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Set 314: Work Study Question Paper

Set 314: Work Study

Course:Bachelor Of Science In Engineering

Institution: Kenyatta University question papers

Exam Year:2008

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2008/2009
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE MANUFACTURING AND BACHELOR OF SCIENCE ENERGY
ENGINERING
SET 314: WORK STUDY
DATE: Wednesday 3rd December 2008 TIME: 11.00pm-1.00pm
INSTRUCTIONS
This paper consists of FIVE (5) Questions.
Attempt any THREE questions.
All questions carry equal marks.
1 a) Define the following
ii) Method study
ii) Work measurement
iii) Time study
iv) Work sampling
v) Process charts (5marks)
b) Describe four indications of a possible need for a method study.
(8marks)
An analyst has been asked to prepare an estimate of the proportion of time that a turret
lathe operation spends adjusting the machine with a 90% confidence level. Base on
previous experience the analysis believes the proportion will be approximately 30%. The
analyst uses a sample size of 400 observations.
i) What is the maximum possible error that will be associated the estimate.
2
ii) what sample size would the analyst need in order to have the maximum error be no more than +5%. (take z=1.65) (7marks)
2. a) Outline the users of work study. (5marks)
b) Describe the following
i) Micro motion study
ii) Me motion technique (4marks)
c) The following data shoed the activities to be carried in production of a batch of donor brackets in a manufacturing industry.
Activities
1) Order placed by the customer to sales.
2) Order is put in the in-try.
3) The order is transferred to the design department.
4) Specification of the bracket are verified.
5) Design of the bracket id developed.
6) Designs is verified by the design manager.
7) Design is transferred to the production.
8) Design is verified against available raw materials.
9) A batch of brackets are produced.
10) The batch is stored awaiting customer to collect them.
Draw a flow process chart for the job described above. (10marks)
3. a) Outline the steps to be under taken in work measurement for standardization by stop watch method. (10 marks)
b) Calparks Company has been in operation for five years. Since the establishment work has never been effectively done. There seems to be bottlenecks and an explained delay in production, the wages paid to the workers can not be justified. The company has invited a consultant to advise her on the way forward. As a consultant advise the company management highlighting the importance of measuring work and how it can be done. (10marks)
3
4. a) Outline five types of allowances that may be applied during work measurement. (5marks)
b) Outline the following work measurement techniques.
i) Synthesis from elemental data
ii) Predetermined motion time systems
iii) Analytical Estimating
iv) Activity Sampling. (10marks)
c) A metal working industry has been working over the last 5 years. The rate of work per cycle and standard has not been set. The management decides to use work sampling to derive time standard.
The following information was gathered working time and idle time 480min
Working time in percent 85%
Idle time in percent 15%
Performance Index 110%
Total allowances 15%
From the information given compute standard time.
5. a) State the advantages of work sampling over work-study.
b) An operator works for eight hours a day. A study shows that he was idle 15% of the day and worked the remaining time. His performance is 110%. Records show that he turned 420 pieces of acceptable quality during the day. Find the standard time per piece.
c) A furniture making factory contained a group of 13 machines. The management of the factory decided to find the percentage of time spent on the following activities.
i) Working
ii) Running
iii) Set-up
iv) Idle.
The observations were recorded between 9.00am and 12.00pm. The total observation of your activities were:
4
M/C
Working
M/C
Running
M/C being
Set up
M/C
Idle
288
475
83
530
20.0%
34.5%
6.1%
38.5%
Total observation percentage
Determine the limits between which it would be reasonable to assume the true values to lie.

Set 314: Work Study Question Paper

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