this blog portrays bell curve based performance assessment. and it also says that companies are away from bell curve based assessment.
UI Press, William H. Tucker
Performance Appraisals: Should You Grade Your Employees on a Bell Curve?
Bell Curve - Slide Geeks
Relevance of Bell Curve Method of Performance Appraisal
Should Employee Performance Be Judged on a Bell Curve?
First Step in the Performance Appraisal Process for Employee
Yerkes-Dodson Law: How It Correlates to Stress, Anxiety, Performance
Are we ready enough to say Goodbye Bell curve”?
Should Employee Performance be Judged on a Bell Curve?
TCS: TCS abandons bell curve based performance appraisal; shifting to system of continuous feedback - The Economic Times
Performance should be the only criterion for increments and bonuses to ensure fairness of companies' reward
Rethinking the Bell Curve: The Relevance of Performance Management for Performance Reviews