Dear Anand,
Thanks for your Input.
User not want than any testing person should not post the material to unrestricted with out UD. As in std SAP material and sample both can be post before UD or after UD.
Such requirement come from user because between testing and stock posting time take is around 18 to 20 day, in which user not aware how much sample he used for testing, and while posting he put in correct.So User required that every time when the user collect sample for testing at same time he should post in SAP.to maintain correct differences in the stock.
Asif