Quality and Reliability Methods - SAS

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192 Pareto Plots Chapter 11 Defect Per Unit Analysis Defect Per Unit Analysis The Defect Per Unit analysis enables you to compare defect rates across groups. JMP calculates the defect rate as well as 95% confidence intervals of the defect rate. You can also specify a constant sample size on the launch dialog. Although causes are allowed to be combined in Pareto plots, the calculations for these analyses do not change correspondingly. Using Number of Defects as Sample Size As an example of calculating the rate per unit, use the Failures.jmp sample data table (Note that this is not Failure.jmp, but Failures.jmp). After assigning Causes to Y, Cause and Count to Freq, click OK to generate a Pareto plot. When the chart appears, select Count Analysis > Per Unit Rates from the platform drop-down menu to get the Per Unit Rates table shown in Figure 11.16. Figure 11.16 Per Unit Rates Table There was no sample size entered on the launch dialog, so the total number of defect counts across causes is used to calculate each rate and their 95% confidence interval. Using a Constant Sample Size Across Groups Using Failures.jmp, fill in the dialog as shown in Figure 11.17 and click OK. Note that checking Per Unit Analysis causes options to appear.
Chapter 11 Pareto Plots 193 Defect Per Unit Analysis Figure 11.17 Pareto Launch Dialog When the report appears, select Count Analysis > Test Rates Across Groups. This produces the analysis shown in the bottom of Figure 11.18. Figure 11.18 Group Comparison Output
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Version 10 Quality and Reliability
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INDIRECT OR CONSEQUENTIAL DAMAGES O
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6 Nelson Rules . . . . . . . . . .
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10 Other Menu Options . . . . . . .
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12 Reliability Forecast Platform Op
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Chapter 1 Learn about JMP Documenta
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Chapter 1 Learn about JMP 17 Book C
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Chapter 1 Learn about JMP 19 Book C
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Chapter 2 Statistical Control Chart
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Chapter 3 Introduction to Control C
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Chapter 4 Interactive Control Chart
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Chapter 5 Shewhart Control Charts V
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Chapter 16 Degradation Using the De
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Chapter 16 Degradation 279 Overview
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Chapter 16 Degradation 291 Inverse
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Chapter 19 Reliability and Survival
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References Abernethy, Robert B. (19
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References 407 Carroll, R.J., Ruppe
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References 409 Haaland, P.D. (1989)
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References 411 Lawless, J.F. (1982)
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References 413 Nelson, W.B. (2003),
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References 415 Snee, R.D. and Marqu
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Index JMP Quality and Reliability M
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Index 419 Fit SEV 242 Fit Weibull 2
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Index 421 Q Quantiles table 356 R R
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Index 423 Weibull Plot 360 Westgard
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Quality and Reliability Methods - SAS

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