(Extracted from Principles by Ray Dalio)
Evaluate employees with the same rigor as you evaluate job candidates. Ask yourself: “Would I hire this person knowing what I now know about them?” I find it odd and silly that interviewers often freely and confidently criticize job candidates despite not knowing them well, yet they won’t criticize employees for similar weaknesses even though they have more evidence. That is because some people view criticism as harmful and feel less protective of an outsider than they do of a fellow employee. If you believe accuracy is best for everyone, then you should see why this is a mistake and why frank evaluations must be ongoing.