Introduction
The Decision Review System, usually called DRS, gives teams a formal way to challenge certain on-field decisions in competitions that use it. Depending on the format and playing conditions, it may use tools such as ball-tracking, edge-detection technology and video replays to help officials assess a specific incident. DRS is not a general replay service for every moment in a match: it operates within defined categories, time limits and review allowances.
Why the system exists
An on-field decision is made in real time, often with players moving quickly and the ball travelling at speed. Video and technology can provide additional evidence when a decision is challenged. The aim is to improve decision accuracy while keeping the match moving and preserving the responsibilities of the on-field officials. Different competitions may use different technology packages, so it is important not to assume that every match offers identical review tools.
Which decisions may be reviewed
Common review situations include certain decisions about whether a batter is out or not out, but the precise scope depends on the competition rules. A team cannot necessarily challenge every judgement made by an umpire. Procedures also specify who may request a review, how the request must be made and when it becomes too late. Always consult the current playing conditions for the tournament being watched.
The review process
A review begins when an eligible team makes a valid request within the permitted time. The third umpire or review official examines the relevant footage and technology outputs, then communicates findings through the established process. The on-field umpire applies the protocol and announces the outcome. A broadcast may display graphics while the process is underway, but those graphics should not be treated as final until the official decision is confirmed.
What ball-tracking can show
Ball-tracking estimates the ball's path using camera data and a technical model. In an lbw review, the relevant questions include where the ball pitched, where it hit the batter and whether it would have hit the stumps. The system provides an evidence-based projection, not a camera literally seeing the future. The rules explain how the result is used, including any tolerance or umpire's-call provisions.
Edge detection and replays
Technology used to help identify contact between bat and ball can assist with decisions involving a possible edge. Replays from different angles may help officials assess whether the ball touched the bat, pad or another part of the batter. No single image should be interpreted without the sequence and the technology's limitations. The review official considers the available evidence under the relevant protocol.
Understanding umpire's call
Some competitions apply an umpire's-call provision when technology indicates that a marginal part of the ball-tracking result is within a defined tolerance. This is intended to preserve the on-field decision in specified borderline situations. It does not mean the technology is ignored, nor does it mean all close decisions automatically stay unchanged. The exact application is governed by the current rules.
Review allowances and outcomes
Teams may have a limited number of unsuccessful reviews, and the way that allowance is affected by an outcome can depend on the playing conditions. A review can confirm the original decision, overturn it or lead to a different ruling within the rules. Do not infer the remaining review count from an old graphic: check the current scoreboard and competition regulations.
A practical example
Imagine an lbw appeal is turned down. The fielding team requests a review, and the footage is checked for pitching location, impact and projected path. Each element is assessed according to the applicable criteria. The final call depends on the evidence and the review rules; a dramatic replay alone does not guarantee that the original decision will change.
Common misunderstandings
A frequent misunderstanding is that DRS can prove every disputed event beyond all uncertainty. Technology has defined capabilities and tolerances. Another is that every competition has the same review allowance and tools. A third is assuming that a review is successful only when the original decision changes; terminology and consequences should be checked against the competition's rules.
How to follow a review responsibly
Identify the decision being challenged, wait for the official outcome and distinguish the broadcast's explanatory graphics from the umpire's final ruling. If a rule or review result is unclear, use the tournament's published playing conditions or official match report. When discussing a close decision, explain which part of the process is relevant instead of treating one screenshot as complete evidence.
Frequently asked questions
Does every cricket match use DRS? No. Availability depends on the competition and its playing conditions.\n\nDoes DRS always overturn a close decision? No. The evidence and the applicable review protocol determine the outcome.\n\nWhat is umpire's call? It is a rule-defined treatment of certain marginal ball-tracking results that can preserve the on-field decision.\n\nCan a team review any umpire decision? No. Only eligible decisions can be reviewed under the relevant rules.
Conclusion
DRS is a structured process that combines the on-field decision with additional evidence for specified incidents. To understand an outcome, check the decision under review, the technology used, the official result and the competition's current playing conditions. This approach is more reliable than assuming that a replay or graphic automatically tells the whole story.
Editorial checklist
Before publishing this page, verify any competition-specific rule against the relevant governing body or official event regulations. Where a statistic or procedure varies by provider, name the provider and explain the definition used. Keep examples illustrative, label them as examples, and do not present them as official match data.