The Umpire Decision Review System(abbreviated as UDRS or DRS) is a new technology based system currently being used on an experimental basis in the sport of cricket. The system was first introduced in Test Cricket for the sole purpose of reviewing the controversial decisions made by the on-field umpires in the case of a batsman being dismissed or not.this is very efficient for both bowlers and batsman.its helps them to challenge umpire"s decision if they they think that it might be wrong