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Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay
Edition 9ISBN: 978-1285069463Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay
Edition 9ISBN: 978-1285069463 Exercise 33
Suppose that a refrigeration process at Coolfoods, Ltd. Has a normally distributed output with a mean of 25.0 and a variance of 1.44.
a. If the specifications are 25.0 ± 3.25, compute C p , C pk , and C pm. Is the process capable and centered?
b. Suppose the mean shifts to 23.0 but the variance remains unchanged. Recompute and interpret these process capability indexes.
c. If the variance can be reduced to 40 percent of its original value, how do the process capability indices change (using the original mean of 25.0)?
a. If the specifications are 25.0 ± 3.25, compute C p , C pk , and C pm. Is the process capable and centered?
b. Suppose the mean shifts to 23.0 but the variance remains unchanged. Recompute and interpret these process capability indexes.
c. If the variance can be reduced to 40 percent of its original value, how do the process capability indices change (using the original mean of 25.0)?
Explanation
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Managing for Quality and Performance Excellence 9th Edition by James Evans,William Lindsay
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