Marris Consulting, a company focused on improving sustainably
the performance of manufacturing and process industries

We have over 25 years of experience of combining the Theory Of Constraints (TOC) with Lean to go faster and further: 1 + 1 = 3

We help our clients reach and maintain ambitious levels of performance by combining actions on processes, organization, methodologies, tools … and people from the shop floor to the board room.

We are recognized experts in Constraints Management. We promote an integrated approach that combines Theory Of Constraints (TOC) to identify where to act and Lean and Six Sigma to improve performance.

We also use TOC's Critical Chain Project Management (CCPM) approach to boost project performance especially for New Product Development portfolios. We sometimes combine this with Lean Engineering (a.k.a Toyota New Product Development System).

Nouveaux locaux

Critical Chain Project Management training in French - may & october 2015

Do you dare finish your projects on time, within budget and with full initial scope!

To understand how the project component of the Theory Of Constraints can transform your project design and execution (New Product Development, Engineering, Construction ...). -40% project duration reductions, +50% increase in productivity ... Presented by Philip Marris and Eric Robin CCPM expert.

Details and registration : Critical Chain Training in French (Fr)

Visit our Marris Consulting Channel on YouTube

Discover all Marris Consulting videos on Theory of Constraints in production, project management, also the combination TOC & LEAN .... and many other topics on our Channel.

To visit Marris Consulting Channel

Philip Marris talks about Theory of Constraints

Interviewed by Bill Dettmer - 17 minutes

Interviewed by Bill Dettmer, Philip Marris shares his experience on Theory of Constraints and crucial steps to remember when setting up the methodology

To view video

TOC + Lean workshop in French or English - Paris November 2015

Using the Theory Of Constraints to boost your Lean programme

To better understand how Constraints Management can greatly improve your operational and financial performance and how to integrate this approach into a Lean program. This is the 5th repeat session of this popular event. It will be presented by Philip Marris a recognized expert of TOC and Lean.

Details and registration: Constraints Management


With our extensive experience of different industrial sectors and our expertise in change management we assist companies in all their departments especially: Manufacturing, Supply Chain, R&D and Industrialization, Marketing & Sales …

To follow us :

Project Focus

A Lean + TOC (Theory Of Constraints) mission

Discover how Marris Consulting helped a Mexican automotive equipment supplier factory. Results: increased productivity by over 20% and Premium Freight costs reduced by a factor of 10.

Tools Focus


A presentation of the Failure Modes and Effects Analysis methodology that facilitates the identification of the causes and their importance  for both products and processes.

Book recommendation

"Be Fast ou Be Gone"  by Andreas Scherer.
This business novel explains how to implement Critical Chain Project Management (CCPM - the project component of the Theory Of Constraints) and the results that can be obtained.

Video of the month

Clarke Ching "Rolling Rocks Downhill" book writing saga
Clarke Ching tells the story of the 11 years it took him to write his business novel “Rolling Rocks Downhill”. His MBA thesis on how and why to combine Agile and TOC


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