Provides a topographical view of the predicted process output (usually modeled through a DOE) versus two of the process inputs.
|When to Use||Purpose|
|Mid-project||Helps to visualize the effects of two process inputs (factors) on the process output. The contours on the graph represent values of the predicted process output at various settings of the two factors on the plot.|
|Mid-project||Helps to assess the region around an optimal solution. If the region around the optimum is relatively flat, the optimum is robust to variation in the two factors. If the region is not relatively flat, any deviation of the one or both of the two factors could have serious consequences on the process output.|
|Mid-project||Used as a graphical aid when using regression, ANOVA, or DOE.|
Continuous Y, two continuous X’s.