A Shewhart x chart has center line at 10 with UCL = 16 and LCL = 4. Suppose you wish to supplement this chart with an EWMA control chart using = 0.1 and the same control limit width in σ-units as employed on the x chart. What are the values of the steady-state upper and lower control limits on the EWMA chart?
Answer to relevant QuestionsAn EWMA control chart uses = 0.4. How wide will the limits be on the Shewhart control chart, expressed as a multiple of the width of the steady-state EWMA limits? For EWMA, steady-state limits are Rework Exercise 9.4 using the standardized CUSUM parameters of h = 8.01 and k = 0.25. Compare the results with those obtained previously in Exercise 9.4. What can you say about the theoretical performance of those two CUSUM ...Consider a modified control chart with center line at µ = 0 and σ = 1.0 (known). If n = 5, the tolerable fraction nonconforming = 0.00135, and the control limits are at three-sigma, sketch the OC curve for the chart. ...Set up a moving center-line EWMA control chart for the molecular weight data in Exercise 10.16. Compare it to the residual control chart in Exercise 10.16, part (c). To find the optimal , fit an ARIMA (0,1,1) (= EWMA = ...Set up a moving center line EWMA control chart for the temperature data in Exercise 10.24. Compare it to the residuals control chart in Exercise 10.24, part (c). To find the optimal , fit an ARIMA (0,1,1) (= EWMA = ...
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