It's good to delegate duty to subordinates.
Mike is the managing team leader of a group and has just been given an extremely important assignment to complete.
Mike wants to make sure the assignment is completed to exacting standards.
Mike divides the assignment among the team members and monitors their work closely.
Mike does the work on his own because he doesn't want his subordinates messing it up.
Mike's team is productive and learn some new skills on the assignment.
Mike's team have free time at work that is now being wasted.