1. A method for creating a dimensioned object model in a CAD system, comprising: receiving 2D CAD data by a CAD system, the 2D CAD data including dimension information; creating a 3D model corresponding to the 2D CAD data, by the CAD system; associating, by the CAD system, the dimension information with features of the 3D model; and storing the 3D model and associated dimension information in the CAD system, wherein the dimension information can thereafter be edited to automatically produce corresponding changes in the 3D model.