The Iterative alignment command allows the use of several point-reducible features to best-fit them to their corresponding nominal values.
One difference of the Iterative versus CAD=PART is that the Iterative alignment does not require a constructed coordinate system. Measure will use the coordinate system defined in the CAD Model.
See the attached document for pictures and details as well as tips.
Click here to download: Iterative Alignment
Keywords: best fit, alignment, iterative