Operations Management: Processes And Supply Chains (12th Global Edition) - Does Not Include Mylab Operations Management
12th Edition
ISBN: 9780134890357
Author: Lee J. Krajewski, Manoj K. Malhotra
Publisher: Pearson Global Edition
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Question
Chapter 3, Problem 13P
(a)
Summary Introduction
Interpretation:
To design a p-chart showing upper and lower control limits.
Concept Introduction:
P-charts are used to identify the defective items, from a group of items. It is a form of control chart which is used to analyze the proportion of nonconforming units into a specified sample.
(b)
Summary Introduction
Interpretation:
Tax information process in statistical control.
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The IRS is concerned with improving the accuracy of tax information given by its representatives over the telephone. Previous studies involved asking a set of 25 questions of a large number of IRS telephone representatives to determine the proportion of correct responses. Historically, the averageproportion of correct responses has been 72 percent. Recently, IRS representatives have been receiving more training. On April 26, the set of 25 tax questions were again asked of 20 randomly selected IRS telephone representatives. The numbers of correct answers were 18, 16, 19, 21, 20, 16,21, 16, 17, 10, 25, 18, 25, 16, 20, 15, 23, 19, 21, and 19. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z = 3. b. Is the tax information process in statistical control?
A team of undergraduate business students was asked to recommend improvement to the data entry process at the county appraiser’s office. The team identified several types of errors, such as posting an incorrect name or entering an incorrect parcel number. The deed abstractors were asked to keep a record of the errors in data entry that were sent to them. The following table is a frequency distribution of errors:
Defect
Total
Posting error in name
Posting error in parcel
Property sold after tax bills were mailed
Inappropriate call transfer (not part of deeds>mapping)
Posting error in legal description>incompletelegal description
Deeds received after tax bills printed
Correspondence errors
Miscellaneous errors
23
21
5
18
4
6
2
1
a. Construct a Pareto diagram of these defects in data entry.b. What recommendations would you suggest to the county appraiser?
I used excel and got a 1.31 on this question, but my friend got another answer.
Chapter 3 Solutions
Operations Management: Processes And Supply Chains (12th Global Edition) - Does Not Include Mylab Operations Management
Ch. 3 - Should a very pricey handcrafted object of beauty...Ch. 3 - Prob. 2DQCh. 3 - Prob. 3DQCh. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7P
Ch. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 31PCh. 3 - Prob. 1AMECh. 3 - Prob. 2AMECh. 3 - Prob. 3AMECh. 3 - Prob. 4AMECh. 3 - Prob. 5AMECh. 3 - Prob. 1VCCh. 3 - Prob. 2VC
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