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Reliability and Survival Methods > Life Distribution > Example of the Life Distribution Platform
Publication date: 04/21/2023

Example of the Life Distribution Platform

Suppose you want to fit a distribution to the failure times of 70 engine fans, where some of the failure times are censored. You also want to estimate various measurements of reliability.

1. Select Help > Sample Data Folder and open Reliability/Fan.jmp.

2. Select Analyze > Reliability and Survival > Life Distribution.

3. Select Time and click Y, Time to Event.

4. Select Censor and click Censor.

5. Click OK.

The Life Distribution report window appears.

6. In the Compare Distribution report, select Lognormal distribution and the corresponding Scale radio button.

A probability plot appears in the report window.

Figure 3.2 Probability PlotĀ 

Probability Plot

In the probability plot, the data points generally fall along the red line, indicating that the lognormal fit is reasonable.

Below the Compare Distributions report, the Statistics report appears. This report provides a Model Comparison report, nonparametric and parametric estimates, profilers, and more.

Figure 3.3 Statistics ReportĀ 

Statistics Report

The parameter estimates for the lognormal distribution are provided. The profilers are useful for visualizing the fitted distribution and for estimating probabilities and quantiles. For example, the Quantile Profiler indicates that the estimated median time to failure is 25,418.67 hours.

Want more information? Have questions? Get answers in the JMP User Community (community.jmp.com).