360 degree appraisal involves evaluating an employee's performance from the perspectives of supervisors, peers, subordinates, customers, and oneself. It was first developed by General Electric in 1992. Some benefits of 360 degree appraisal include personal and team development, facilitating change, and creating a learning organization. However, it can also be time consuming and difficult to implement due to potential biases from raters and manipulation of results. Companies like Tata Motors and Hindustan Unilever utilize 360 degree feedback along with goal setting and career development discussions to improve employee performance.