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Cusum Chart

The data in the following table are individual temperature readings from a chemical process in oC, taken every two minutes (read in sequence top to bottom and left to right). The target value for the mean is 950 oC. (a) Estimate the process standard deviation. (b) Set up and apply a tabular cusum chart for this process, using standardized values h = 5 and k = ½. (c) Interpret the cusum chart. (c) Plot the temperature data in this problem as an EWMA control chart using lambda = 0.1 and L = 2.7. Interpret the EWMA control chart in comparison to the cusum chart.

Please see the attachment for the EWMA control chart.


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This solution is comprised of a detailed explanation of Cusum Chart. In this solution, step-by-step explanation of this complicated topic provides students with a clear perspective of making cusum chart in Minitab along with the screen shot.