One of the most startling things about Project Management is that it demands complete honesty and sensitive diplomacy – both at the same time, and from the same person: The Project Manager.
This refers, of course, to Project Management properly executed, not the inexact and ineffective performance we often see around us in the name of our distinctive art/science.
First, the complete honesty part. What is the most common flaw of damaged projects? Failure of clear understanding, agreement and follow-through on the responsibilities of the various stakeholders. This cripples projects. If they are to succeed, everyone involved must be clear on what is expected, and on commitments as well as on intended payoffs.