Geometric dimensioning and tolerancing is a lot more than just the 14 geometric control symbols. In simplified terms, GD&T is a means of dimensioning and tolerancing a part with respect to the function of the part and the relationship that the part has to its mating part.

State-of-the-art design and manufacturing technology does not make it any easier to precisely communicate functional requirements in drawings. GD&T is essential for clear communication, so that production matches design and inspection understands what and how to measure. Lack of awareness of this fundamental principle can result in costly mistakes which negatively impact the company’s profitability.

Geometric Drafting Training and Consulting (GDTC) is committed to train design, manufacturing, and quality personnel the technology of Geometric Dimensioning & Tolerancing (GD&T) using a comprehensive and effective curriculum, so that manufacturers and suppliers can deliver high quality, best-cost products to customers on time.