List four rules for detecting abnormal (special cause) observations in a control chart.
Answer to relevant QuestionsSet up control limits for an x-bar chart, given x-bar = 12.50, R–bar = .42, and n = 5. Set up limits for the R–bar chart, given R–bar = 0.82 and n = 6. Find the Cp and Cpk indexes for a process with μ = 55.4, σ = 0.1, LSL = 55.2, USL = 55.9. How would you rate the capability of this process? Explain. A process has specification limits of LSL 5 540 and USL 5 550. The process standard deviation is 5 1.25. Find the Cp and Cpk capability indexes if (a) The process mean is 545; (b) The process mean is 543. Refer to the freezer data's 80 individual temperature observations in problem 17.52. (a) Pre- pare a histogram and/or normal probability plot for the sample. (b) Does the sample support the view that freezer temperature is ...
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