MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
MyLab Operations Management with Pearson eText -- Access Card -- for Operations Management: Processes and Supply Chains
12th Edition
ISBN: 9780134742366
Author: Lee J. Krajewski, Manoj K. Malhotra, Larry P. Ritzman
Publisher: PEARSON
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Chapter 3, Problem 7P

a)

Summary Introduction

Interpretation: calculation of control charts

Concept introduction: Thechart of control is a graph utilized to analysis how a procedure changes over time. Data are mapped in time request. Each time incontrol chart, for the upper control limit there is upper line,central line for the average and for the lower control limit there is lower line.

b)

Summary Introduction

Interpretation: plot the observations on control chart.

concept introduction::The chart of control is a graph utilized to analysis how a procedure changes over time. Data are mapped in time request. Each time in control chart, for the upper control limit there is upper line,central line for the average and for the lower control limit there is lower line.

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Webster Chemical Company produces mastics and caulking for the construction industry. The product is blended in large mixers and then pumped into tubes and capped. Management is concerned about whether the filling process for tubes of caulking is in statistical control. The process should be centered on 8 ounces per tube. Several samples of eight tubes were taken, each tube was weighed, and the weights in Table were obtained. Ounces of Caulking Per Tube   Tube Number Sample 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7.98 8.33 7.89 8.24 7.87 8.13 8.34 8.22 7.77 8.18 8.13 8.14 8.02 8.08 7.91 7.83 7.92 8.11 7.94 8.51 8.04 8.05 7.99 8.13 8.44 8.41 8.00 7.90 8.10 8.14 7.68 8.28 7.89 8.16 7.81 8.12 7.81 8.09 7.93 7.97 8.14 8.13 8.11 8.16 8.09 8.07 7.88 8.14 a. Assume that only six samples are sufficient and develop the control charts for the mean and the range.b. Plot the observations on the control chart and comment on your findings.
Describe how to construct process control charts and use them to determine whether a process is out of statistical control.
Explain how to construct process control chart and use them to determine whether a process is out of statistical control?
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