An x chart is to be designed for a quality characteristic assumed to be normal with a standard deviation of 4. Specifications on the product quality characteristics are 50 ± 20. The control chart is to be designed so that if the fraction nonconforming is 1%, the probability of a point falling inside the control limits will be 0.99. The sample size is n = 4. What are the control limits and center line for the chart?
Answer to relevant QuestionsAn x chart is to be designed for a quality characteristic assumed to be normal with a standard of 4. Specifications on the quality characteristic are 800 ± 20. The control chart is to be designed so that if the fraction ...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 = ...Consider the temperature data in exercise 10.24. Set up a CUSUM control chart on the residuals from the model you fit to the data in part (c) of that exercise. Compare it to the individuals chart you constructed using the ...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 ...The data shown in Table 11.E1 come from a production process with two observable quality characteristics: x1 and x2. The data are sample means of each quality characteristic, based on samples of size n -= 25. Assume that ...
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