Apply the Western Electric rules to the control chart in Exercise 5.17. Are any of the criteria for declaring the process out of control satisfied?
Answer to relevant QuestionsSketch warning limits on the control chart in Exercise 5.19. Do these limits indicate any potential out-of-control conditions? Construct a cause-and-effect diagram that identifies the possible causes of consistently bad coffee from a large-capacity office coffee pot. What are warning limits on a control chart? How can they be used? Control charts on and s are to be maintained on the torque readings of a earing used in a wingflap actuator assembly. Samples of size n = 10 are to be used, and we know from past experience that when the process is in ...Control charts for x and R are maintained for an important quality characteristic. The sample size is n= 7; x and R are computed for each sample. After 35 samples we have found that (a) Set up x and R charts using these ...
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