Annual reviews are a terrible way to evaluate employees
They're cumbersome and demoralising, and it's time to replace them. Gallup data indicate that 86% of employees don't think annual performance reviews accurately represent their work. Best selling author of "Love + work: how to find what you love, love what you do, and do it for the rest of your life", Marcus Buckingham, explains the three most significant failings of this practice: their infrequency, how dehumanising they can be, and how irrelevant to real-world performance they are.
From The Wall Street Journal