The optimization plot displays the fitted values for the predictor settings. For a linear regression model, examine the prediction intervals in the output to determine whether the range of likely values for a single future value falls within acceptable boundaries for the process.
Use the fit values to identify the point estimate of each response variable for the settings in the optimization plot.
The analysis calculates prediction intervals for models from the Stat menu and models from Linear Regression from the Predictive Analytics Module. The prediction interval (PI) is a range that is likely to contain a single future response value for a specified combination of variable settings. If you collect another data point at the same settings, the new data point is likely to be within the prediction interval. Narrower prediction intervals indicate a more precise prediction
To search for better settings on the optimization plot, adjust the predictor settings directly on the Optimization plot by moving the red vertical bars. For an optimization plot for a Linear Regression, select the Predict button on the toolbar to generate new prediction intervals to determine whether the new solution is acceptable.
Variable | Setting |
---|---|
Material | Formula2 |
InjPress | 98.4848 |
InjTemp | 100 |
CoolTemp | 45 |
MeasTemp | 21.4875 |
Response | Fit | SE Fit | 95% CI | 95% PI |
---|---|---|---|---|
Strength | 32.34 | 1.04 | (29.45, 35.22) | (27.25, 37.43) |
Density | 0.6826 | 0.0597 | (0.5167, 0.8484) | (0.3899, 0.9753) |
Insulation | 25.608 | 0.268 | (24.863, 26.352) | (24.294, 26.921) |
Use your knowledge of the process to determine whether the prediction intervals fall inside acceptable boundaries.