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ME2027 - Process Planning and Cost EstimationINTERNAL I ANSWER
KEY
Date : 25.08.14
Part - A
1.
Define Work studyIt is a generic term for those techniques,
particularly method study and work measurement,
which are used in the examination of human work in all its
contexts, and which leadssystematically to the investigation of all
the factors which affect the efficiency and economy of
the situation being reviewed, in order to affect
improvements.
2. What are the objectives of Method study?
To find the most economical way of doing the work.
To standardize the methods, materials, tools and equipment.
3.
Brief the purpose of Work Measurement.
To determine the time required to do a job.
To estimate the man and machine requirements and to assess the
plant capacity accurately.
4.
What are the general rules to be followed in breaking down a
task into elements?
Each element should be easily identifiable
Each element should be as short in duration as possible and can
be timed accurately and
reliably
5. What is SIMO Chart?
SIMO chart is used to record, simultaneously on a common time
scale, the activities of two
hands or other parts of workers body during the performance of a
single cycle of
operation being investigated.
6.
Name any four important techniques used in method study.
Operation process chart (or) Outline process chart.
Flow process chart.
7.
What is meant by Ergonomics?
Ergonomics is a scientific study that deals with the
interactions between the human
beings, the tools and the equipment (machinery) and the working
environment.
8.
Define Process Planning and Write the approaches to process
planning.Process planning can be defined as the systematic
determination of the methods by which
a product is to be manufactured economically and
competitively
9.
What are the benefits of CAPP?
Improved productivity
Lower production cost
10.What are the machine selection parameters?
Functional requirements
Reliability
Service life durability
Part B
11.
(a) Method StudyMethod study is that part of work study which
deals with systematic analysis and improvement of work
methods and systems through the application of innovative
techniques to achieve better utilization of
resources.
11. (b) Time study Select the job to be studied.
(ii) Note all the details about the operations and the operator
being studied.
(iii) Split the work cycle into suitable elements. An element is
a distinct partof a job, selected
for convenience of observation, measurement and analysis. Any
non-repetitive andoccasional element in the manufacturing cycle
should be noted separately.
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(iv) Determine the number of cycles required to be timed to get
desired accuracy.
(v) Observe and record the actual time taken by the operator for
each element of the job.
(vi) Simultaneously rate or judge the pace of the operators
performance.
(vii) Different time readings for each element are recorded on
the record sheet.
(viii) Average time for each element is calculated after
eliminating the abnormal values. (This is
also called observed time.)
(ix) The observed time for every element multiplied by the
corresponding rating factor(expressed in %) gives normal time or
basic time.
Normal Time = Observed Time Rating Factor (%)12. (a) Operation
Charts
12. (b) Approaches to Process planning
13.(a) (i)Process planning The finished product is analyzed
Prepare a Bill Of Materials
Decide which parts are to be manufactured
Choose the appropriate blank size
(ii) Total Normal Time = 2.163 min
Standard Time = 2.401 min
13. (b)(i)Applications : * Design of instruments and
controls
* Design of workplace * Design of working environment
13 (b) (ii) Total Normal time = 8.389 min
Standard Time = 9.56 min
