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Critical Chain Webinar

Efrat Goldratt-Ashlag's Rules of Flow



Discover Critical Chain Project Management revisited: Efrat Goldratt-Ashlag's Rules of Flow.

Rules of Flow

Date & Registration

  • Tuesday 04th of July 2023, in English

  • Webinar from 12:00pm to 1:00pm Paris time (CEST), 40 mins of presentation followed by a 20-minute Q&A session


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Webinar material


The replay will soon be available

About the conference


Critical Chain Project Management, developed by Eliyahu Goldratt, is widely used by numerous organizations worldwide, including Mazda Motors, Embraer, and the United States Air Force. The results achieved through this approach are remarkable, with a majority of implementations reducing project durations by half. It enables projects to meet deadlines and doubles the productivity of individuals involved in the work.

In 1997, Eliyahu Goldratt published the novel "Critical Chain," which explains this method through a business story, similar to his worldwide bestseller "The Goal." Although he passed away in 2011, his daughter now revisits the subject, incorporating lessons learned over the past two decades. Initially, the justification for Critical Chain (hence its name) was based on an analysis of task duration variability, seen as the primary hindrance to project management performance.


The proposed "solution" involved using optimistic estimates for tasks and incorporating buffers for projects. However, it was later discovered that "bad multitasking" was actually the main cause of problems in most project environments. These insights gradually led to the development of "Rules of Flow" applied to projects.

In this new approach to project management based on the Theory of Constraints, Efrat Goldratt-Ashlag presents eight rules of flow. However, she emphasizes in this webinar that these rules should not be seen as a strict recipe or a fixed set of guidelines to follow. Instead, they represent a list of potential rules that each organization can use as inspiration based on its specific environment.


Efrat explains the usefulness of this list but also highlights that the hierarchy and sequence of implementation depend on the specific issues encountered in different project environments, which vary greatly.

During this webinar, Efrat describes the most important rules of flow while sharing numerous anecdotes about the emergence of Critical Chain and the challenges and frustrations faced by her father, Dr. Eliyahu Goldratt, who conceived this revolutionary project management method and improved it through feedback and practical implementations.


The conclusion of the webinar was dedicated to a question-and-answer session.

About the speakers

Efrat Goldratt

About Efrat Goldratt-Ashlag


Efrat Goldratt-Ashlag is the daughter of Dr. Eliyahu Goldratt, the author of “The Goal” and the founder of the Theory Of Constraints. She has been part of his inner circle.


In January 2023 she published “Goldratt’s Rules of Flow”. It is already the book recommended as the first step in your Critical Chain Project Management journey. But it is also a book that has quickly amassed critical acclaim from the seasoned professionals who have been implementing this approach over the past 20 years. So it is also highly recommended whatever your knowledge of this way of managing projects.


She is also the co-author of Dr. Eliyahu Goldratt life philosophy book “The Choice”. She manages his copyrights and publications around the world. She holds a PhD. in Organizational Psychology and specializes in developing training materials that enable personal and organizational growth.

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 usually 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 280 times in over 30 countries. His clients include: Air France, ArcelorMittal, Ariane Group, Embraer, GSK, McDonald's, Procter & Gamble, Qiagen, Safran, Salzgitter-Mannesmann, Siemens, SKF, Thales and Zodiac Aerospace.