Beginning SmartGD&T™for Design, Manfacturing & Inspection
Beginning SmartGD&™ for Design, Manufacturing & Inspection

(Available for ASME Y14.5 and ISO 1101)


Upon completion of the course, students will be able to:

  1. Recognize and name the common GD&T symbols, including Geometry Control Tool symbols, Datum Feature labels, Feature Control Frames and Material Condition Modifiers
  2. Comprehend the differences between, and work effectively with nominal, BASIC and reference dimensions
  3. Understand and work effectively with Cartesian coordinate systems and 3rd angle projection drawings
  4. Recognize the four distinct categories of geometric characteristics: size, form, orientation and location
  5. Apply the most important Geometry Control Tools (Position, Flatness, etc.) to tolerance simple objects
  6. Comprehend the "Material Condition" concept, the Envelope Rule and the Maximum Material Condition tolerance bonus
  7. Understand Datum Features and how they define Cartesian coordinate systems
  8. Create and "read" Feature Control Frames
  9. Understand the objectives and benefits of GD&T versus classical methods for managing machine part geometry

This course is delivered in two days, providing adequate time for hands-on implementation of concepts in early encoding and decoding exercises.

Target Audience:

All persons dealing with Product Design, Drafting, Tool Design and Maintenance, Machining, Manufacturing Management, Manufacturing Process Control, Inspection, Robotic and manual Assembly, Vendor Relations and Purchasing.


Course handouts include a dedicated course manual and sundry articles and flyers. Participants are encouraged to provide their own lined pads and pencils (making it easy to erase occasional mistakes), and examples of drawings (with overhead slides) and parts they wish to discuss.


In the case of in-house corporate classes, a non-disclosure agreement should be implemented between the sponsor and Multi Metrics, Inc. prior to inception. Drawings and parts brought to public classes should be non-proprietary in nature.


Day 1:

  • What is GD&T? What is the ASME Y14.5M 1994 standard (OR what is the ISO 1101 standard)?
  • Perfect and imperfect geometry / seeing the pathology!
  • Geometric Characteristics: Size, Form, Orientation & Location
  • Cartesian coordinate systems and their characteristics
  • The relationship between CAD Models and "blue prints"
  • Getting to 2D from 3D: how the "third angle projection" works
  • The ASME Y14.5 (or ISO 1101) Tool Set: Tolerance Symbols, Datum Feature labels, BASIC dimensions, nominal dimensions, reference dimensions, Feature Control Frames, Material Condition and other tolerance zone Modifiers.
  • Datum Features, Datums and Datum Reference Frames
  • Tolerance Zone examples and "tolerances"
  • A primer on reading / decoding Feature Control Frames

Day 2:

  • Controlling Size and the Envelope Rule
  • The Universal rules of GD&T
  • GD&T encoding and decoding exercises.
  • Decoding GD&T for manufacturing process planning
  • Decoding GD&T for inspection process planning
  • A Grand Review of the Tools and Objectives of GD&T

Copyright © 2013 by Multi Metrics, Inc., Menlo Park, CA 94025   All Rights Reserved Back to Top