Public Workshop Information

TDC of Arizona offers a variety of public workshops during the year throughout the country. Registration for these workshops is open to the public.  This is especially useful for smaller companies that only have a limited number of employees that need training.

What You'll Get Out Of A Workshop

  • You will receive a full complement of class materials (textbooks, study guides, class reference binders, etc.) that are specifically designed to aid the student in understanding the sometimes complex concepts being taught.
  • You will be taught by an instructor who is a Senior Level Certified Dimensioning and Tolerancing Professional (GDTP) with over 31 years of experience; who is passionate about helping students learn about GD&T!
  • You will receive a TDC t-shirt in exchange for completing an evaluation on the course content and the instructor at the end of the workshop.
  • You will receive a Continental breakfast along with a catered lunch each day.
  • Most importantly, you will gain a working knowledge of the subject material and the confidence that goes with the mastery of the subject material.  Knowledge is Power!

Class Location

Many of our GD&T workshops are offered at various locations around the country on a variety of dates.  Shortly after registration for a public GD&T workshop, you will receive specific details for the workshop which includes the location of the workshop, maps, and parking instructions. Many of our public workshops are held in Tucson, Arizona, and San Diego, California.

Presented By:

All classes are presented by Technical Documentation Consultants Of Arizona, Inc.
Contact Us...

Our Instructor Knows What He's Talking About

Michael Sandford began working with GD&T in 1983 as a new employee in the aerospace industry. In his position as a mechanical design engineer, Mr. Sandford has specialized in optic and mechanical packaging. Mr. Sandford has designed machined hardware, castings, tooling and test equipment. He holds several patents in the aerospace industry and has experience in machine shop, assembly and inspection processes. Mr. Sandford has been instrumental in the creation and technical review of design documentation for over 31 years.

He has instructed thousands of students over the past thirteen years at TDC in the proper use of GD&T in accordance with the ANSI Y14.5M-1982, ASME Y14.5M-1994, and the recently released ASME Y14.5-2009 standard.

Mr. Sandford is a certified ASME Senior Level Geometric Dimensioning and Tolerancing Professional (GDTP S-0356)

Is This Workshop For You?

It is, if...

  • You need to communicate with engineering drawings or models.
  • You design or build gages and fixtures.
  • You perform tolerance analysis on parts or assemblies.
  • You machine or inspect parts.
  • You are in any way connected to the production team.
If you not sure you belong to any of the groups above, TDC would like to invite you to complete the "GD&T Challenge", and see if GD&T training can make you a more valuable member of your company.

Who Should Attend?

  • Engineering:

    Design engineers, structural engineers, drafters, drawing checkers.
  • Manufacturing:

    Manufacturing engineers, process engineers, planners, machine programmers, tool and gage designers, toolmakers, machinists.
  • Quality:

    Quality engineers, CMM programmers, parts inspectors. Others: Managers, project engineers, machined part purchasing, procurement personnel.

With Our Teaching Techniques You Can Leave This Workshop A Competent GD&T User

In a TDC workshop, you will view hundreds of presentation slides; you'll gain a "hands-on" experience by examining over 130 authentic parts and tools. To provide feedback on students' progress, quizzes, homework assignments, and class exercises, are given each day. TDC quizzes and homework are success-oriented exercises. Students gain confidence in their ability to learn the material and takes away the fear of learning. The quiz and homework material is designed to have students pass and learn, not fail and forget!

GD&T: The Common Language

Geometric Dimensioning and Tolerancing (GD&T) is a discipline developed to communicate engineering configuration from the designer to the manufacturer through engineering drawings or models. It is used primarily to alleviate misunderstandings and, thus, provide complete and concise meanings amongst the production team members.

Seeing the value of GD&T, both industry and the Department of Defense has adopted the ASME Y14.5 Dimensioining and Tolerancing standard as the national guide ensuring commonality within the production industry.

A complete understanding of GD&T is vital for tearing down the walls of misunderstanding.

Knowing The Language Is The Key

The American Society of Mechanical Engineers (SME) has been tasked to administer the Y14.5 Dimensioning and Tolerancing standard.  The ASME Y14.5-2009 standard is the most recent revision, replacing the prior ASME Y14.5M-1994 standard.  TDC is committed to helping students learn the GD&T language contained in the Y14.5 standard using a unique blend of lecture, reading/quiz/homework assignments; along with hands-on parts, tools and gages.

Registration Information

The number of attendees to each course is limited and only pre-registered students will be allowed to attend the workshop. Class registrations are made on a first-come, first served basis; send in you registration forms as soon as possible! Workshops tend to fill quickly as the workshop date approaches.  If the class is full, ask to be placed on the waiting list; many times an additional spot will open up prior to the workshop.

When your completed registration form or online registration is received, TDC will send you a confirmation number along with detailed information that includes all workshop details, such as location,  maps, parking directions, lodging information, etc.

Cancellation of registration within 30 days of the first day of class is subject to a 50 percent cancellation fee.  This fee does not apply if the attendee re-schedules to a workshop at a later date.

Pre-registered students who neglect to notify TDC of Arizona, Inc. of their cancellation may be charged full fee. In order to cancel registration, contact TDC for a cancellation number.


Information on recommended lodging will be included with the workshop details.

Register for a Public Workshop

Mail or Fax Your Registration

To attend a Technical Documentation Consultants of Arizona workshop, you may register via the website, mail, or fax. For mail or fax, proceed to the TDC document download space to download the registration form. Complete the registration form and mail or fax the information to the address on the form.

Register Online

To view the current public workshop schedule and to register online, proceed to our online store