"Sometimes an answer/approach/tactic is not enough. It's best to explain the question before requesting execution of the resolution..."
So said me at a meeting last week. At which point I was shouted down and told the deadline was too tight for discussion and we had to get 'er done!
Which is ok - because we can ask the questions while executing. Iterative approach and discussion do not mean waiting unless we have mapped all the routes before we start the journey.
It's just never ok to not ask questions and clarify the problem we're trying to solve - at any stage!