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.
In most organizations, evaluations run in only one direction, with the manager assessing the managee. The managee typically disagrees with the assessment, especially if it is worse than his or her self-assessment, because most people believe themselves to be better than they really are. Managees also have opinions about managers that they wouldn't dare bring up in most companies, so misunderstandings and resentments fester. This perverse behavior undermines the effectiveness of the environment and the relationships between people. It can be avoided by getting in sync in a high-quality way.
Your reports have to believe that you're not their enemy--that your sole goal is to move toward the truth; that you are trying to help them and so will not enable their self-deception, perpetuate a lie, or let them off the hook. This has to be done in an honest and transparent way, because if someone believes they are being pigeonholed unfairly the process won't work. As equal partners, it is up to both of you to get to the truth. When each party is an equal participant, no one can feel cornered.