About optimization criteria

Optimization criteria are collections of nodes you save, that define areas on your part whose tolerance specifications are of particular interest to you. Use optimization criteria to assess the effects of warpage on the quality of your molded part.

Note: Optimization criteria are included in DOE or Parametric Study analyses by default. Find them in the Criteria tab of the builder.

Optimization criteria include:

Optimization Criterion	Use this criterion to....
Critical Dimension	Measure how the location of two nodes changes with respect to one another, following a warp analysis
Flatness	Measure the extent to which the selected face has moved out-of-planar, following a warp analysis. The out-of-flatness value is the minimum distance between two parallel planes that straddle all the selected points. The two parallel planes may not be parallel to any surfaces in the original geometry, nor to any coordinate axes. The orientations of the planes are determined by minimizing the sum of squared errors to find the plane which best fits all the selected nodes. Flatness does not report the deflection from any original geometry.
Roundness	Measure the extent to which the selected edge changes from its original curvature, following a warp analysis Out-of-Roundness describes the maximum total deviation of the selected nodes from a best-fit circle. The maximum total deviation is the sum of the largest positive and largest negative deviation from the circle radius. The best-fit circle may not align with any features in the original geometry, nor to any coordinate axes. Roundness does not report the deviation from any original geometry.

Optimization Criterion

Use this criterion to....

Critical Dimension

Measure how the location of two nodes changes with respect to one another, following a warp analysis

Flatness

Measure the extent to which the selected face has moved out-of-planar, following a warp analysis.

The out-of-flatness value is the minimum distance between two parallel planes that straddle all the selected points. The two parallel planes may not be parallel to any surfaces in the original geometry, nor to any coordinate axes. The orientations of the planes are determined by minimizing the sum of squared errors to find the plane which best fits all the selected nodes. Flatness does not report the deflection from any original geometry.

Roundness

Measure the extent to which the selected edge changes from its original curvature, following a warp analysis

Out-of-Roundness describes the maximum total deviation of the selected nodes from a best-fit circle. The maximum total deviation is the sum of the largest positive and largest negative deviation from the circle radius. The best-fit circle may not align with any features in the original geometry, nor to any coordinate axes. Roundness does not report the deviation from any original geometry.