Hi....
Appraisal is depends on performance review.
Most companies have performance management policies and processes
that require, among other things, an annual formal written evaluation
for each employee. Some companies go further and also require quarterly
reviews.
Normally following steps are in most of the IT companies:-
Quarterly/half yearly/yearly performance review
Self performance review
Performance review from Head of Department
Performance review from HR
After probation.
Appraisal Confirmation with / without increment
After confirmation.
Yearly increment
(Standard / Special / Outstanding)
Promotion
I have attached our sample form of performance review for your information.
Hope this information will help you out.
Regards
Deeps