The bones of the dinosaur.

While in the early stages of my career, as part of a team of psychologists looking after the well-being of the members of the Police Service, I learned that changing systems and structures in the organisation is like turning a freight ship in a tropical storm or servicing a Boeing in mid-flight, to say the least a very difficult and complicated task.  But if you start with one worker-ant at a time, giving the ant the support and guidance needed, over time the positive outcome will infiltrate the structure and the systems.
Structures and systems in the organisation are the bones of the dinosaur. You have to build them up and strengthen them from the inside out.