Who We Are & What We Do

TDP360 LLC is the home of Bryan R. Fischer — advisor, trainer, author, and recognized leader in GD&T, ISO GPS, Model-Based Definition (MBD), Model-Based Enterprise (MBE), tolerance analysis, and product definition practices.

We help companies understand, implement, and optimize these systems across their organization — from engineering and manufacturing to quality and supply chain — ensuring alignment, efficiency, and measurable results.

We are experts in:

  • ASME GD&T (Y14.5) and ISO GPS
  • Model-Based Definition (MBD) and Model-Based Enterprise (MBE)
  • Tolerance analysis
  • Product geometry management
  • Engineering standards

We offer training, auditing, and advisory services in GD&T, ISO GPS, MBD, MBE, tolerance analysis, engineering standards, and related topics.

Link to Books and Articles written by Bryan R. Fischer

Tolerance analysis, tolerance stackup report, "Mechanical Tolerance Stackup and Analysis"
Leading-edge GD&T training material - Positional tolerancing, ASME Y14.5
Leading-edge GD&T training material - Profile of a surface, ASME Y14.5
Model-based definition (MBD), sheet metal part with GD&T sheet 1 of 3, ASME Y14.5, ASME Y14.41, MBE
Model-based definition (MBD), sheet metal part with GD&T sheet 2 of 3, ASME Y14.5, ASME Y14.41, MBE
Model-based definition (MBD), sheet metal part with GD&T sheet 3 of 3, ASME Y14.5, ASME Y14.41, MBE
Model-based definition (MBD), welded assembly (weldment) with GD&T, ASME Y14.5, ASME Y14.41, MBE, ASME Y14.41, MBE
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Training & Advisory Areas

GD&T Training

Build a strong foundation in GD&T principles and ASME Y14.5 standards for accurate and consistent product definition.
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ISO GPS Training

Understand and apply ISO GPS standards to improve global consistency and communication across teams and suppliers.
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Tolerance Analysis Training

Learn how to evaluate variation, predict outcomes, and improve product performance through effective tolerance analysis.
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MBD / MBE Training

Implement model-based workflows and transition from drawings to data-driven product definition.
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Workshops & Presentations

Custom workshops designed to address specific challenges and align teams around best practices.
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Auditing Services

Evaluate your current processes and identify gaps in GD&T, MBD, and product definition practices.
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Advising / Consulting

Get expert guidance on implementing standards, improving workflows, and solving complex challenges.
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Business Process Analysis

Analyze and optimize engineering and product definition processes for efficiency and scalability.
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Why TDP360?

With over 40 years of industrial experience, Bryan R. Fischer brings a unique perspective that spans traditional drawing-based methods through modern model-based workflows. As a trainer, advisor, and author, he has helped organizations around the world improve their engineering practices and product definition strategies.

Bryan is an internationally recognized expert in GD&T, ISO GPS, MBD and MBE, and tolerance analysis. He is a thought leader, author, trainer, developer, and long-term contributor to engineering standards. He has extensive experience working with engineering, manufacturing, assembly, inspection, quality, and supply chains and he has a proven track record helping companies reduce errors, improve efficiency, and avoid costly mistakes.

Contact Bryan
Director of Quality and Quality Manager
Director of Quality and Quality Manager

“Our staff really liked the class. The training addressed issues we face every day. We’ve had other people teach us GD&T with disappointing results, leaving our staff confused and disappointed. This class was by far the best. I wish we had met you sooner. We will be inviting you to return and teach again. Thank you.”

Inspector – attendee GD&T Principles with Client-specific workshop
Inspector - attendee GD&T Principles with Client-specific workshop

“Great course. Discussing our drawings and our GD&T specifications answered a lot of questions.”

Manager – attendee GD&T Principles, GD&T Applications and Tolerance Analysis Courses.
Manager - attendee GD&T Principles, GD&T Applications and Tolerance Analysis Courses.

“I like how Bryan answered our questions by directing us back to the fundamental principles and rules to reinforce our understanding of GD&T”

Engineer – attendee of GD&T Principles, GD&T Applications, and Tolerance Analysis Courses.
Engineer - attendee of GD&T Principles, GD&T Applications, and Tolerance Analysis Courses.

“These were some of the best training courses I’ve ever had.”

Engineer – attendee GD&T Overview Workshop
Engineer - attendee GD&T Overview Workshop

“The training was in-depth. I appreciated that the instructor had examples and answers for all our questions.”

Engineer – attendee GD&T Principles Course
Engineer - attendee GD&T Principles Course

“This was an excellent class. I like how the trainer built the subject from the details and rules up to the complete system.”

Program Manager – responsible for people taking the course
Program Manager - responsible for people taking the course

“Thank you for the class. All the participants had very positive feedback on the training and I think this was really helpful for our program.”

Our Latest Insights

Latest news & insights

Frequently Asked Questions

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What does TDP360 do?

TDP360 is a leading provider of GD&T, ISO GPS, tolerance analysis, MBD, MBE and product geometry management training and consulting services. TDP360 presents GD&T training courses and MBE workshops online and onsite for OEMs, suppliers, government agencies, software companies, and more.

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Who runs TDP360?

Bryan R. Fischer, leading GD&T expert and trainer is president of TDP360 LLC.

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Why should I select TDP360 to provide GD&T training?

In addition to the technical aspects of GD&T, ISO GPS, and MBE, TDP360 focuses on obtaining business value from GD&T, ISO GPS, and MBE. Bryan R. Fischer is a leading GD&T expert and trainer. Bryan has written many GD&T, tolerance analysis, and MBE books. TDP360’s training courses provide unparalleled insight into GD&T, ISO GPS, and MBE.

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Don’t Waste Your Time — Get It Right

Whether you need training, guidance, or help solving a complex challenge, TDP360 can help you move forward with confidence. Whether you need training, guidance, or help solving a complex challenge, TDP360 can help you move forward with confidence.

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