1955 and has probably been more commonly known as Universal Maintenance
Standards (UMS). Since its introduction, the
Asset life cycle management :
Improve equipment reliability and plant utilization with new tools that offer real-time collaboration
and adaptive procedures. Transform your organization from fragmented and reactive to demand-
driven and predictive.
Q.5 Explain the steps to autonomous maintenance.
Ans : Listing the steps to autonomous maintenance :
Step 1 : Conduct initial cleaning and inspection
Step 2 : Eliminate sources of contamination and inaccessible areas.
Step 3:Develop and test
Q. 6 Explain pillar 1 (autonomous maintenance -JH) of TPM implementation.
Ans : Explanation of the term autonomous maintenance :

4. The principal way in which the production department participates in TPM is through
autonomous maintenance- cleaning, inspection, and simple adjustments performed by operators
systematically trained through a step-by-
Dear students get fully solved assignments
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Call us at : 08263069601
(Prefer mailing. Call in emergency )