Question: 30 30 = Problem 2 Control charts for and R are maintained for an important quality characteristic. The sample size is n = 8. and

30 30 = Problem 2 Control charts for and R are

30 30 = Problem 2 Control charts for and R are maintained for an important quality characteristic. The sample size is n = 8. and R are computed for each sample; after 30 samples, we have found that it di = 6729 and 23. Ri = 1032. 1 (a) Set up and R charts using these data. (b) Assuming that both charts exhibit control, estimate the process mean and standard deviation. (c) Given the specification limits USL = 240 and LSL = 180, evaluate the process capability with Cp. =

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