Control Chart Examples

# Control Chart Examples - Control Chart Examples Problem...

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All constants can be found in table 5 on page 586 Page 1 Control Chart Examples Problem 5.14. A chemical engineer supervises a new distillation column. Five times each shift, she determines the yield from the column. Table 5.8 lists the yields for 20 shifts. a. Calculate the appropriate control limits for an R-chart and an g G -chart . Use Minitab or R to plot the data. Comment on the results. b. What assumptions did you make when constructing the limits? How comfortable are you with these assumptions? 'SHIFT' 'Y1' 'Y2' 'Y3' 'Y4' 'Y5' Shift Mean Shift Range 1 99.9 96.2 96.8 99.9 94.5 97.46 5.4 2 97.7 96.2 97.1 99.9 99.9 98.16 3.7 3 99 91.3 97.8 95.7 99 96.56 7.7 4 97.8 99.9 97.4 96.6 99.9 98.32 3.3 5 99.9 99.7 99.9 90.9 98.2 97.72 9 6 99.4 98 94.4 99.4 96.4 97.52 5 7 99.9 99.9 95.6 94.9 92.7 96.6 7.2 8 99.1 96.9 98.9 94.3 99 97.64 4.8 9 97.8 98.7 99.9 99.9 97.1 98.68 2.8 10 96.1 97.1 97.9 99.9 94.9 97.18 5 11 97.4 95.5 99.9 99.2 94.5 97.3 5.4 12 99.9 99.3 97.7 97.2 95.9 98 4 13 98.3 95.4

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## This note was uploaded on 10/03/2011 for the course STAT E509 taught by Professor Wheatley during the Spring '10 term at South Carolina.

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Control Chart Examples - Control Chart Examples Problem...

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