What makes a great boss? Bosses don't become great because of their title, rank, degree of authority, office size, or benefits package. Great bosses aren't even necessarily great managers. Instead, they possess a set of core competencies that set them apart from mere managers. The skill set of great bosses entails five qualities: they do the right thing for the right reason; they never make the same mistake twice; they set their personal expectations higher than those of their bosses; they go to their bosses with action plans, not problems; and they follow up.

If a boss has only one of...