Selected Videos

Video material is being used more and more in our teaching of students. The main uses are:

  1. For enhancing the lectures at our Terotechnica Maintenance College.
  2. To provide lecturing material for Dr Coetzee's post graduate lectures, which are progressively refashioned using the Flipped Classroom model. These are performed as part of his work in the Centre for Asset Integrity Management (C-AIM) at the University of Pretoria.
  3. To explain certain difficult concepts to students, who can then view them as much as is necessary.
  4. To document lectures for the use of asset managers and maintainers.

All videos that have been published on YouTube can be viewed by clicking on the following YouTube link. Below are a selection.

Important Note: When viewing these videos, if the quality is not good, please choose a higher quality setting by clicking on the gear symbol on the lower right of the video. On slow connections YouTube autoselects a video setting of 144p, which gives a very poor quality. A setting of 360p or higher should result in good viewing.

1. Potholes and ISO 55000 - People makes the difference

This video documents a presentation that was delivered at the 2017 Annual General Meeting of the Institution of Mechanical and Electrical Engineers of South Africa on 9 March 2017.

2. Renewal Theory Explanation

In understanding the failure of components of technical systems, one has to come to grasp the Renewal Theory. It states that when such a component fails it is typically replaced with a new component and has thus been renewed. This theory can then be used to study the specific component failure situation, with a view towards understanding such failure situation, and deciding whether it might be worthwhile to act preventively by either trying to pre-empt such failure by inspection, or the measurement of some parameter (Condition Based Maintenance), or replacing the component at some age.

This video is aimed at assisting in understanding the Renewal Theory.

3. Does Renewal Deliver?

When using the Renewal Theory discussed above to choose how often to replace a component preventively, and you get to the point when the component should be replaced, maintenance engineers often wonders whether this is such a good idea. The component to be replaced is still running well - does it then make sense to take out a perfectly running component to replace it with a new one? This video is meant to explain why it needs to be done. If done rigorously, such policy will result in substantial overall savings to the business. This policy was after all devised through the Renewal Analysis done, based on real historical failure data of such components.

4. Repairable Systems

Whereas the components of systems are renewed when they fail, the systems of which they are part are mostly only repared minimally when they fail. Your car fails to start, and you replace the battery or have the alternator repaired, or whatever is necessary. But the car is not new after such action. The action taken only ensures that you can keep on using the car. Thus the car is no better that it was before the failure, with the exception of the replaced component. We thus call the car a Repairable System, which can be repaired by replacing individual components, or making adjustments, or any other valid action, but without replacing the whole system. Such system progressively degrades over time in a reliability sense. This video explains the concepts concerning Repairable Systems.

5. Integrated Failure Data Analysis

The problem now arises: we understand that components are typically renewed and that systems are not. We also understand that the methods of analysis for these two are completely different. But many practical situations arises where one wonders which theory applies. You have a water pump in your plant that gives trouble. But the water pump consists of a number of components. Should one now regard the water pump as a system, or as a component? Another example is that of a sub-system. Your car's engine is a complex sub-sustem of the car, which is the system. Which theory now applies to the engine? And, furthermore, what is the relationship between a repairable system and the components of which it consist? This video sheds light on this matter.

 Remember that all videos that have been published on YouTube can be viewed by clicking on the following YouTube link.