1. Describe the difference between process control and process capability. Is it safe to state that a process that is in control is capable? Is it safe to say that a capable process is in control? Provide an example of a process that is in control and one which is capable.

2. What is the difference between the distribution of process averages and the distribution of individuals for data that is reported in subgroups of 5. Sketch the distribution of process individuals and the distribution of process averages for such a situation.

3. Calculate an estimate of standard deviation for the following control chart data:

n = 5

X double bar = 24.8 (average of subgroup averages)

R bar = 6.1 (average range)

4. What percent of product would be expected to be outside of specification for problem #3 above, give USL = 30 and LSL = 20?

5. What are the upper and lower process limits for problem #3 above?

6. Calculate the Cp and Cpk values for problem #3 above.

7. Interpret the Cp and Cpk values for problem #6 above. What likely alternative actions are possible and recommended?