IvanR.Unit8.Quantitative.Analysis

IvanR.Unit8.Quantitative.Analysis - Thus we look at the...

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Sheet1 Page 1 Average Range 9A.M 19.8 20.4 19.9 20.3 20.1 0.6 10A.M 20.1 20.2 19.9 19.8 20 0.4 11A.M 19.9 20.5 20.3 20.1 20.2 0.6 Noon 19.7 19.8 20.3 20.2 20 0.6 1P.M 19.7 20.1 19.9 19.9 19.9 0.4 Grand Average 20.04 0.52 x_bar 20.04 R_bar 0.52 For xbar chart UCL x_bar+A2*'R_bar CL x_bar LCL x_bar-A2*'R_bar For n=4, we have A2=0.729 Thus UCL 20.42 CL 20.04 LCL 19.66 For R chart UCL D4*R_bar CL R_bar LCL D3*R_bar For n=4, we have D3=0 and D4=2.282 Thus UCL 1.19 CL 0.52 LCL 0 To find wheather the process is in control or not we first consider the R chart Range UCL CL LCL 0.6 1.19 0.52 0 0.4 1.19 0.52 0 0.6 1.19 0.52 0 0.6 1.19 0.52 0 0.4 1.19 0.52 0 It is clear from the R chart that the range is in control.
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Unformatted text preview: Thus we look at the xbar chart for our final decision Averages UCL CL LCL 20.1 20.42 20.04 19.67 20 20.42 20.04 19.67 0.6 0.2 0.4 0.6 0.8 1 1.2 1.4 x Sheet1 Page 2 20.2 20.42 20.04 19.67 20 20.42 20.04 19.67 19.9 20.42 20.04 19.67 It is clear from the x_bar chart that the process is in control. 20.1 20 19.2 19.4 19.6 19.8 20 20.2 20.4 20.6 x Sheet1 Page 3 0.4 0.6 0.6 0.4 R chart UCL Range CL LCL x_bar chart Sheet1 Page 4 20.2 20 19.9 x_bar chart UCL Averages CL LCL...
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IvanR.Unit8.Quantitative.Analysis - Thus we look at the...

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