A product has three quality characteristics. The nominal values of these quality characteristics and their sample covariance matrix have been determined from the analysis of 30 preliminary samples of size n = 10 as follows:
The sample means for each quality characteristic for 15 additional samples of size n= 10 are shown in Table 11E.2. Is the process in statistical control?
Construct a T2 control chart using these data. Use the phase II limits.
Answer to relevant QuestionsUsing 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 ...Consider a T2 control chart for monitoring p = 6 quality characteristics. Suppose that the subgroup size is n= 3 and there are 30 preliminary samples available to estimate the sample covariance matrix. m = 30 preliminary ...Consider the data in Table 12.1. Construct a bounded adjustment chart using = 0.3 and L = 10. Compare the performance of this chart to the one in Table 12.1 and Figure 12.12. The following output was obtained from a computer program that performed a two-factor ANOVA on a factorial experiment. (a) Fill in the blanks in the ANOVA table. You can use bounds on the P-values. (b) How many levels were ...Reconsider the crack experiment from Exercise 13.19. Suppose that the two crack-length measurements were made on two cracks that formed in the same test coupon at each set of test conditions. Are the two observations ...
Post your question