Hi,
This was discussed in recent threads.
Appraisal Eligibility for New Employees
If the effective date of the appraisal is the 1st of April every year, then an employee who joined in January will not be eligible for the appraisal as they have just completed 3 months of service with the organization. The process is that they need to wait until the next appraisal cycle. They can either be considered for the next April appraisal, or once they complete one year by the end of December, an interim hike can be given, followed by another hike by April, thereby linking them to the regular appraisal cycle.
Interim Hikes for Other Categories
The same applies to other categories. Those who joined in November can be rewarded with an interim hike after completing one year.
Fixing a Common Month for Interim Hikes
Instead of giving interim hikes on a monthly basis, fix a common month and address all the in-between cases there.