One example is Unigraphics' WAVE, which manages complex assembly relationships and alternative configurations. Unigraphics has continually refined it, and it's now a key element in the program's new predictive engineering functions. For many individual CAD users the first two points count the most, although the others can make a significant impact. Flexible hybrid modeling Unigraphics provides a single hybrid design environment that incorporates 2D layouts, wire frame, surfaces, and solids. You can manipulate solids explicitly or with features and parametrics.
Geometry can be fully parametric, underconstrained, and mixed in a thoroughly reliable manner.
Blending, filleting, and shelling operations are about as good as they get. Unigraphics v16 provides many more ways to create geometry than do most other systems. As an example of Unigraphics v16's breadth, we found ten different ways to create a cube. This aircraft fuselage assembly contains 5,000 components. It loaded over a network in about 1 minute on an average Windows NT CAD workstation.