Our latest article, Is Planning Predictive or Persuasive suggests that project controls staff and management place too much emphasis on attempting to develop the ‘perfect plans’ that accurately predicts future outcomes (a passive process that is doomed to failure), and not enough on using the planning and scheduling processes to proactively influence the direction of the project’s future work.
Download Is Planning Predictive or Persuasive from: https://mosaicprojects.com.au/Mag_Articles/AA019_Is_Planning_Predictive_or_Persuasive.pdf
Pat Weaver
Lynda Bourne
Mosaicproject's Blog 
Patrick,
Don’t forget the words of Field Marshal Helmut von Moltke who, in 1865, told us that “no plan survives first contact with the enemy”? Or the words of General Eisenhower who told us in 1950 that “plans are useless, but planning is essential?”
Or one of my favorites from General Omar Bradley: “Amateurs study strategy, professionals study logistics.” (https://build-project-management-competency.com/1-4-1-1-unit-1/ Figure 25)
Speaking as a combat vet, Vietnam class of 1968 – 69, I think we have a lot of PRACTICAL lessons to learn from the military on APPLIED project management, I still can’t imagine why either John Fondahl or the US Navy ended up putting the EDs (Subtrahend) on the TOP and the LDs (Minuend) on the BOTTOM, contravening mathematical conventions. (https://build-project-management-competency.com/1-4-1-9-unit-9/ Figures 71-76)
That is one good question I’ve not been able to answer in my research.