Basics and principles – TO BANAL AND UNDERSTANDED TO DO IT?

SAP projects often go into difficulties because not all necessary questions have been answered in full beforehand and have been clearly and amicably documented with all partners (especially system integrators) and stakeholders (stakeholders).
The following questions need to be answered:
– What is to be achieved? (Project objectives in all aspects)
– How is this to be achieved? (Project implementation in all aspects)
– How is it ensured that the correct result is achieved? (project controls)
I am aware that these are very banal questions and that their prior answer should be a matter of course. But apparently it’s not. At least I have never encountered anything like this in a project that I had taken over and not set up myself. Quite the opposite: Not too long ago I took on a project that was set up by three experienced project managers (in total > 50 years of experience). The project objective communicated to me was: “We want to introduce SAP”. But nowhere was it described how this was to be done! So for two years a small army of SAP consultants had done something hardly comprehensible, which logically had nothing to do with meaningful goal achievement.