When you fit a model in the Fatigue Model platform, a model report appears that enables you to evaluate the model fit and make inferences regarding your data using the fitted model. Each model report initially contains a Summary tab and a menu of options to show more output and save values to the data table.
The Summary tab contains a scatterplot of the data with the median curve for the fitted model, as well as the formula and parameter estimates of the fitted model. The options in the Data and Fitted Model red triangle menu align with those in the Data and Fitted Models red triangle menu. See Data and Fitted Models Report Options.
The red triangle menu for each fitted model report contains the following options:
Show Residual Plots
Shows or hides a Residuals tab in the model report. The Residuals tab contains plots for Cox-Snell residuals and standardized residuals.
Show Covariance and Correlation
Shows or hides the Covariance and Correlation tab in the model report. The covariances and correlations reported in this tab are calculated for the original data scale.
Show Life Profilers
Shows or hides the Life Profilers tab in the model report. The Life Profilers tab contains two profilers that enable you to explore the fitted model. The profilers show probability plotted against time and vice versa. Use the Life Distribution Profiler to estimate the probability of failure at a specified time and stress setting. Use the Life Quantile Profiler to estimate the time at which a specified proportion of units fail, given a specified stress setting. For more information about profilers, see “Profiler” in Profilers.
Note: The confidence intervals shown in the profilers are Wald-based intervals. For likelihood-based confidence intervals, use the Custom Estimation tab.
Show Strength Profilers
Shows or hides the Strength Profilers tab in the model report. The Strength Profilers tab contains two profilers that enable you to explore the fitted model. The profilers show probability plotted against the strength variable and vice versa. Use the Strength Distribution Profiler to explore the distribution of the strength variable at a specified number of fatigue cycles. Use the Strength Quantile Profiler to explore the quantile of the strength variable at a specified number of fatigue cycles. For more information about profilers, see “Profiler” in Profilers.
Note: The confidence intervals shown in the profilers are Wald-based intervals. For likelihood-based confidence intervals, use the Custom Estimation tab.
Show Custom Estimation
Shows or hides the Custom Estimation tab. This tab contains four reports that enable you to calculate estimates with confidence intervals for either time, strength, or probability of failure. Using the appropriate report, you must specify two input variables. Both Wald-based and likelihood-based confidence intervals are shown. The confidence level for these intervals is determined by the Confidence Level option in the red triangle menu for each report in the Custom Estimation tab.
Save S-N Curve Formula
Saves a new formula column to the data table. The column contains a formula for the median of the S-N curve for the model.
Save Cox-Snell Residuals
Saves a new column to the data table. The column contains the Cox-Snell residuals for the model.
Save Standardized Residuals
Saves a new column to the data table. The column contains the standardized residuals for the model.
Remove
Removes the fitted model report. This option also removes the model from the Data and Fitted Models scatterplot and the Model Comparisons table.