Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Question
Chapter 10, Problem 30P
a)
Summary Introduction
To determine: The standard time for the operation.
Introduction: Time study is the basis that helps set the standard time; it would time a sample of the performance of the worker.
b)
Summary Introduction
To determine: The number of
Introduction: Thesample size is required to determine the number of observations that are necessary to find the true cycle time.
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Installing mufflers at the O'Sullivan Garage in Golden, Colorado, involves five work elements. Jill O'Sull ivanhas timed workers performing these tasks seven times, with the results shown in the following table: By agreement with her workers, Jill allows a 10% fatigue factor and a 10% personal-time factor, but no time for delay. To compute standard time for the work operatio n, Jill excludes all observations that a ppear to be unusual or nonrecurring. She does not want an error of mo re than ±5%.a) What is the standard time for the task?b) How many observations are needed to assu re a 95% confidence level?
Installing mufflers at the Stanley Garage in Golden, Colorado, involves five work elements. Linda Stanley has timed workers performing these tasks seven times, with the results shown in the following table.
Job elements
OBSERVATIONS (MINUTES)
Performance rating (%)
1
2
3
4
5
6
7
1
Select correct mufflers
4
5
4
6
4
15
4
100
2
Remove muffler
6
8
7
6
7
6
7
90
3
Weld/install new muffler
15
14
14
12
15
16
13
105
4
Check/inspect work
3
4
24
5
4
3
18
100
5
Complete paperwork
5
6
8
-
7
6
7
130
By agreement with her workers, Stanley allows a 10% fatigue factor and a 10% personal-time factor. To compute standard time for the work operation, Stanley excludes all observations that appear to be unusual or nonrecurring. She does not want an error of more than 5%.
What is the standard time for the task?
How many observations are needed to assure a 95.45%…
The owner of Kat Motel wants to develop a time standard for the task of cleaning a cat cage. In
a preliminary study, she observed one of her workers perform this task six times, with the
following results:
Observation
1
2
3
4
5
6
Time (seconds) 52.7
70
53.3
90.3
80.6
86.7
If the employee performance rating is 1.50, what is the standard time for this task with an
allowance of 20 percent of job time is used?
seconds.
Chapter 10 Solutions
Operations Management
Ch. 10 - Prob. 1DQCh. 10 - Prob. 2DQCh. 10 - Prob. 3DQCh. 10 - Prob. 4DQCh. 10 - Prob. 5DQCh. 10 - Prob. 6DQCh. 10 - Prob. 7DQCh. 10 - Prob. 8DQCh. 10 - Prob. 9DQCh. 10 - Prob. 10DQ
Ch. 10 - Prob. 11DQCh. 10 - Prob. 12DQCh. 10 - Prob. 13DQCh. 10 - Prob. 14DQCh. 10 - Prob. 1PCh. 10 - Draw an activity chart for a machine operator with...Ch. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 30PCh. 10 - Prob. 31PCh. 10 - Prob. 32PCh. 10 - Prob. 33PCh. 10 - Prob. 34PCh. 10 - Prob. 35PCh. 10 - Prob. 36PCh. 10 - Prob. 37PCh. 10 - Prob. 38PCh. 10 - Prob. 1CSCh. 10 - Prob. 2CSCh. 10 - Prob. 3CSCh. 10 - Prob. 4CSCh. 10 - Prob. 1VCCh. 10 - Prob. 2VCCh. 10 - Prob. 3VCCh. 10 - Prob. 4VC
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