Operations and Supply Chain Management, 9th Edition WileyPLUS Registration Card + Loose-leaf Print Companion
Operations and Supply Chain Management, 9th Edition WileyPLUS Registration Card + Loose-leaf Print Companion
9th Edition
ISBN: 9781119371618
Author: Roberta S. Russell
Publisher: Wiley (WileyPLUS Products)
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Chapter 3, Problem 39P
Summary Introduction

To draw: The process capability ratio and index.

Introduction

Statistical process control is a statistical technique used to analyze the functioning of production process. It helps to determine the factors that leads to poor quality in the production process. It also determines the measures that has to be taken in order to correct the production process.

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The specifications for a gasket that installs between two engine parts calls for a thickness of 6.0 mm ± .2 mm. The standard deviation of the process is estimated to be 0.05 mm. The process is known to operate at a mean thickness of 6.1 mm   What are the upper and lower specification limits for the gasket? What are the Cp and Cpk values for this process? Is this process capable of producing the desired part?
A. Choudhury’s bowling ball factory in Illinois makes bowling balls of adult size and weight only. The standard devia-tion in the weight of a bowling ball produced at the factory is known to be 0.12 pounds. Each day for 24 days, the averageweight, in pounds, of nine of the bowling balls produced that dayhas been assessed as follows:  a) Establish a control chart for monitoring the average weights of the bowling balls in which the upper and lower control lim-its are each two standard deviations from the mean. What are the values of the control limits?b) If three standard deviations are used in the chart, how do thesevalues change? Why?
The production manager at Sunny Soda, Inc., is interested in tracking the quality of the company’s 12-ounce bottle filling line. The bottles must be filled within the tolerances set for this product because the dietary information on the label shows 12 ounces as the serving size. The design standard for the product calls for a fill level of 12.00 ± 0.10 ounces. The manager collected the following sample data (in fluid ounces per bottle) on the production process:   Observation Sample 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 12.00 11.91 11.89 12.10 12.08 11.94 12.09 12.01 12.00 11.92 11.91 12.01 11.98 12.02 12.00 11.97 11.94 12.02 12.09 11.92 11.98 12.00 12.04 11.96 11.94 11.99 12.00 11.99 12.00 12.05 12.10 12.10 11.97 12.05 12.12 12.06 12.00 11.99 11.97 12.09 12.05 12.06 12.06 12.05 12.01 12.08 11.96 11.99 11.95 12.05 12.08 12.03 11.95 12.03 12.00 12.10 11.97 12.03 11.95 11.97 a. Are the process average and range in statistical control?b. Is the process capable…

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Operations and Supply Chain Management, 9th Edition WileyPLUS Registration Card + Loose-leaf Print Companion

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