Can you provide a real-world case study where the method of comparing self reviews against observer reviews significantly impacted an employee's performance?

Alternative strategies to the method of comparing self reviews against observer reviews in performance evaluations could include:

1. 360-Degree Feedback: This method involves collecting feedback from all around an employee, including peers, subordinates, supervisors, and sometimes, from customers and themselves. This provides a holistic view of an employee's performance.

2. Management by Objectives (MBO): In this method, managers and employees agree on specific, measurable, achievable, relevant, and time-bound (SMART) goals. The employee's performance is then evaluated based on these objectives.

3. Behavioral Checklists and Scales: These are used to rate an employee's behaviors against a set standard. They are often used in conjunction with other methods to provide a more comprehensive view of an employee's performance.

4. Self-Assessment: Employees evaluate their own performance. This can be useful for encouraging self-improvement and personal development.

5. Peer Reviews: Colleagues at the same level evaluate the employee's performance. This can provide a different perspective and can be particularly useful in team-based work environments.

Global companies like Google and Apple can implement the method of comparing self reviews against observer reviews to improve their performance review process by incorporating it into their existing performance management systems. They can start by educating their employees about the process and its benefits. This includes explaining how it can provide a reality check for those who may be overconfident or underrate themselves. They can then ask employees to conduct self-reviews and also have their peers or supervisors conduct observer reviews. The results from both can be plotted against each other to identify any discrepancies. This can help in identifying areas of improvement and in creating a more balanced and comprehensive performance review.