Philip Marris, founder and CEO of Marris Consulting

Home>Who are we?>The founder

Philip Marris, Founder and CEO of Marris Consulting – Expert in boosting operational performance, the Theory Of Constraints and Lean


Philip Marris has been successfully implementing the Theory Of Constraints combined with Lean for over 30 years in over 300 organisations worldwide. His principal skills are operational performance and project management. He is English but based in Paris, France. He is bilingual English/French.

Starting in 1986 he worked with Eliyahu Goldratt the founder of the Theory Of Constraints (TOC) and the author of the international best-seller The Goal and many other books.

He is the author of a very successful book in French Le management par les contraintes that describes how to implement TOC in factories; how to implement the ideas in the “business novel” The Goal.

He managed for many years the consulting business in the manufacturing and process industries of the largest French firms in this domain: Bossard Consultants and Cap Gemini Ernst & Young,

  • Cap Sogeti Industrie: Senior Consultant

  • Bossard Consultants / Gemini Consulting: Principal, in charge Manufacturing and Process Industries for France (75 consultants) and the European network (200 consultants).

He is the founder and CEO of Marris Consulting, founded in 2005 and based in Paris, France. He has worked all over the world (over 30 countries). Among his clients are: Air France, ArcelorMittal, Areva, Autoliv, Bayer, Bolloré, Bosch, Embraer, Essilor, GSK, Infineon, Ipsen, Jaeger LeCoultre, Lilly, Louis Vuitton, McDonald’s, Naval Group, Novartis, Pierre Fabre, Procter & Gamble, Nexter, Rolex, Safran, Saint-Gobain, Sanden, Schlumberger, Siemens, SKF, Thales, Valeo, Yves Rocher & Zodiac Aerospace. Half of Marris Consulting’s business is outside of France.

He actively contributes to the awareness of the Theory Of Constraints throughout the world: dozens of conferences every year, numerous articles, hundreds of videos …

He regularly hosts public and in-house training sessions on the Theory Of Constraints, Lean Manufacturing, TOC project management approach (Critical Chain Project Management), Lean Engineering …

He is currently writing a new edition of his book.

Our training       Our case studies     Our conferences        Our Youtube channel 

Photo Portrait de Philip Marris

Couvertures des livres de Philip Marris


Follow Philip Marris on Twitter:


About Marris Consulting

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.

Social networks



Our newsletter


Tour Maine Montparnasse, 27éme étage
33, avenue du Maine - 75755 PARIS cedex 15

Tel. : +33 (0)1 71 19 90 40

Contact us via our form


Who are we ?


Legal Notice

Site map