A manager's most important work is helping the people doing the work. Give them a goal and let them work. Remove any impediments that get in their way. Do anything that make them more effective or productive. Then the organization can capitalize on the fruits of their work.
Ken Schwaber, Jeff Sutherland (2012). “Software in 30 Days: How Agile Managers Beat the Odds, Delight Their Customers, And Leave Competitors In the Dust”, p.51, John Wiley & Sons
