The failure of diesel generator fans was studied by Nelson (1982, p. 133) and Meeker and Escobar (1998, app. C1).
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Select Analyze > Reliability and Survival > Survival.
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Select the check box for Plot Failure instead of Survival.
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Click OK.
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Figure 12.8 Fan Initial Output
Notice that the probability of failure increases over time. Often the next step is to explore distributional fits, such as a Weibull model. From the red triangle menu, select Weibull Plot and Weibull Fit.
Figure 12.9 Weibull Output for Fan Data
Because the fit is reasonable and the Beta estimate is near 1, you can conclude that this looks like an exponential distribution, which has a constant hazard rate. From the red triangle menu, select Fitted Distribution Plots. Three views of the Weibull fit appear.
Figure 12.10 Fitted Distribution Plots
