Consider the loan processing cycle time data in Exercise 8.15. Set up an EWMA control chart for monitoring this process using = 0.1. Does the process seem to be in statistical control?
x p50 18.05; p84 20.53; p84 p50 20.5318.0524.8
Answer to relevant QuestionsConsider the hospital emergency room waiting time data in Exercise 8.16. Set up a CUSUM chart for monitoring this process. Does the process seem to be in statistical control? x p50 4.55; p84 7.34; p84 ...Consider the “minute clinic” waiting time data in Exercise 6.66. Set up an EWMA control chart for monitoring this process using = 0.4. Compare this EWMA chart to the one from Exercise 9.16. Rework Exercise 9.23 using an EWMA with = 0.10. = 0.1; L = 2.7; CL = 0 = 734.5; = 108.7 Reconsider the data in Exercise 9.8. Set up and apply an EWMA control chart to these data using = 0.05 and L = 2.6. 5.634, CL = 0 = 175, UCL = 177.30, LCL = 172.70. A machine is used to fill cans with motor oil additive. A single sample can is obtained. Since the filling process is automated, it has very stable variability, and long experience indicates that σ = 0.05 oz. The individual ...
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