Question: Specifications on a normally distributed dimension are 600 ± 20. x and R charts are maintained on this dimension and have been in control over

Specifications on a normally distributed dimension are 600 ± 20. x and R charts are maintained on this dimension and have been in control over a long period of time. The parameters of these control charts are as follows (n = 9)

(a) What are your conclusions regarding the capability of the process to produce items within specifications?
(b) Construct an OC curve for the chart assuming that Ïƒ is constant.

Chart UCL-616 LCL-604 s Chart UCL-32.36 LCL-3.28 Center line = 610 Center line 17.82

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