Final answer:
The performance appraisal system known as a 360 feedback is also called multiple source.
Step-by-step explanation:
The performance appraisal system known as a 360 feedback is also called multiple source.
It derives from a combination of ratings by supervisors, peers, employees supervised by the employee, and from the employee herself. Occasionally, outside observers may be used as well, such as customers.
The purpose of the 360-degree system is to give different perspectives of the employee's job performance, helping employees make improvements through their own efforts or through training.