Decision Review System

Decision Review System

Ball tracking visualisation in 2020.
Abbreviation	DRS
Status	Active
Year started	2008
First published	2008
Organization	International Cricket Council (ICC)
Base standards	Ball tracking: Hawk-Eye or Virtual Eye Sound analysis: Real Time Snicko Infra-red imaging: Hot Spot (Australia-only)

The Decision Review System (DRS), formerly known as the Umpire Decision Review System (UDRS), is a technology-based system used in cricket to assist the match officials in their decision-making. On-field umpires may choose to consult with the third umpire (known as an Umpire Review), and players may request that the third umpire consider a decision of the on-field umpires (known as a Player Review).

The main elements that have been used are television replays, technology that tracks the path of the ball and predicts what it would have done, microphones to detect small sounds made as the ball hits bat or pad, and infra-red imaging to detect temperature changes as the ball hits the bat or pad.

While on-field Test match umpires have been able to refer some decisions to a third umpire since November 1992, the formal DRS system to add Player Reviews was first used in a Test match in 2008, first used in a One Day International (ODI) in January 2011, and used in a Twenty20 International in October 2017.