Understanding Geometric Dimensioning and Tolerancing

Course Objectives

This course will focus on interpreting and application of Geometric Dimensioning and Tolerancing (GD&T) based on ASME Y14.5 standard; simple design GD&T; dimensional metrology used in GD&T system; single segment, multi-segment and composite feature control frames; and the symbols use as communication tools.

  • Understand certain importance terms are used in GD&T and the contents of a feature control frame that use as geometric control to the feature(s).
  • Know the object consist of four major geometric characteristics with fourteen elements group into five family used to geometric controls for a mechanical part.
  • Understand GD&T symbols and abbreviations are used to specify the functional relationship be­tween or within part features and have specific rules about them that have a direct bear­ing on how the part must be inspected and produce.
  • Understand types of features either regular or irregular that will decide which the geometric tolerance is suitable to attach at the feature.
  • Understand the application of the modifiers, it helps to improve accept more functional parts by maximizing the tolerances that will increase productivity.
  • Determine the bonus tolerance when the feature implied MMC or LMC and the virtual condition size when the feature is modified with MMC.
  • Knowing the four practical steps of applying GD&T in engineering drawings that provide a design guarantee for the product to have the proper fit, form, function and/or reliability.
  • Understand datum that is the starting point for the measurement and setting for the part to manufacture that will produce the products are according to designer intention, and calculation of measured tolerance zone.
  • Understand a variety of inspection and gauging equipment, and gauging method that will properly evaluate the part feature being controlled.
  • Demonstrate Proficiency in the requirements for the engineering drawing with the GD&T system and then increase interesting using the GD&T system, which is the complete specification for easy and complete communicates to others, which will be becoming increasingly important with the growing interrelated ownerships of companies around the world.

Target Audience

  • Automotive
  • Aerospace
  • Engineering
  • Tooling
  • Fabrication
  • Mould maker
  • Medical devices manufacturer
  • Industries involving GD&T


Training slides, Demo Kits, Review Questions, Exercises, Case Study, Q&A, Test Before Training, Test After Training. (Optional: CMM measurement)

Course Modules

  • Module 1 : Introduction to Geometric Dimensioning & Tolerancing (GD&T)
  • Module 2 : The Modifiers of GD&T
  • Module 3 : General Rules For GD&T
  • Module 4 : Symbols and Abbreviation
  • Module 5 : Datum
  • Module 6 : Form Controls
  • Module 7 : Orientation Controls
  • Module 8 : Location Controls
  • Module 9 : Composite Controls
  • Module 10 : Review Questions
  • Module 11 : Appendix (Terminology)
  • Module 12 : References

Get To Know The Trainer

Trainer Ng


Dr Ng is a qualified trainer registered with PSMB. He has been in Metrology career since 1991, he is a PhD holder in Business (Sunway University), doing research by using Applied Statistics, Master of Science in Statistics (UM), BSc in Chemistry (UM) and also holds his EC Part II in Electrical and Electronic (UK), having Professional Certification from America Society for Quality for: Certified Quality Engineer (CQE), Certified Quality Auditor (CQA), Certified Quality Inspector (CQI), Certified Quality Improvement Associate (CQIA), Certified Calibration Technician (CCT) and Certified Six Sigma Green Belt (CSSGB). His multi-disciplinary educational background enabled him to create the essence of the company’s core technologies.

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