The question.. . Subjective performance evaluations are subject to several rater errors, which makes objective measures seem a better alternative. Discuss when subjective performance evaluations might be better (or more feasible) than objective ratings.
You would want to use an objective evaluation when you can directly assess all employees and compare their individual performance to other employees. Subjective evaluations are focused on intangible qualitiesSubjective could be better to implement when there is a complicated systems in place, or situations when supervisors have a more personal relationship with the employees they would be evaluating. These would be beneficial for feedback since they are reliant on the managers personal views on how they have been working, since they would know first hand.