Hi Ramesh,
If the problem is how to understand the 11 months is completed the is an standard solution which I recommend.
You should define a date of monitor in IT0019 and use it as "Earliest accrual" in tab "Applicability" of section "Selection rules" of V_T559L.
Put the name of date earliest accrual and set the date 11 months after hiring date in IT0019. To calculate 11 months you can set a customizing to provide date automatically by system.
Regards,
Omid