@Khyati Garg These three combined will give final percentage,I skipped percentages for both as subjective to performance and competency framework
Salary corrections and promotions liked hikes will have to be tagged to competency+Band and grades
Top 20% - overall 25%
Salary correction- goes as high as 35%
Promotion liked - based on band and grades ,if not then 12-17% for senior ,20-30 for mid level,25-35 for junior level
Rest hovers around 15%
Create a matrix and start bucketing ,a framework will help run it smoothly