Authors:

Once a year ask the boss, "What do I or my people do that helps you to do your job?" and "What do I or my people do that hampers you?"

"Managing for the Future: The 1990's and Beyond". Book by Peter F. Drucker, 1992.
Once a year ask the boss, What do I or my people do that helps you to do your job? and What do I or my people do that hampers you?