Before launching into change, when you spell out how wonderful the new world is going to be, make sure you know where you are.
Critically important is a complete understanding of where you are, and every facet of where you are now that could be affected by your change. Change often comes with a business case. The business case will spell out why making the change is worthwhile.
The problem with business cases is that they normally focus entirely on B, or your end point, and make little allowance for, or have much of a basis in, something much more important and much more real.
Where you are is as important as knowing where you want to be. Imagine agreeing how long it would take to get to a destination ...