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Work Study Question Paper

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.

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)

2
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:

3
M/C
M/C
M/C being
M/C
Working Running Set up
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

Work Study Question Paper

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