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DfMA & GD&T Expert

Right design.
First time.

80% of engineering changes are preventable at the design stage. With 18+ years in high-tech industry (since 2008), I help engineers and teams eliminate costly redesigns before they happen.

Trusted by
Fırat Büyükcivelek speaking at Precision Fair
Fırat Büyükcivelek
M.Sc. Mechanical Engineer
Trainer · Coach
Since
2008
in high-tech industry
300+
engineers trained
3
countries active training
∞
design errors prevented
DfMA GD&T DfX ASME Y14.5 ISO GPS ISO 1101 ISO 5459
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Services

What do you need?

From individual engineers to corporate teams — a program tailored to your level and goals.

⚙️
DfMA Training

Design for Manufacture and Assembly. Closes the most critical knowledge gap in the design process.

  • Manufacturing techniques & process limits
  • Material selection & production cost
  • Part consolidation strategies
  • Real-world industry case studies
Learn more →
📐
GD&T Training

Geometric Dimensioning & Tolerancing. Translate ISO & ASME standards into daily engineering practice.

  • ISO 5459 — Datums & datum systems
  • Form, orientation & position tolerances
  • PMI & model-based definition
  • Tolerance stack-up analysis
Learn more →
🎓
Coaching & Sessions

Walk-in Q&A sessions and focused masterclasses. Ask your questions, review your drawings, deepen your knowledge.

  • Walk-in sessions — open Q&A, max 3 people
  • Masterclass — focused deep dive per topic
  • 1:1 coaching — tailored to your design challenges
  • 20% member discount for newsletter subscribers
View sessions →
2026 Service Overview
GD&T & DfMA Booklet.

Full overview of training programmes, coaching options, and approach. Download the PDF to share with your team or manager.

📄 Download Booklet PDF →
Live Sessions

Learn with Fırat.

Join a weekly walk-in Q&A session, or come meet in person at an upcoming event.

Weekly · Every Wednesday · On Request
Walk-In Q&A Session
1 hour · max 3 participants · Microsoft Teams
  • Bring your GD&T or DfMA question, drawing, or design challenge
  • Real-time expert feedback from 18+ years in precision engineering
  • Small group — maximum 3 participants, so everyone gets time
  • No preparation needed — just show up with your question
  • Suitable for all levels: junior engineer to senior designer
Interested? Get in Touch →
Upcoming Events
What's next

What engineers say.

300+
engineers trained
70+
written testimonials
94%
would recommend

"DfMA training built a multidisciplinary foundation and provided intensive knowledge on design perspective and productisation. A training every mechanical design engineer should take at the start of their career."

EA
E. Ateş
Design Engineer

"Training was full of knowledge about design principles, manufacturability and manufacturing processes. Despite my manufacturing background, it was very useful to revise and deepen my knowledge."

İE
İ. Erden
Senior Mechanical Designer

"As an ASML design engineer I'm very happy with the existence of a DfM competence with Fırat as lead. His useful knowledge during several presentations already stood out from the rest."

PD
P. Daamen
ASML Design Engineer

"Hands down, one of the best courses you can attend as a Mechanical Design Engineer. A unique training combining theoretical studies with real experience from high-tech companies."

EÖ
E. Özgüven
Mechanical Design Engineer

"The training was incredibly valuable. Fırat did an excellent job covering key principles to optimise product design for efficient manufacturing and assembly."

OŞ
O. Şen
Price & Cost Analysis Engineer

"As a recent graduate, this was incredibly educational. Hearing real examples from Fırat's professional experience elevated the training significantly. Very happy to have met him."

KS
Kubilay S.
Mechanical Design Engineer

Scroll to see 70+ testimonials · See all on LinkedIn

Latest insight.

Follow on LinkedIn →
GD&T Insights — Most Common Mistakes Series May 2026

The datum on the centerline

Engineers place a datum triangle on a centerline. They think they are referencing the axis.

Well.. They are not.

A centerline is not a feature. You cannot touch it. You cannot clamp anything to it. You cannot probe it.

See the image. Datum E. On the centerline. Three slots share that line. Which one defines the datum? The left? The centre? The right?

Nobody knows. Different inspectors. Different fixtures. Different answers. Your part passes inspection and still does not fit.

Read full post on LinkedIn →
Engineering drawing showing datum E incorrectly on centerline vs datum A correctly on feature of size
Archive

All articles.

GD&T Datums According to ISO 5459: From Definitions to Practice Feb 2026 → Event Precision Fair 2025 — GD&T Masterclass & MBD Presentation Jan 2026 → DfMA Bridging Theory and Practice in DfMA Jan 2026 → DfMA Early Supplier Engagement: Why It Matters Feb 2025 → Materials From Tradition to Innovation: Polymers in Engineering Jan 2025 → GD&T GD&T Common Errors #1: Overly Strict Tolerances 2024 → GD&T · DfMA Advanced Engineering and Tight Tolerances: Do They Guarantee Good Design? 2024 → GD&T · History René Descartes, La Géométrie and Coordinate-Based Tolerancing Feb 2024 → Industry Manufacturing Industry and Economy: Why It Matters for Engineers Feb 2024 → DfX What are DfX and DfMA? 2024 →
Let's Talk

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Whether you're an individual engineer looking to level up, or a company wanting to systematise DfMA — book a free 30-minute call and let's figure out the best path together.

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