A manufacturing process operates with an in-control fraction of nonconforming production of at most 0.1%, which management is willing to accept 95% of the time; however, if the fraction nonconforming increases to 2% or more, management wishes to detect this shift with probability 0.90. Design an appropriate acceptance control chart for this process.
Answer to relevant QuestionsConsider a modified control chart with center line at µ = 0 and σ = 1.0 (known). If n = 5, the tolerable fraction nonconforming = 0.00135, and the control limits are at three-sigma, sketch the OC curve for the chart. ...The data in Table 10E.8 are molecular weight measurements made every two hours on a polymer (read down, then across from left to right). (a) Calculate the sample autocorrelation function and provide an interpretation. (b) ...Consider the concentration data in Exercise 10.20. Construct a EWMA chart on the residuals from the model you fit in part (c) of that exercise. Discuss how you would use a CUSM in the short production-run situation. What advantages would it have relative to a Shewhart chart, such as a DNOM version of the x chart? 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 ...
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