Specifications on a bearing diameter are established at 8.0 ± 0.01 cm. Samples of size n = 8 are used, and a control chart for s shows statistical control, with the best current estimate of the population standard deviation S = 0.001. If the fraction of nonconforming product that is barely acceptable is 0.135%, find the three-sigma limits on the modified control chart for this process.
Answer to relevant QuestionsAn 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 ...Consider the molecular weight data in Exercise 10.16. Construct a EWMA control chart on the residuals from the model you fit to the data in part (c) of that exercise. Let = 0.1 and L = 2.7 (approximately the same as a ...The data shown in Table 10E.10 are temperature measurements made every 2 minutes on an intermediate chemical product (read down, then across from left to right). (a) Calculate the sample autocorrelation function. Interpret ...An x chart is used to maintain current control of a process. The cost parameters are a1 = $0.50, a2 = $0.10, a3 = $25, a′3 = $50, and a4 = $100. A single assignable cause of magnitude δ = 2 occurs, and the duration of the ...A sample of five units is taken from a process every half hour. It is known that the process standard deviation is in control with σ = 2.0. The x values for the last 20 samples are shown in Table 10E.7. Specifications on ...
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