Consider the cost information given in exercise 10.30. Suppose that the process model represented by equation 10.31 is appropriate. It requires 2 h to investigate a false alarm, the profit per hour of operating in the in-control state is $500, and it costs $25 to eliminate the assignable cause. Evaluate the cost of the arbitrary control chart design n= 5, k = 3, and h =1.
Answer to relevant QuestionsAn x chart is used to maintain current control of a process. The cost parameters are a1 = $2, a2 = $0.50, a3 = $50, a′3 = $75, and a4 = $200. A single assignable cause of magnitude δ = 1 occurs, and the duration of the ...Reconsider the data in Exercises 10.5 and 10.6. Suppose the process measurements are individual data values, not subgroup averages. In Exercise 10.5 (a) Use observations 1-20 in Exercise 10.5 to construct appropriate group ...Consider the first three process variables in Table 11.5. Calculate an estimate of the sample covariance matrix using both estimators S1 and S2 discussed in Section 11.3.2. 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 ...Consider a T2 control chart for monitoring p = 10 quality characteristics. Suppose that the subgroup size is n= 3 and there are 25 preliminary samples available to estimate the sample covariance matrix. Calculate both the ...
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