Reconsider the situation in Exercise 11.2. Suppose that the sample mean vector and sample covariance matrix provided were the actual population parameters. What control limit would be appropriate for phase II of the control chart? Apply this limit to the data and discuss any differences in results that you find in comparison to the original choice of control limit.
Answer to relevant QuestionsConsider 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 ...If yt are the observations and zt is the EWMA, show that the following relationships are true. yt: Observation and zt: EWMA (a)zt − zt−1 = λ(yt − zt−1) (b) et − (1 − λ)et−1 = yt − yt−1 Use the data in Exercise 12.6 to construct a bounded adjustment chart. Use λ = 0.2 and set L = 12. How does the bounded adjustment chart perform relative to the integral control adjustment procedure in part (a) of Exercise ...A 2 4-1 design has been used to investigate the effect of four factors on the resistivity of a silicon wafer. The data from this experiment are shown in Table 13E.4. Enter the factor levels and resist data into a Minitab ...Discuss why a central composite design would almost always be preferable to a 3k factorial design for fitting a second-order response model.
Post your question