Example of the Fit Life by X Platform
In this example, you are analyzing time-to-failure data for a device operating at accelerated temperatures. No time-to-failure observation is recorded for the normal operating temperature of 10 degrees Celsius; all other observations are shown as time-to-failure or censored values at accelerated temperature levels of 40, 60, and 80 degrees Celsius.
1. Select Help > Sample Data Folder and open Reliability/Devalt.jmp.
2. Select Analyze > Reliability and Survival > Fit Life by X.
3. Select Hours and click Y, Time to Event.
4. Select Temp and click X.
5. Select Censor and click Censor.
6. Leave the Censor Code as 1.
7. Select Weight and click Freq.
8. Select Arrhenius Celsius as the Relationship from the list.
9. Keep the Nested Model Tests option selected.
10. Select Weibull as the distribution.
11. Keep Wald as the confidence interval method.
Figure 4.2 Fit Life by X Launch Window
12. Click OK.
Figure 4.3 Fit Life by X Report Window
The report window shows summary data, diagnostic plots, comparison data and results, including detailed statistics and prediction profilers. Separate result sections are shown for each selected distribution. Distribution, Quantile, Hazard, Density, and Acceleration Factor Profilers are included for each of the specified distributions.