Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
This happens when a support department mistakes its responsibility to provide support with a mandate to determine how the thing they are supporting should be done. An example of this sort of mistake would be if the facilities group thought it should determine what facilities we should have. While support departments should know the goals of the people they're supporting and provide feedback regarding possible choices, they are not the ones to determine the vision.