# Question

Consider the piston ring data shown in Table 6.3. Assume that the specifications on this component are 74.000 0.05 mm.

(a) Set up x and R control charts on this process. Is the process in statistical control?

(b) The control limits on the x chart in part (a) are identical to the control limits on the x chart in Example 6.3, where the limits were based on s. Will this always happen?

(c) Estimate process capability for the piston-ring process. Estimate the percentage of piston rings produced that will be outside of the specification.

(a) Set up x and R control charts on this process. Is the process in statistical control?

(b) The control limits on the x chart in part (a) are identical to the control limits on the x chart in Example 6.3, where the limits were based on s. Will this always happen?

(c) Estimate process capability for the piston-ring process. Estimate the percentage of piston rings produced that will be outside of the specification.

## Answer to relevant Questions

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