Operations Management: Processes and Supply Chains (11th Edition)
Operations Management: Processes and Supply Chains (11th Edition)
11th Edition
ISBN: 9780133872132
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter 3, Problem 6P

(a)

Summary Introduction

Interpretation: a control chart for evaluating mean and range is to be drawn.

Concept Introduction:

A control chart is used to find out the defects in the constant sample size. Control chart is generally used when it become difficult to detect the actual number of defects.

(b)

Summary Introduction

Interpretation: the value of the sample size through 16 to 25 are to be plotted on the basis of solution emerged in part a and deciding whether the process is in control.

Concept Introduction:

A control chart is used to find out the defects in the constant sample size. Control chart is generally used when it become difficult to detect the actual number of defects.

(c)

Summary Introduction

Interpretation: If the process in part b, is not in control, whether it will be included in the mean as increase in the variability or both is to be determined.

Concept Introduction:

From the above calculations it has been concluded that the means of the process is not in control.

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