Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Chapter 10, Problem 27P
Summary Introduction
To determine: The number of observations required.
Introduction: Thesample size is required to determine the number of observations that are necessary to find the true cycle time.
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Claudine Soosay recorded the following times assembling a watch:
Observation No.
1
2
3
4
5
6
7
8
Performance rating is given as 95%.
a) The average time of Claudine for the operation =
Time (minutes)
0.11
0.09
0.11
0.09
0.15
0.10
0.09
0.10
Observation No.
9
10
11
12
13
14
15
16
minutes (round your response to three decimal places).
Time (minutes)
0.11
0.09
0.11
0.10
0.11
0.12
0.14
0.10
Time left 1:06:0-
In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a
total of 5 samples are taken each having 4 observations regarding the thickness of fabric in measured in millimeters.
In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09
respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively.
What are the lower and upper control limits for the R chart?
O a. 0,28.17
O b. 0,31.17
OC None is correct
O d. 0,24.71
O e. 0,30.47
Of. 0,29.17
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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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