Quality and Reliability Methods - SAS

Chapter 16 Degradation 289
Model Specification
Figure 16.11 Initial Model Specification
A model is now shown in the script box that uses the Parameter statement. Initial values for the
parameters are estimated from the data. For complete details about creating models that use parameters, see
the Nonlinear Regression chapter in the Modeling and Multivariate Methods book. A nicely formatted view
of the model is shown below the row of buttons.
If desired, type in the text box to name the model. For this example, use the name “Device RR”. After that,
click the Use & Save button to enter the model and activate the other buttons and features. See
Figure 16.12.
Figure 16.12 Model Specification
• The Fit Model button is used to fit the model to the data.
• The Fit by System ID is used to fit the model to every level of Label, System ID.
• The Optimization Settings button is used to change the optimization settings.
• The Delete button is used to delete a model from the model menu.