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ASSIGNMENT
DRIVE
|
SPRING 2014
|
SUBJECT CODE & NAME
|
|
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 :
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
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 :
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
Send
your semester & Specialization name to our mail id :
“
help.mbaassignments@gmail.com ”
or
Call
us at : 08263069601
(Prefer
mailing. Call in emergency )
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