Final answer:
The 360-degree feedback appraisal process is highly effective, as it involves more frequent and comprehensive feedback from multiple sources including supervisors, peers, and sometimes customers, which supports employee improvement.
Step-by-step explanation:
Among the various performance appraisal processes, 360-degree feedback involves more frequent feedback and is considered very effective. In a 360-degree performance appraisal, not only does the supervisor provide feedback, but so do peers, direct reports, and sometimes customers. This comprehensive system offers multiple perspectives on an employee's job performance, supporting improvements through self-effort or training. While not without criticism, this method aims to provide employees with a broader understanding of their performance and areas for development. Despite some studies suggesting ratings from this method can be unreliable, the acquiring of feedback from various sources can enhance the appraisal process and lead to a more fulfilling discussion on performance discrepancies, leading to better outcomes.