2006
AL#87 p.40               read this article
R.M. Mottola                                                                                           

▪ Parametric solid modeling is a usable step between computer aided design and computer aided manufacturing. It permits a three-dimensional picture of a part to be made. A CNC machine doesn’t need it, but a designer might in order to better visualize what it is the machine is about to make. If this makes no sense to you, welcome aboard. But CAD/CAM/CNC-made instrument parts are here to stay, even for small shops. Understanding the process will give you an edge over the stick-in-the-muds who can’t be bothered. With 9 illustrations.