Rule #12: Infoflow up

Unwritten Rule of Engineering #12: One of the first things you owe your supervisor is to keep him or her informed of all significant developments.

Bear in mind that your manager is constantly called upon to account for, defend, and explain your activities to others, as well as to coordinate these activities into a larger plan. Compel yourself to provide all the information that is needed for these purposes. … No manager [likes] being surprised …