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Don Day is president of Tec-Ease Inc. (Cherry Creek, NY), a mechanical engineer, professor emeritus and a standards developer. For more information, e-mail don@tec-ease.com, call Tec-Ease Inc. at (888) TEC-EASE or visit www.tec-ease.com.
What geometric dimensioning and tolerancing (GD&T) is depends on one’s discipline. To the designer it is a way to describe the design intent of individual parts. To someone in production it is the language of modern print reading. To someone working in metrology it is a guide to the inspection of parts. To management it is a concurrent engineering tool that provides clear communication across the enterprise.