FAQ of Marris Consulting


Welcome to the "Frequently-Asked-Questions" page of Marris Consulting website

This page aims to answer the questions we are most frequently asked about the different areas of expertise of Marris Consulting:

  • Marris consulting in general
  • The Theory of Constraints in production
  • Critical Chain Project Management
  • Lean



What is Theory of Constraints?

The Theory of Constraints (TOC) is a productivity improvement methodology that emphasizes the importance of identifying the primary limiting factor (i.e., the constraint, or bottleneck in manufacturing). Learn More.

What is Critical Chain Project Management?

Critical Chain Project Management (CCPM) is a project management methodology that focuses on the resources required to execute project tasks, and on the consumption of a protection called buffer at the end of the project. The main indicator used to monitor the project is the Fever Chart. CCPM aims to finish projects on time. Learn More.

How to implement Critical Chain Project Management?

Critical Chain Project Management is a project management method that requires following a precise sequence of steps to be effective. Discover the 6 necessary steps to implement CCPM with Marris Consulting. Learn more.

How to implement the Theory of Constraints?

The Theory of Constraints (TOC) provides a specific methodology for identifying and eliminating bottlenecks, referred to as the Five Focusing Steps. Learn more.

How does Theory of Constraints compare to Lean ?

The Theory of Constraints and Lean are two of the main approaches to improve the performance of industrial organizations. How do they compare? Can they be combined? Our point of view regarding ToC and Lean. Learn more.


When TOC is pertinent?

The Theory of Constraints (TOC) has proven its pertinence across diverse industries and contexts. Understanding when TOC is pertinent requires a closer look at its key principles and the scenarios where its application yields significant benefits

Learn more. 

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