Geometric Dimensioning and Tolerancing Training – ASME Y14.5M-1994,
ASME Y14.5-2009 (Also ASME Y14.8, ASME Y14.41, etc.)
ASME GD&T Training

Geometrical Dimensioning and Tolerancing Training – ISO 286, ISO 1101, ISO 2768, ISO 5458, ISO 5459, ISO 8015, ISO 14405, ISO 14660, etc. (Also ISO 16792)
ISO GD&T Training

We teach our GD&T courses from a multi-disciplinary point of view. We teach GD&T so every team member understands what the GD&T means, understands how the GD&T works, understands the effect of the GD&T on product function, manufacturing, inspection, and assembly, and understands the effects of the GD&T throughout the product lifecycle. We ensure that your design, manufacturing, inspection, assembly, quality, and service personnel and your suppliers understand GD&T as needed to be successful and produce the highest quality, lowest cost products possible.

Functional Dimensioning and Tolerancing

Functional Dimensioning and Tolerancing is at the core of all of our GD&T courses. All members of the internal and external development and supply chain must understand the functional ramifications of their drawing and model specifications. Our clients learn how to apply GD&T functionally, and we teach their design teams how to make adjustments and tradeoffs with other departments to work toward lower cost functional products. These are the principles of dimensional management.

GD&T in Industry – GD&T Implementation – GD&T in the Supply Chain

We teach dimensional management strategies in all of our courses. We present GD&T from a business point of view and we present GD&T from a legal point of view. In a sense, all of our courses are business courses – we teach GD&T, tolerance analysis, 3D-MBD, and 3D-MBE in a business context. GD&T does not exist on a technical island – it is used and exists in the workplace. We make sure your staff gets this critical point, and we lead them to understand how they can optimize their use of GD&T for the goals of the business. We explain specifications from both a technical point of view and a legal point of view, as engineering drawings and annotated models form part of a contract. Specifications are legally-binding and it is critical that your staff and suppliers understand the implications. There are many constraints in product development and product definition, and it is critical that everyone in the supply chain understands why certain specifications are needed, why they are beneficial, and the pros, cons, and tradeoffs of alternate approaches. It is also critical that your design organization understands the implications of the specifications they create on the rest of supply chain. Any misunderstandings or missteps in any of these areas can be very costly. Our goal is to make sure your staff works toward a common goal as a coherent team. Our goal is your success.

GD&T Training Courses and Seminars

In our GD&T courses and GD&T seminars we teach the concepts, rules and language of GD&T, and as discussed above, we teach the business implications of GD&T. Our GD&T training presents GD&T from a functional viewpoint, discussing the topics from the point-of-view of application to real world problems. Functional Dimensioning and Tolerancing and GD&T in the Workplace™ is what we are all about. We want you to Get-it-Right™.

We offer Beginning, Intermediate, Advanced and Custom GD&T courses and GD&T seminars. We call these GD&T training courses Level 1 GD&T, Level 2 GD&T Applications, and Level 3 GD&T Advanced Applications courses. We also offer Functional Dimensioning and Tolerancing courses and GD&T Certification Preparation seminars. Our GD&T training can be generic or our GD&T training can be adapted to your specific needs. Contact us to find out how we can help you.

Our Level 1 GD&T courses present the details and show how the details fit into the full system of GD&T, from the details to the big picture. Level 1 GD&T explains on the meaning of the symbols and specifications and how to properly specify the needed tolerances. Level 1 GD&T explains the exact meaning of all the Geometric Tolerances, Definitions, the Fundamental Rules, Feature Control Frames and Datum Reference Frames. Functional Dimensioning and Tolerancing concepts are introduced and woven through the curriculum. Level 1 GD&T explains the system of GD&T, how all of the components work together to form a complete, coherent system. We explain how to implement GD&T in the workplace, and how to understand the many tradeoffs between competing interests within the supply chain.

Level 2 GD&T and Level 3 GD&T courses are taught with the requirements of the final product in mind, which includes extensive applications, alternate strategies, and the effect of the GD&T on Tolerance Stackups. Dimensional Management concepts are addressed throughout these courses. We want our clients to understand the implications of the tolerances they specify, including the functional implications and the cost implications of the assembly, manufacturing and inspection processes. The many nuances of GD&T and the importance of syntax and context are discussed in detail. Functional Dimensioning and Tolerancing concepts are further developed and explained throughout the course. In our Level 2 GD&T and Level 3 GD&T courses, your staff will work through real world examples and solve problems that will help them do a better job in the workplace and form more coherent teams. Teamwork is essential in any dimensional management implementation, and our GD&T training will help you develop more effective teams that solve your dimensional management problems optimally.

If desired, our GD&T courses may be customized around your products and problems. Custom courses can be anything you want. Our training has been successful in a variety of environments and contexts.

Onsite GD&T Training Courses

Most of our customers have us present our GD&T Training Courses onsite at their facility. We offer ASME Y14.5-based GD&T Training Courses and ISO 1101-based GD&T Training Courses. Course content can be suited to your needs and practices. Our onsite courses include time to review your designs, drawings, products, and processes.

GD&T, Dimensional Management, and the Big Picture

Although GD&T is a science of the details, it must also be understood in the context of the big picture. If our clients are interested, we also explore the implications of their Dimensioning and Tolerancing Schemes on the rest of their company, helping our students to understand the tradeoffs in cost and quality they make when selecting various Tolerancing Schemes.

We offer the finest in GD&T training. Our GD&T courses and GD&T seminars offer an unparalleled journey through the language of Geometric Dimensioning and Tolerancing. Our explanations and materials are presented in a mathematically precise manner while keeping the material easy to understand and assimilate. We teach GD&T at many companies, from very small to the largest multi-national corporations. And, we are invited back to teach more courses when staff grows or if more advanced training is desired.

Experts in ASME GD&T, ISO GPS, and ISO GD&T

Advanced Dimensional Management LLC trainers are experts in ISO GPS / ISO GD&T standards and ASME GD&T standards, as we participate in the development of ISO GPS and ISO STEP standards, and we participate in the development of ASME Y14.5 and other ASME Y14-series standards. We teach ISO GD&T courses and we teach ASME GD&T courses. While the two GD&T systems look quite similar, there are important differences between the ISO GD&T system and ASME GD&T system. We can help your development team and supply chain if you use the ISO GD&T system or the ASME GD&T system, or even if your development team and supply chain are international and use both systems (ISO GD&T and ASME GD&T) in different parts of the enterprise. We provide services internationally, and we regularly work with multinational corporations in the U.S. and around the world.

3D-GD&T™ and GD&T Applied to 3D Solid Models

Advanced Dimensional Management LLC are experts in 3D-GD&T™, the meaning and implementation of GD&T applied in a 3D context. This includes 3D Model-Based Product Definition (3D-MBD), where the 3D model is used as all or part of the product definition, and 3D Model-Based Enterprise (3D-MBE), where we help you optimize and implement the use of 3D data throughout the product lifecycle and supply chain. We also specialize in teaching GD&T for 3D-MBD and 3D-MBE. We are uniquely qualified to help your company understand what is needed to implement of 3D-GD&T™ to various degrees and become a Model-Based Enterprise.

GD&T Books and GD&T Reference Materials

Our most recent GD&T book, The “GD&T Update Guide” is the preeminent book on the ASME Y14.5-2009 standard. The “GD&T Update Guide” covers all of the new symbols, techniques, tools, and content in the ASME Y14.5-2009 standard. The “GD&T Update Guide” also carefully explains the changes made to ASME Y14.5-2009 in great detail and offers advice where topics are not fully defined or potential confusion may exist in the ASME Y14.5-2009 standard.

GD&T Books

From the author’s notes:

“The “GD&T Update Guide: ASME Y14.5-2009” discusses the principal changes and improvements in the ASME Y14.5-2009 standard. Changes in the structure, philosophy, expansion of scope, and the overall intent of the new revision are discussed. New terms, definitions, symbols, rules, feature types, tools, techniques, approaches, and changes made to each section of the standard are also discussed. The “GD&T Update Guide: ASME Y14.5-2009” also includes a detailed paragraph-by-paragraph explanation of the principal changes in ASME Y14.5-2009.

The “GD&T Update Guide: ASME Y14.5-2009” is used as part of our training courses and is a perfect addition to our highly-regarded books “The Journeyman’s Guide to Geometric Dimensioning and Tolerancing” and the “GD&T Visual Glossary.”

The GD&T Update Guide is a must-have reference for anyone who needs to understand GD&T and the ASME Y14.5-2009 standard.”

We suggest you consider our GD&T and tolerance analysis training courses to help you understand your variation, how to quantify it, how to mitigate its effects in your products, and how to implement dimensional management throughout your enterprise.


Bryan R. Fischer is President of Advanced Dimensional Management LLC in Sherwood, Oregon, offering leading-edge training and consulting in Dimensioning and Tolerancing, GD&T, Tolerance Stackup and Analysis, Dimensional Management, Design, Standards and Quality.

Bryan and our other trainers are ASME Certified Senior Level GD&T Professionals. Bryan and others are members of several ASME sub-committees. Bryan a member of the ASME Y14.5 Sub-committee Support Group, the US TAG to ISO TC213 which develops ISO GPS (GD&T, etc. standards, and directly involved in developing the ASME Y14.5 standard and ISO 1101 and 5459 standards. He is recognized as a leading authority in the theory and application of Dimensioning and Tolerancing, GD&T, Tolerance Analysis and Stackups and Dimensional Management.

He is a published author, having written several books on Geometric Dimensioning and Tolerancing, Tolerance Stackups and Tolerance Analysis. His books “The Journeyman’s Guide to Geometric Dimensioning and Tolerancing: GD&T for the New Millennium” now in its 12th revision, the GD&T Update Guide: ASME Y14.5-2009: Changes, Improvements, and Clarifications, and the GD&T Visual Glossary will be used as the basis for the seminar. His book “Mechanical Tolerance Stackup and Analysis,” now in its second edition (CRC Press 2011) is the preeminent title on Tolerance Stackups and Tolerance Analysis available.

In 2008 Bryan revised the 11th Edition of The IHS Global Drawing Requirements Manual (the DRM), and wrote an extensive new chapter on using Digital Data as Design Deliverables and Annotating Solid Models. This is a book in itself, and is based on the ASME Y14.41-2003 and ISO 16792-2006 standards, and includes material not found in either of those standards. We are leaders in 3D Model-Based Product Definition (3D MBD) and 3D Model-Based Enterprise (3D MBE) Implementation techniques training and consulting. Check out our Books and Materials section and our 3D PMI, MBD, and Advanced Applications of Solid Modeling Seminar and other 3D MBD and 3D MBE courses for more information.