This example uses Capacitor ALT.jmp and can be found in the Reliability folder of the sample data. It contains simulated data that gives censored observations for three levels of temperature, for a reliability study. Observations are shown as censored values at temperature levels of 85, 105, and 125 degrees Celsius.
1.
Open the Capacitor ALT.jmp sample data table.
2.
Select Analyze > Reliability and Survival > Fit Life by X.
3.
Select Hours and click Y, Time to Event.
4.
Select Temperature and click X.
5.
Select Censor and click Censor.
6.
Leave the Censor Code as 1.
7.
Select Freq as Freq.
8.
Keep Arrhenius Celsius as the relationship, and keep the Nested Model Tests option selected.
9.
Select Weibull as the distribution.
10.
Keep Wald as the confidence interval method.
Fit Life by X Launch Window shows the completed launch window.
Fit Life by X Launch Window
11.
Click OK.
Fit Life by X Report Window for Capacitor ALT.jmp Data shows the top half of the Fit Life by X report window.
Fit Life by X Report Window for Capacitor ALT.jmp Data
1.
Open the Devalt.jmp sample data table.
2.
Select Analyze > Reliability and Survival > Fit Life by X.
3.
Select Hours and click Y, Time to Event, Temp and click X, Censor and click Censor, and Weight and click Freq.
4.
Select Custom as the Relationship from the list.
5.
In the entry field for μ, enter 1, log(:Temp), log(:Temp)^2.
6.
In the entry field for σ, enter 1, log(:Temp).
7.
Select the check box for Use Exponential Link.
8.
Select Weibull as the Distribution.
Custom Relationship Specification in Fit Life by X Launch Window shows the completed launch window using the Custom option.
9.
Custom Relationship Specification in Fit Life by X Launch Window
Weibull Estimates and Formulas for Custom Relationship shows the location and scale transformations, which are subsequently created and included at the bottom of the Estimates report section.
Analysis proceeds similarly to the Example of the Fit Life by X Platform, where the Arrhenius Celsius Relationship was specified.
Weibull Estimates and Formulas for Custom Relationship