Aspen Plastics produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the
Question:
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
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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?
Step by Step Answer:
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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
