Launch the Fit Life by X platform by selecting Analyze > Reliability and Survival > Fit Life by X.
The Fit Life by X Launch Window
If you select Location or Location and Scale, a message might appear stating that “Analysis must exclude groups that are all right censored to continue Nested Model Tests. Do you want to continue?” Click Yes to continue the analysis. Right censored groups indicate groups where all observations are right censored. The message does not appear if your sample data does not include right censored observations.
See Custom Relationship if you want to use a Custom relationship for your model.

Help created on 9/19/2017