I’ll give an example based on my own experience advising on several large Infrastructure projects over the last decade. It became increasingly obvious to me because my role quickly expanded from an initial difficult problem to solve, into subsequently covering many other problem areas identified by me (and others) that were outside of the contracted scope. Somehow, there were items in the “too hard – its someone else’s’ problem”, or in the completely overlooked basket; or there were “Grey Zone” areas that landed between the scopes of responsibility, such as between Geotechnical and Civil/Structural scopes. Additionally there is a large amount of “relied upon” information that gets passed between each discipline that leads to inefficient designs needing updating, because nobody questioned what they were given soon enough. Everyone is just working inside their silos. What I have found is that for a mega (or any large) project to be successfully delivered, one of the key ingredients is this “intersecting Performance”, because most of the risks (including career and business ending) and opportunities (for increased efficiency and benchmark designs) exists in the gaps or the Grey Zone.