The Critical Chain in MRO to reduce downtime

Discover the application of the Critical Chain method in the MRO (Maintenance, Repair & Overhaul) field


Christian Schan, Senior Consultant  at Marris Consulting, explains to us the application of this method which he has implemented numerous times.

This approach recognizes and accepts uncertainty, variability and unforeseen circumstances during project execution. Managing the maintenance of a plane, a train or even a boat can be compared to managing a project since the maintenance of equipment is made up of a set of tasks to be carried out which can considerably vary depending on the obsolescence of the means of transport, flight or traffic conditions for example.



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


Critical chain project management training

In maintenance centers, it is therefore necessary to identify the root causes of common problems, such as lack of resources, lack of parts, or lack of available locations. You must then propose an action plan to resolve them and define a schedule accordingly.


Scheduling tasks early in the maintenance process is crucial to reducing the risk of “Findings”, i.e. reducing the risk of discovering unforeseen work later in the maintenance visit. In this type of activity where every minute counts, the objective is to advance the milestone where all of the risk areas have been inspected as early as possible during the visit.


The Critical Chain applied in the MRO world is based on 4 key points:

  • Dynamic scheduling by the Critical Chain
  • Outstanding management
  • The dosing principle
  • The Full Kit concept

These principles do not only apply to aeronautical maintenance, they are adapted to maintenance operations in the broad sense, and in different sectors (railway, naval). Their application allows you to quickly obtain tangible results.

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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