Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the

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Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the neck of the bottle, a critical quality dimension that determines whether the bottle cap will fit properly. The dimensions (centimetres) from the last six samples are

Aspen Plastics produces plastic bottles to customer order. The quality

a. Assume that only these six samples are sufficient, and use the data to determine control limits for an R- and an x-chart.
b. Suppose that the specification for diameter for the neck of the bottle is 0.600 ± 0.050 and the population standard deviation is 0.013 cm. What is the process capability index? What is the process capability ratio?
c. If the firm is seeking four-sigma performance, is the process capable of producing the bottle?

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Foundations Of Operations Management

ISBN: 9780133251661

4th Canadian Edition

Authors: Larry P. Ritzman, Lee J. Krajewski, Manoj K. Malhotra, Robert D. Klassen

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