>> Ensure the task is understood, supervised, and accomplished

This might be a good idea for running a military unit but fails miserably in IT. As a leader I hardly ever supervise my engineers, they have to understand the tasks and only come to me if there something that they do not understand. Giving them as much freedom as possible is one reason they like to work with us, feedback we got from 90% of them. Sometimes if the task is impossible to be done we expect them to come back, explain why and also provide an alternative. This happens a lot too.