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What I Learnt About Operational Excellence from Building Jet Engines at GE by Roman Wroath
GE doesn't just build jet engines—it builds the systems that make building jet engines repeatable, predictable, and profitable. Here's what I learnt about operational excellence from one of the world's most demanding manufacturing environments.
GE Is a Different Animal
The System Behind the Machines
Relentless, disciplined, data-driven operations where everything can be measured and improved
When people hear "GE Aviation," they think jet engines. Massive turbines powering civil and military platforms. Cutting-edge engineering. Precision manufacturing.
All true. But that's not what makes GE special.
What makes GE different is the system. The relentless, disciplined, data-driven approach to every aspect of operations. The expectation that everything can be measured, everything can be improved, and "good enough" is never actually good enough.
I spent seven years inside that system. It changed how I think about manufacturing forever. The lessons I learnt there apply far beyond aerospace—they're universal principles that any manufacturing organisation can adopt to transform their operations.
Lesson 1: Measure Everything That Matters
At GE, we didn't guess. We measured.
Production Metrics
  • Cycle times
  • First-pass yield
  • Machine utilisation
  • WIP levels
Quality Indicators
  • Defect rates
  • Tool wear patterns
  • Operator efficiency
  • Cost per unit
Delivery Performance
  • Lead times
  • On-time delivery
  • Supply chain metrics
  • Customer satisfaction
Every metric had an owner. Every metric had a target. Every deviation triggered root cause analysis.
This sounds obvious, but you'd be amazed how many manufacturers operate on intuition. "We're doing okay." "Things seem fine." "We've always done it this way."
GE taught me that you can't improve what you don't measure. And if you're not measuring it, you're not managing it—you're just hoping.
Lesson 2: Standard Work Isn't Bureaucracy—It's Freedom
Early in my career, I thought standardised work instructions were corporate overhead. Red tape that slowed down skilled craftsmen.
I was wrong.
Standard work is the foundation that makes improvement possible. When everyone performs a task the same way, you can identify which way is best. When there's variation in method, you can't tell whether problems come from the process or the person.
At GE, every operation had documented standard work. Not because we didn't trust our people—because we wanted to capture what our best people did and make it repeatable.

The Irony of Standardisation
Standard work actually increases autonomy. When the baseline is clear, people can see deviations. They can suggest improvements. They can prove that their method is better, then we update the standard for everyone. Without standard work, you just have opinions.
Lesson 3: Problems Are Information
GE's approach to defects and failures was counter-intuitive to me at first.
01
No Blame Culture
When something went wrong, there was no blame. There was curiosity. "Interesting—what does this tell us about the process?"
02
Data-Driven Learning
Every defect was data. Every failure was a learning opportunity. The goal wasn't to punish mistakes; it was to make the system robust enough that mistakes became impossible.
03
Rapid Problem Surfacing
Hiding problems was the cardinal sin. The faster issues surfaced, the faster they got solved. This mindset shift is harder than it sounds.
Most organisations have a blame culture, even if they don't admit it. Something goes wrong, someone gets in trouble, everyone learns to hide problems.
At GE, transparency wasn't just encouraged—it was essential. Problems that remained hidden couldn't be solved. Issues that were raised immediately could be addressed before they compounded.
Lesson 4: The 80/20 of Lean
I earned my Lean Six Sigma Black Belt at GE. I learnt all the tools—DMAIC, value stream mapping, statistical process control, design of experiments.
But here's what took me years to understand: 80% of the value comes from 20% of the tools.
The fancy statistical methods matter for specific problems. But the fundamentals—5S, visual management, standard work, daily accountability—those deliver the bulk of improvement in most operations.
I've seen facilities obsess over Six Sigma statistical analysis whilst their shop floor is chaotic, their work instructions are out of date, and their daily management is non-existent.
The Core Fundamentals
  • 5S workplace organisation
  • Visual management systems
  • Standard work documentation
  • Daily accountability routines
  • Problem escalation processes
Advanced Tools
  • Statistical process control
  • Design of experiments
  • Advanced DMAIC projects
  • Complex data analysis
Fix the basics first. The sophisticated tools come later.
Lesson 5: Suppliers Are Part of Your System
GE taught me that your manufacturing excellence ends where your supply chain begins. If your suppliers are unreliable, your operations will be unreliable—no matter how good your internal processes are.
Partnership Approach
Key suppliers treated as extensions of our facilities
Shared Standards
Same quality expectations and process requirements
Regular Audits
Systematic verification and collaborative improvement
Built-In Quality
Excellence throughout the entire value chain
We treated key suppliers as extensions of our own facilities. Same quality standards. Same process expectations. Regular audits. Collaborative improvement programmes.
This isn't about being demanding for the sake of it. It's about recognising that the final product quality depends on every input along the way. You can't inspect quality in at the end; you have to build it in from the beginning. Every component, every material, every service must meet the same rigorous standards that govern your internal operations.
Lesson 6: Culture Eats Strategy for Breakfast
The most important thing I learnt at GE wasn't a technique. It was a mindset.
Operational excellence isn't a project with a start and end date. It's not a certification you achieve and then move on. It's a way of operating—every day, every decision, every person.
The organisations that achieve lasting improvement are the ones where continuous improvement is woven into the culture. Where asking "how can we do this better?" is reflexive. Where data drives decisions and problems are welcomed as opportunities.
You can teach the tools in a week. Building the culture takes years.
Cultural transformation requires consistent leadership, unwavering commitment to principles, and the patience to let new behaviours become habits. It means celebrating problem identification as much as problem resolution. It means making data-driven decision-making the default, not the exception.
The Culture Equation
Tools + Mindset = Lasting Change
Without the right culture, even the best tools become procedures gathering dust in a filing cabinet.
Applying This to Maritime Manufacturing
When I left GE and entered the maritime sector, I found a different world.
1
What I Found
Small, family-owned yards. Craft-based production. Tribal knowledge. Limited measurement. Minimal standardisation.
2
What I Saw
Immense potential. The same principles that made GE a manufacturing powerhouse apply to building boats.
3
The Opportunity
Operational excellence thinking adapted to the realities of small-batch, high-customisation production.
The fundamental Lean concepts don't care whether you're making turbine blades or hull sections. The physics of flow, the importance of standard work, the power of visual management—these principles are universal.
What maritime manufacturing needs isn't aerospace engineers telling them they're doing everything wrong. It needs operational excellence thinking adapted to the realities of small-batch, high-customisation production.
That's the work I'm focused on now—bringing GE-level operational discipline to an industry that's ready for transformation. The maritime sector has unique challenges, but the fundamental principles of excellence remain constant.
The Five Things I'd Tell My Younger Self
If I could go back to my first day at GE, here's what I'd say:
1. Embrace the Data
Your intuition will often be wrong. Trust the numbers. Data reveals patterns that experience alone cannot see.
2. Standard Work Is Your Friend
It's not bureaucracy—it's the foundation for improvement. Standards create the baseline for innovation.
3. Problems Are Gifts
The earlier they surface, the cheaper they are to fix. Hidden problems compound into crises.
4. Focus on Fundamentals
Master 5S and visual management before worrying about advanced statistics. Basics deliver results.
5. Culture Is Everything
Tools without mindset are just procedures gathering dust. Sustainable change requires belief.
The Bottom Line
GE Aviation gave me more than a job. It gave me a framework for thinking about operations that applies far beyond jet engines.
The specific technical knowledge matters less than the discipline. The willingness to measure, standardise, and continuously improve—that's the transferable skill.
Manufacturing excellence isn't an industry. It's a practice.
The Core Principles
  • Measure what matters
  • Standardise the best methods
  • Embrace problems as information
  • Master the fundamentals first
  • Extend excellence to suppliers
  • Build culture, not just systems
These principles transcend manufacturing type, company size, or product complexity. Whether you're building jet engines, boats, electronics, or furniture, the fundamentals of operational excellence remain constant. The context changes, but the commitment to continuous improvement, data-driven decision-making, and cultural transformation stays the same.
About the Author
Roman Wroath is an engineering management consultant with 14 years of experience in aerospace and maritime manufacturing. He holds a Lean Six Sigma Black Belt from GE Aviation and a First Class Honours in Mechanical Engineering.
Roman specialises in bringing world-class operational excellence practices to manufacturing organisations ready for transformation. His approach combines the rigorous discipline of aerospace manufacturing with practical adaptation to diverse industrial contexts.
Ready to transform your manufacturing operations? Let's discuss how operational excellence principles can drive measurable improvement in your organisation.
Keywords: GE Aviation, manufacturing excellence, Lean Six Sigma, operational excellence, continuous improvement, aerospace manufacturing, process standardisation. Roman Wroath