Theory of Constraints, Critical Chain Project Management, Lean : industry consulting & training - Marris Consulting
Many project-driven organizations adopt Agile hoping for faster delivery and empowered teams — but often find those benefits elusive in complex environments like R&D, IT, and engineering.
The issue isn’t with Agile itself, but with the unchanged system around it: shared resources, overloaded portfolios, and coordination bottlenecks that Agile alone can’t fix.
This short webinar cuts through the noise. You’ll learn how to apply proven delivery principles from Agile, Lean, and the Theory of Constraints to improve flow, reduce friction, and deliver more consistently — across projects, teams, and functions.
Webinar on Thursday 4th of September 2025
Free online conference, in English
Watch the replay of the webinar
Why so many projects stall — and how to fix the organizational root causes
How to use Rules of Flow and Critical Chain thinking to manage bottlenecks in multi-project settings
How to scale Agile without heavyweight frameworks — by focusing on flow and constraints
What leaders can do to reduce overload, stabilize priorities, and enable faster delivery with fewer firefights
If you lead a PMO, R&D group, product function, or program delivery, this session gives you practical, system-level tools to improve delivery — not by working harder, but by working smarter.


Etienne Lecerf is Managing Consultant at Marris Consulting, based in Paris, and has been working alongside Philip Marris for over ten years.
Drawing on the Theory of Constraints, Lean, and industrial engineering, he has led numerous transformation projects in both project-driven and manufacturing environments, in France and internationally — including Saudi Arabia, Spain, Poland, Mexico, the United Kingdom, the Czech Republic, Germany, and Burkina Faso.
A graduate in industrial and mechanical engineering from Arts et Métiers ParisTech, he has supported leading industrial companies in improving their operational performance.
He has broad experience across various contexts, including:
New product development
Engineer-to-order design
Industrial production
Aerospace maintenance
His work spans a wide range of industries such as aerospace, oil & gas, medical devices, software development and IT integration, Defence, rail transport, mining, and more...
To know more about Critical Chain
Marris Consulting is an industry consulting and training company specialized in the Theory of Constraints (ToC) and Critical Chain Project Management. We focus on improving the performance of manufacturing and process industries by using Constraints Management combined with Lean and Six Sigma. To boost project performance, we also use Critical Chain Project Management (CCPM), which we sometimes combine with Lean Engineering. Our 2-day performance audits, our performance consulting services and our project management, Lean, ToC & CCPM training by our industry consultants offer a wide range of solutions to help our clients around the world reach the highest possible levels of performance.