1. Offer a more comprehensive view towards the performance of employees.
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2. Improve credibility of performance appraisal.
3. Such colleague’s feedback will help strengthen self-development.
4. Increases responsibilities of employees to their customers.
5. The mix of ideas can give a more accurate assessment.
6. Opinions gathered from lots of staff are sure to be more persuasive.
7. Not only manager should make assessments on its staff performance but other colleagues should do, too.