Consider the hub data in Exercise 15-95. (a) Construct an EWMA control chart with λ = 0.2
Question:
(a) Construct an EWMA control chart with λ = 0.2 and L = 3. Comment on process control.
(b) Construct an EWMA control chart with λ = 0.5 and L = 3 and compare your conclusion to part (a).
Exercise 15-95
An article in Quality Engineering [Is the Process Capable? Tables and Graphs in Assessing Cpm (1992, Vol. 4(4)]. Considered manufacturing data. Specifications for the outer diameter of the hubs were 60.3265 ± 0.001 mm. A random sample with size n = 20 was taken and the data are shown in the following table:
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Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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