He doesn’t get to walk away after he’s identified a good solution. His role changes now, and he’s a bit more like a director in a movie. He’s got to be there as every scene is shot. And he’s got to decide which scenes should be shot first, and which scenes get shot last. He knows that in the end the entire movie needs to come together and look like one coherent whole.
I like the analogy to a movie director for the work that happens during the delivery phase.
