You could probably get 1000 different answers to this.
At the end of the day, it comes down to how the course is to be presented and how the membership want it to play. There is no set rule of what heights of cut should be where. A lot of courses now have done away with intermediate cuts around fways and greens and we are seeing more collars going away too. I've seen it all from 4 steps (green, 24" collar, 36" intermediate, 3" rough) to greens height right to whispy thick fine fescue. There is also the benefit of the less step cuts, the less labor is needed.