# Question: Using the residuals from the regression models in Exercise 11 19

Using the residuals from the regression models in Exercise 11.19, set up EWMA control charts. Compare these EWMA control charts to the She whart charts for individuals constructed previously. What are the potential advantages of the EWMA control chart in this situation?

## Answer to relevant Questions

Consider the p = 4 process variables in Table 11.6. After applying the PCA procedure to the first 20 observations data (see Table 11.7), suppose that the first three principal components are retained. Rework Exercise 11.5, assuming that the subgroup size is n = 5. m = 30 preliminary samples, n = 5 sample size, p = 6 characteristics, = 0.005 (a) Find the phase II control limits assuming that = 0.005. (b) Compare ...Consider the data in Table 12.1. Construct a bounded adjustment chart using λ = 0.4 and L = 10. Compare the performance of this chart to the one in Table 12.1 and Fig. 12.12. Show how a 25 experiment could be set up in two blocks of 16 runs each. Specifically, which runs would be made in each block? An article by L.B. Hare (“In the Soup: A Case Study to Identify Contributors to Filling Variability,” Journal of Quality Technology, vol. 20, pp. 36-43) describe a factorial experiment used to study the filling ...Post your question