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Comparison of ASME/ISO 1-day ET2025

This course builds on Y14.5 dimensioning and tolerancing practices and explains the major differences between the ASME and ISO standards in a concise, easily understood manner.

Utilizing the expertise of world-renowned GD&T expert Alex Krulikowski, the course focuses on how the standards compare when dealing with symbols, feature control frames, tolerances, form controls, datums, and more. Newly acquired learning is reinforced throughout the class with numerous practice problems.

Each attendee receives a robust collection of learning resources including:
  • A copy of the ASME/ISO Exercise Workbook
  • Class handouts 
Thousands of students have learned GD&T through Alex Krulikowski's textbooks, self-study courses, computer-based training, and online learning. Students who attend this course walk away with more than knowledge—they gain on-the-job skills because the learning materials are performance-based.

Learning Objectives
By attending this class, you will be able to:
  • Explain how ASME and ISO standards are developed
  • Recognize the advantages and cautions of using ASME and ISO standards
  • List the major differences in technical drawing presentation
  • Recognize the major differences between ASME and ISO geometric tolerancing terms and symbols
  • Recognize the major differences between ASME and ISO datum systems
  • Identify the differences in ASME and ISO drawings
Students should have a basic understanding of Y14.5 dimensioning and tolerancing practices.
Standards and Technical Drawings
  • Importance of standards
  • ASME and ISO organizations
  • Stages of standard development
  • Major differences in scope of standard
Advantages and Cautions
  • Why each standard should be used
  • ISO GPS concept
  • Three domains of ISO specifications
  • Comparing ASME and ISO GPS systems
  • Five cautions when using ASME standards
  • Six cautions when using ISO standards
Technical Drawing Presentation Differences
  • Technical drawing standards
  • Items that are the same in both standards
  • View projection methods
  • Dimensioning termination and presentation methods
  • Dimensioning symbols
  • Angular tolerance interpretation
  • Workpiece edge requirements and general tolerance specification
  • Size dimensions and limits and fits expressions
  • Surface texture is specification
Tolerancing Term Differences
  • Feature and feature of size
  • Envelope requirement and independency principle
  • Eight major terms
  • Bonus tolerance and collective requirement
Datum System Differences
  • Datum specifications
  • Datum interpretations
  • Candidate and single solution datums
  • Datum target specifications
Geometric Tolerancing Symbol Differences
  • Specification / use for each geometric tolerance symbol
  • Interpretation for each geometrical tolerance
  • Specification / use for modifiers and symbols
ASME and ISO Drawing Differences
  • Applicable standards
  • Drawing symbol differences
  • Geometrical tolerance specification and interpretation differences

All SAE GD&T instructors are industry professionals with years of experience applying GD&T on the job. Our trainers have:

  • Expert knowledge of the Y14.5 Standard
  • ASME certified and/or ASQ certified
  • Current or recent industrial experience using GD&T
  • At least five years of experience using GD&T
  • Experience and skill using the teaching materials

Our instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

Hotel & Travel Information

Fees: $835.00
SAE Members: $752.00 - $752.00

.7 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

For additional information, contact SAE Customer Service 1-877-606-7323 (724-776-4970 outside the U.S. and Canada) or at

Duration: 1 Day
Upcoming open enrollment dates being scheduled. Please check back.

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