Hi,
Correct me if I misunderstood your requirement, I assume your scenario is like below and solution is simple.
Overtime Hours Date Validity Period
9 18.12.2015 18.12.2015 + 90 Days (I.e. 18.03.2016)
8 25.12.2015 25.12.2015 + 90 Days (I.e 25.03.2016)
So, if your validity interval is 90 days then, C-off of 25.12.2015 will be added in first record.
Hence, employee will be in loss of deduction interval of 7 days (25-18.12.2015) as deduction end date is 18.03.2016.
Solution:
In table V_T559L, Deduction Interval, Configure it with accrual period, start and end with 0 relative days and in deduction interval, start and end with 90 days interval.
Hence, Quota function in time evaluation will generate two different record in IT2006.
like,
18.12.2015 - 18.12.2015 18.12.2015 - 18.03.2016
25.12.2015 - 25.12.2015 25.12.2015 - 25.03.2016
So, this is concept of deduction interval and validity of record interval.
Thanks,
Ketul