One review to rule them all

Performance reviews based on results may not work for every job. For example, evaluating a teacher based solely on student test scores, since environmental factors such as poverty or lack of support may also play a part.

It is vital to use only one type of review system to create fairness for all. If judging on results doesn’t work, an organization could try a behaviour-based system but revise it so that it doesn’t favour employees working in the office.

The most accurate performance ratings are based on observable behaviours rather than subjective evaluations of traits. For example, the trait "creativity" cannot be defined.

Shifting the focus of performance appraisal from behaviours to results