CMU School of Drama


Wednesday, March 04, 2026

Introduction to GD&T

Protocase Blog: Manufactured pieces can differ in size and dimensions from an original CAD model due to variations in the manufacturing processes. To optimally control and communicate the allowable variations, engineers and manufacturers working under the American Society of Mechanical Engineers (ASME) standards, use a symbolic language called Geometric Dimensioning and Tolerancing (GD&T).

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