The baking time of painted corrugated sheet metal is of interest. Too much time will cause the
Question:
(a) Calculate the centerline and control limits for the - and s-charts.
(b) Estimate the process mean and standard deviation, assuming the process to be in control.
(c) Is the process capable? What proportion of the output is nonconforming?
(d) If the mean of the process can be shifted to 10 minutes, would you recommend such a change?
(e) If the process mean changes to 10.2 minutes, what is the probability of detecting this change on the first sample taken after the shift? Assume that the process variability has not changed.
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Related Book For
Fundamentals of quality control and improvement
ISBN: 978-0470226537
3rd edition
Authors: amitava mitra
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