If the time order of production has not been recorded in a set of data from a process, is it possible to detect the presence of assignable causes?
Answer to relevant QuestionsHow do the costs of sampling, the costs of producing an excessive number of defective units, and the costs of searching for assignable causes impact the choice of parameters of a control chart? Apply the Western Electric rules to the control chart presented in Exercise 5.16. Would these rules result in any out-of-control signals? b. Estimate the mean and standard deviation of the process. What are the ± 2 standard deviation limits for the individual data? c. If the specification limits are 41 ± 5, do you think the process is capable of producing ...Continuation of exercise 5.20. The next five measurements on viscosity are 3163, 3199, 3054, 3147, and 3156. Do these measurements indicate that the process is in statistical control? What is meant by the statement that a process is in a state of statistical control?
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