Marris Consulting

Marris Consulting We apply Theory Of Constraints (TOC) + Lean. Marris Consulting is 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 a

pproach 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 and Process Development System). 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 …

Marris Consulting has reached 660 videos and 820,000 views on our YouTube channel.The videos are mostly about the Theory...
03/09/2026

Marris Consulting has reached 660 videos and 820,000 views on our YouTube channel.

The videos are mostly about the Theory Of Constraints, Critical Chain Project Management, and the Thinking Process. There are also many videos about Lean including our series with an ex-VP of Toyota Motor Manufacturing. We are especially proud of the over 100 client testimonials. You will also find over 100 interviews of experts. + Many tutorials. Dozens of conference recordings. Etc. Etc.

14 years of hard work. Thank you to all the team and thank you to all the people who accepted to contribute. We aim to publish one new video per week. Please do subscribe to the channel if these subjects interest you.

https://www.youtube.com/

01/09/2026

Battez-vous pour vendre plus !

🎯 Lors d’un entretien, MrBeast (YouTuber  #1 mondial) explique comment il applique les principes de la Théorie des Contr...
30/08/2026

🎯 Lors d’un entretien, MrBeast (YouTuber #1 mondial) explique comment il applique les principes de la Théorie des Contraintes, popularisés par le livre "Le But" de Eliyahu M. Goldratt.

👉 Son point clé : le goulot d’étranglement.

Selon lui, la performance d’un système ne dépend pas de l’ensemble des efforts fournis, mais de son maillon le plus faible — l’étape la plus lente ou la plus limitante.

Pour illustrer son application, il utilise une image : celle d'un tuyau d’arrosage, Il suffit qu’une seule section soit comprimée pour que tout le flux soit ralenti, voire bloqué.

💡 Dans son entreprise, cela se traduit :
- Chaque membre de l’équipe doit être capable d’identifier les points de blocage et de contribuer activement à leur résolution, plutôt que de travailler de manière isolée ou en silo.

- Il va même plus loin : Il impose la lecture de ce livre à ses équipes pour créer un langage commun et aligner tout le monde sur cette logique d’optimisation.

Lien vers la vidéo (en anglais) dans le premier commentaire.

{hashtag| #|The_Goal} {hashtag| #|Théorie_des_Contraintes}

Are you making strategic decisions based solely on accounting data? It may be time to reconsider. Traditional accounting...
29/08/2026

Are you making strategic decisions based solely on accounting data? It may be time to reconsider. Traditional accounting provides a standardized approach to presenting results to investors and governments, but it often fails to consider crucial factors that can impact a company's success.

Take, for instance, one of our customers in the manufacturing industry. Despite having cutting-edge technology, they were unable to increase production due to their reluctance to invest in additional workforce. Expensive machines sat idle, waiting for operators, and the company missed out on potential revenue. This is just one example of how accounting data alone can be misleading.

Another common example is the cost of R&D. While not profitable in the short term, research and development is critical for a company's long-term success. As Eliyahu Goldratt famously said, a company's goal is to "make money now and in the future." Without R&D, a company risks being left behind by competitors and ultimately failing.

I've seen this happen to industry leaders who failed to invest enough in new product development. They eventually fell behind their competitors and struggled to catch up.

So next time you're making strategic decisions, consider the bigger picture beyond just accounting data. It could be the key to your company's long-term success.

28/08/2026

Le livre : Les Règles de Flux. Les principes du But appliqués aux projets de Efrat Goldratt-Ashlag.

Have you taken the quiz on the Theory of Constraints in Production? https://www.marris-consulting.com/en/theory-of-const...
27/08/2026

Have you taken the quiz on the Theory of Constraints in Production?
https://www.marris-consulting.com/en/theory-of-constraints-quiz

Just 10 multiple choice questions with explanations of the answers

If you are familiar with "The Goal" by Eliyahu M. Goldratt, you should find most of the quiz questions within reach. But do not just aim for the correct answers—make sure you are integrating these principles into your organization's practices.

And if you are not applying these concepts yet, what steps can you take to transition from theoretical knowledge to practical implementation of Eliyahu Goldratt's teachings?

How many points did you score?

26/08/2026

Operational Excellence in the Food Industry. A few comments by Philip Marris.

Companies have the multiskilling they deserve!I have made many industrial visits to my customers in recent months and I ...
25/08/2026

Companies have the multiskilling they deserve!
I have made many industrial visits to my customers in recent months and I am always surprised by this observation.

In a small business with 150 employees, the operators are all capable of operating 3 to 5 different machines.

Across the street or in the next town, in a large company that manufactures very similar products, this is totally impossible.

My contacts explain that it is because the start button is not exactly in the same place, that the manufacturing process is not 100% identical, or that the procedure to follow has specifications.
Or that Marc is authorized to use the RT-5050 but not its cousin, the RT-5040.

After having accompanied many companies, I am no longer convinced by these arguments.
In reality, there are managerial shortcomings in these structures: they prefer to leave things as they are rather than try to change the lines. They let themselves be overwhelmed by procedures that are sometimes very heavy, they don't regularly follow up on operators' training plans, they refuse to "waste" time training someone, etc.

However, when I go to see Marc, I often learn that he has wanted to go on something new and develop new skills for many years.

My advice is then the following: work on your multiskilling! The benefits will be instantaneous.
More generally, remember to train your operators continuously. Otherwise, you may find one day that your last operator who knows how to do an operation has left and that no one else has the skills in-house!

Image credit: The Goal graphic edition (text modified).

24/08/2026

Excellence Opérationelle dans les entreprises de services. Témoignage du Cabinet Roux, activité assurance.

A Nobel prize talking about bottlenecks and sifting information out of an ocean of data:In his book “The Sciences of the...
23/08/2026

A Nobel prize talking about bottlenecks and sifting information out of an ocean of data:

In his book “The Sciences of the Artificial” (1969), Herbert Simon shares an example of bottleneck identification and how to take them into consideration when designing a system. 👇

Printing capacity was a bottleneck: The State Department had to cope with overloaded teletypes and incoming communication lines --> the capacity was increased thanks to line printers --> but the new bottleneck was the capacity of officers to analyze the information --> the real bottleneck was management attention.

This example puts forward the real question: how to filter information and provide decision-makers with relevant information instead of just increasing the flow of data.

“A second example illustrates the importance, in choosing a representation for a design problem, of identifying correctly the limiting resource or resources. A few years ago, the State Department was troubled by the congestion that affected its incoming communication lines whenever there was a crisis abroad. The teletypes, unable to output messages as rapidly as they were received, would fall many hours behind. Important messages to Washington were seriously delayed in transmission. Since printing capacity was identified as the limiting factor, it was proposed to remedy the situation by substituting line printers for the teletypes, thereby increasing output by several orders of magnitude. No one asked about the next link in the chain: the capacity of officers at the country desks to process the messages that would come off the line printers. A deeper analysis would have shown that the real bottleneck in the process was the time and attention of the human decision makers who had to use the incoming information. Identification of the bottleneck would have generated in turn a more sophisticated design problem: How can incoming messages during a crisis be filtered in such a way that important information will have priority and will come to the attention of the decision makers, while unimportant information will be shunted aside until the crisis is past? Stated in this way, the design problem is not an easy one, but if a solution is found, even a partial one, it will at least tend to alleviate the real problem instead of aggravating it.”

This paragraph strongly resonates with Goldratt’s book “The Haystack Syndrome”.

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