Build a foundation in Geometric Dimensioning and Tolerancing (GD&T) and understand ways to communicate the functional intent of designs. GD&T is a set of rules, symbols, and tools that allow you to control the critical features of a design to ensure its proper function. You'll have a head start on the design process, saving on both budget and time, by having a basic background of GD&T, its terminology, and the importance of Rule #1. You'll also get a primer on material modifiers, datums, symbols and feature control frames.