Webinar - Theory of Constraints + Lean - a winning combination

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By focusing Lean initiatives in the right places within the company the Theory Of Constraints leads to much faster improvements in performance. By identifying what limits sales, TOC enables organizations to renew with growth and avoid downsizing. You could call it focused Lean.

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Dates & Information


Thursday 25th of March 2021, 4:00pm to 5:30pm (Paris time).

Online webinar, in French.

Free event.

Registration for this webinar are no longer available

The Theory Of Constraints (TOC)

The main approaches to improve the performance of industrial organizations are Lean, Six Sigma and the Theory of Constraints. TOC is the least well known and the least used. It is sometimes referred to as Constraints Management. This school of thought was developed by Eliyahu Goldratt in the 70's and became known in particular through a worldwide bestseller novel – The Goal– that has been sold over 7 million copies in 29 languages. It assumes that all plants are now unbalanced, the workload is unevenly distributed. At any time there are overloaded resources – bottlenecks or constraints – and "non-bottlenecks”. Management rules must be redesigned accordingly.

Lean or Toyota’s way

To avoid confusion we consider here that "Lean" is the approach developed by Toyota. It is a long term process of eliminating waste, a process of continuous improvement implemented by all employees. It seeks to continuously, uncompromisingly, improve products flow. The Lean manufacturing system is now quite well understood, very frequently identified as a goal…and sometimes quite well copied. We believe that it is unfortunate that in the majority of cases Toyota’s R&D and new product development system is not also copied since it is a very important component of the Toyota “model”, people buy their cars as much for the way they are designed as for the way they were built. What is most disturbing is that when the ex-first world copies Toyota, it nearly always leads to a process of continuous downsizing whereas Toyota is a growth and full employment model. We call this company contraction “improvement process” laced with Japanese words “Bad Lean”.

TOC + Lean: winning combination

When Lean and Theory Of Constraints are combined, improvements are much faster and significant increases in sales are frequently observed. Lean drives out wastes and TOC identifies constraints on which to act to increase turnover. The combination of the two creates a virtuous circle whereby the company becomes continuously more effective by eliminating the added expenses, and simultaneously generates additional sales that can absorb the productivity improvements.


About Philip Marris


Philip started his Theory Of Constraints journey in 1986 when he joined Creative Output and worked with Eliyahu Goldratt, the founder of TOC and author of the worldwide bestseller “The Goal”. In 1994 he wrote a bestselling TOC textbook in French.
He is also a recognized Lean expert and combines Lean (Manufacturing/Engineering/Management) with TOC. He founded Marris Consulting based in Paris France in 2005.
Half their business is outside of France in Europe and the rest of the world. He is bilingual and bi-cultural French/English. He is very active in the TOC community. He has implemented TOC over 270 times in over 30 countries. His clients include: Air France, ArcelorMittal, Ariane Group, Embraer, GSK, McDonald's, Louis Vuitton, Procter & Gamble, Safran, Salzgitter-Mannesmann, Siemens, SKF, Thales and Zodiac Aerospace.

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.

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