# 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 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 σ is constant.

(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 σ is constant.

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