Quality and Reliability Methods - SAS

Chapter 14
Lifetime Distribution II
The Fit Life by X Platform
The Fit Life by X Platform helps you analyze lifetime events when only one factor is present. You can access
the Fit Life by X platform by selecting it from the Reliability and Survival menu.
You can choose to model the relationship between the event and the factor using various transformations.
Available transformation options include: Arrhenius (Celsius, Fahrenheit, and Kelvin), Voltage, Linear,
Log, Logit, Reciprocal, Square Root, Box-Cox, Location, and Location and Scale.
Using the Fit Life by X platform, you can also create a Custom transformation of your data. (See “Using the
Custom Relationship for Fit Life by X” on page 258.) You can even specify No Effect as an option. You also
have the flexibility of comparing different distributions at the same factor level and comparing the same
distribution across different factor levels. (See Figure 14.1.)
Figure 14.1 Scatterplot Showing Varying Distributions and Varying Factor Levels