Hi Harshal,
This FM gives you the valid from and valid to date in OPR_TAB table.
You have to pass MATNR,PLNTY,PLNAL. Keep "Date From" and "date to" as its given by FM.
In OPR_TAB you will get DATUB for respective operations.
If you want to develop custom report for multiple materials get help from Abapers, they will make program using this FM.
Regards,
Amarnath Dube