Launch the Fit Life by X platform by selecting Analyze > Reliability and Survival > Fit Life by X.
Figure 3.4 The Fit Life by X Launch Window
Identifies the time to event (such as the time to failure) or time to censoring. With interval censoring, specify two Y variables, where one Y variable gives the lower limit and the other Y variable gives the upper limit for each unit. For details about censoring, see Event Plot in Life Distribution.
Identifies the relationship between the event and the accelerating factor. Table 3.1 defines the model for each relationship.
If you select Box-Cox, a text edit box appears below the Use Condition option. Use this box to specify a lambda value. The BoxCox( X ) transformation for a specified λ is defined as follows:
See Custom Relationship if you want to use a Custom relationship for your model.
Note: The Confidence Interval Method preference enables you to select the Likelihood method as the default confidence interval method. You can change this preference in Preferences > Platforms > Fit Life by X.