MUMBAI: The jury is still out on cricket's controversial Decision Review System (DRS) a month after it made its World Cup debut. The International Cricket Council (ICC) has said that the technology has improved correct umpiring verdicts by more than seven percent in the World Cup. But not everybody is convinced about its efficacy and the Board of Control for Cricket in India (BCCI), the world's richest cricket body, remains a steadfast opponent. Infuriated by Ian Bell's apparent letoff for lbw in the tied India-England match, BCCI secretary N. Srinivasan wrote an angry letter to ICC chief executive Haroon Lorgat, saying the incident exposed the inadequacy of the system. India captain Mahendra Singh Dhoni termed it “adulteration of technology with human thinking”. The ICC was forced to make a statement explaining the implications of the 2.5 meter rule which was used to rule Bell not out. Ireland captain William Porterfield was left fuming at Sri Lankan umpire Asoka de Silva's decision to give Gary Wilson out lbw despite replays showing that he had offered a shot to a delivery that appeared to hit him outside the line of off-stump. The ICC was again prompt in reprimanding the Irish captain for publicly venting his ire. The technology used by the ICC to improve correct umpiring verdicts in this tournament has been far from satisfactory without the use of the cutting edge Hot Spot technology. New Zealand questioned the DRS when Nathan McCullum was denied a caught-and-bowled decision against Sri Lanka's Mahela Jayawardene. Jayawardene was lucky to survive after the third umpire gave the benefit of doubt to the batsman though the catch looked clean from replays. Tensions flared following the decision as stand-in New Zealand captain Ross Taylor and the bowler had a heated debate with the on-field umpires. Taylor was asked if cricket should return to the old days when the fielders' words were taken for granted. “I guess it depends on the person. Look at Jacques Kallis, he asked the fielder if they caught it, and he trusts the word of the fielder,” Taylor said. South Africa's Kallis decided to walk after asking England wicketkeeper Matt Prior if his edge had carried. “I guess you put it up to the batsman to make the decision and at the end of the day, you just hope the technology is right. And if technology's not right, well then don't use it,” Taylor said. Strong words but, given that a decision can change the course of a match in the tournament, Taylor can not be blamed. The DRS has also had an effect on umpires who are put under the spotlight when a successful review overturns their decisions. Former Australian Test umpire Darrell Hair is also sceptical about the possible overuse of technology. De Silva left out Sri Lankan umpire Asoka de Silva was left off the International Cricket Council's list of officials for the World Cup quarterfinals Monday. De Silva had had a poor tournament and was involved in one of the most controversial incidents of the first round when he gave Ireland's Gary Wilson out lbw against West Indies. The decision was challenged by Wilson and replays showed the ball struck his pad outside off stump while he was playing a shot, but de Silva refused to overturn his decision. De Silva had seven decisions challenged under the review system and only on three occasions did his original call stand. Officials for quarterfinals March 23 – Pakistan vs. West Indies, Dhaka. Umpires: Billy Bowden and Steve Davis; Daryl Harper (third umpire), Bruce Oxenford (fourth umpire); Chris Broad (match referee). March 24 – Australia vs. India, Ahmedabad. Umpires: Marais Erasmus and Ian Gould; Richard Kettleborough (third umpire), Asad Rauf (fourth umpire); Ranjan Madugalle (match referee). March 25 – South Africa vs. New Zealand, Dhaka. Umpires: Aleem Dar and Rod Tucker, Kumar Dharmasena (third umpire), Nigel Llong (fourth umpire); Roshan Mahanama (match referee). March 26 – Sri Lanka v England, Colombo. Umpires: Billy Doctrove and Simon Taufel, Tony Hill (third umpire), Shavir Tarapore (fourth umpire); Jeff Crowe (match referee).