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A timeline of events and decisions that has affected the implementation of the Decision Review System (DRS)
June 25, 2012
A decision is made to trial the DRS in the Test series between Sri Lanka and India starting in July 2008.
Virender Sehwag becomes the first player to be given out after the on-field umpire's decision was overturned by the use of DRS. In three Tests, India make only one successful review; Sri Lanka make 11. The system reveals some glitches in its first experiment and receives mixed reviews.
ICC expands the scope of DRS by including Hot Spot as a tool for decision-making, allowing it to be trialled during the second and third Tests between Australia and South Africa.
There is serious opposition to DRS after the BCCI decides against using the system for the Tests against Sri Lanka, and other boards begin to complain over the costs borne by the host nation. Instead, they call on the ICC to fund DRS.
The ICC says the DRS will be used in the 2011 World Cup. While ball-tracking, it said, would be used for all games, Hot Spot would be available for the semi-finals and final.
Hot Spot, it is announced, will not be used for the World Cup as the "supplier advised it was not willing to supply its cameras for the tournament."
A controversial moment in the World Cup when Ian Bell is ruled not out, with Billy Bowden sticking to his original decision as a result of the 2.5 metre rule. It triggers a spat between the BCCI and the ICC. The rule is subsequently tweaked to ensure consistency.
The BCCI reiterates its opposition to the DRS following a recommendation by an ICC committee to implement the system in all internationals.
A compromise is struck when the ICC unanimously agrees to make DRS with Hot Spot - subject to availability - mandatory in all Tests and ODIs, with ball-tracking removed from the compulsory list. The ICC also moots raising a sponsor to fund DRS.
The BCCI and Hot Spot reach an agreement to use the technology for India's home season.
Hot Spot is criticised by the BCCI after it proves inconclusive on several occasions on India's tour of England. It decides to revisit the agreement reached with the ICC in June.
Hot Spot, it is decided, will not be used for India's home ODIs against England. Its owner cites disappointment with performance, and not having the BCCI's support, as the reasons.
The DRS is no longer mandatory, says the ICC, leaving it subject to the bilateral agreement between the boards.
The ICC decides on testing the effectiveness of the two ball-tracking technologies - Hawk-eye and Virtual Eye - independently at Cambridge University.
Following successful testing of DRS technology, the ICC Chief Executives Committee reiterates its commitment to making DRS mandatory in international cricket. The BCCI, however, says its stand remains unchanged.
© ESPN Sports Media Ltd.
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