It's a good description that goes in both directions. 360 reviews are popular because they reduce single-source bias (a subclass of Common Method Variance). Dif

It's a good description that goes in both directions. 360 reviews are popular because they reduce single-source bias (a subclass of Common Method Variance). Different perspective of an employee can helps account for unique variance in the employees' true performance. From my perspective Ensorceled's comment demonstrate their value rather than their shortcomings.