Vicky Mabin presents the Conditional Reality Tree

The Conditional Reality Tree, a new tool of the Theory Of Constraints' thinking process


At the annual TOCICO (Theory Of Constraints International Certification Organization) conference in 2023, Philip Marris interviewed Vicky Mabin about a new tree that has been developed by one of his PhD students, Dr. Abeer Youssef, in close collaboration with her.

It occurred to them that none of the existing trees could describe what might happen or worsen over time when something is about to happen but no action is taken timely.

It differs from present and future reality trees in that it starts from assumptions or conditions that have not yet occurred, and shows a reality that is likely to happen if these conditions do occur, but does not represent a desired situation.



To enhance your expertise, Marris Consulting organizes training sessions on Theory Of Constraints applied to production and projects environments



Marris Consulting, expert in Theory of Constraints & Critical Chain Project Management


Marris Consulting is an expert in the Theory of Constraints (ToC) and Critical Chain Project Management (CCPM). As industry consultants, we are focused on helping process and manufacturing industries reach their highest levels of performance by using Constraints Management  combined with Lean and Six Sigma. We also use Critical Chain Project Management which we sometimes combine with Lean engineering to improve project performance. If you are unsure about the actions which need to be implemented to improve operational efficiency, our industrial management consultants can also conduct a performance audit. Furthermore, our experts host numerous Theory of Constraints (ToC), lean and project management training sessions throughout the year.

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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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