how the duck worth and Louis method started in cricket?

Question

how? when ? and who r the D & L?

Answer 1

The D/L method was devised by two statisticians, Frank Duckworth and Tony Lewis in 1998, and has been adopted by the International Cricket Council as the standard method of calculating target scores in shortened one-day matches.

Previous methods used to achieve the same task included the use of run-rate ratios, the use of the score that the first team had achieved at the same point in their innings, and the use of targets derived by totalling the best scoring overs in the initial innings.

All of these methods have flaws that are easily exploitable. Run-rate ratios, for example, do not account for how many wickets the team batting second have lost, but simply reflect how quickly they were scoring at the point the match was interrupted. Thus if a team felt a rain stoppage was likely, they could attempt to force the scoring rate without regard for the corresponding highly likely loss of wickets, skewing the comparison with the first team. The other methods have similar flaws; these flaws are not present, or at least effectively normalized, by the D/L method.


If you want to know more details aboiut D/L Method, please check website:

http://en.wikipedia.org/wiki/Duckworth-Lewis_method#History

Answer 2

History :-

The D/L method was devised by two English statisticians, Frank Duckworth and Tony Lewis in 1998, and has been adopted by the International Cricket Council as the standard method of calculating target scores in shortened one-day matches.

Previous methods used to achieve the same task included the use of run-rate ratios, the use of the score that the first team had achieved at the same point in their innings, and the use of targets derived by totalling the best scoring overs in the initial innings.

All of these methods have flaws that are easily exploitable. Run-rate ratios, for example, do not account for how many wickets the team batting second have lost, but simply reflect how quickly they were scoring at the point the match was interrupted. Thus if a team felt a rain stoppage was likely, they could attempt to force the scoring rate without regard for the corresponding highly likely loss of wickets, skewing the comparison with the first team. The other methods have similar flaws; these flaws are not present, or at least effectively normalized, by the D/L method.

Application :-

The D/L method is relatively simple to apply, but requires a published reference table and some simple mathematical calculation. As with most non-trivial statistical derivations, however, the D/L method can produce results that are somewhat counterintuitive, and the announcement of the derived target score can provoke a good deal of second-guessing and discussion amongst the crowd at the cricket ground. This can also be seen as one of the method's successes, adding interest to a "slow" rain-affected day of play