what is duckward lewis method?

Question

it is used in cricket

Answer 1

ICC cheating Anthem?
~

Answer 2

In cricket, the Duckworth-Lewis method (D/L method) is a mathematical way to calculate the target score for the team batting second in a one-day cricket match interrupted by weather or other circumstance. It is generally accepted to be a fair and accurate method of setting a target score, but as it attempts to predict what would have happened had the game come to its natural conclusion, it generates some controversy. It is not used in first-class cricket or Test matches.

For more details about D/L Method, please check the following links:

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

http://www.cricinfo.com/db/ABOUT_CRICKET/RAIN_RULES/DUCKWORTH_LEWIS_1999.html

Answer 3

The D/L method was devised by two English statisticians, Frank Duckworth and Tony Lewis. It was first used in international cricket in the second game of the 1996/7 Zimbabwe versus England One-Day International series, which Zimbabwe won by 7 runs,[1] and was formally adopted by the International Cricket Council in 2001 as the standard method of calculating target scores in rain shortened one-day matches.

Previously, various different methods used to achieve the same task, including 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 older methods have flaws that are easily exploitable. For example, run-rate ratios 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. Notoriously, the "best-scoring overs" method, used in the 1992 Cricket World Cup, left the South African cricket team requiring 21 runs from one ball (when the maximum score from any one ball is generally six runs). Prior to a brief rain interruption, South Africa was chasing a target of 22 runs from 13 balls - which was difficult but at least attainable - but the possibility of an exciting conclusion to the game was destroyed when the team's target was reduced by only one run, to be scored off 12 fewer balls.[2] The D/L method removes - or at least normalises - this flaw: in this match, the revised D/L target would have been four runs to tie or five to win from the final ball. [3]


Application
The D/L method is relatively simple to apply, but requires a published reference table and some simple mathematical calculation (or use of a computer). 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.


Theory
The essence of the D/L method is "resources". Each team is taken to have two "resources" to use to make as many runs as possible: the number of overs they have to receive; and the number of wickets they have in hand. At any point in any innings, a team's ability to score more runs depends on the combination of these two resources. Looking at historical scores, there is a very close correspondence between the availability of these resources and a team's final score, a correspondence which D/L exploits.

Using a published table which gives the percentage of these combined resources remaining for any number of overs (or, more accurately, balls) left and wickets lost, the target score can be adjusted up or down to reflect the loss of resources to one or both teams when a match is shortened one or more times. This percentage is then used to calculate a target (sometimes called a "par score") that is usually a fractional number of runs. If the second team passes the target then the second team is taken to have won the match; if the match ends when the second team has exactly met (but not passed) the target (rounded down to the next integer) then the match is taken to be a tie.

An analogy that helps people to understand "resources" is to think of it as "earning capacity" remaining in a lifetime. Teams tend to score more runs an over at the end of an innings just as people tend to earn more a year at the end of a career - later balls (years) are more valuable. An analogy with wickets left might be health (a loss of wicket is becoming weaker). At the beginning (all overs/years left, all wickets intact/at one's healthiest), scoring/earning capacity is a maximum - 100%. What one can expect to score/earn in any other circumstances is expressed as a % of this maximum e.g. someone with 12 years left with health '6/10' (12 overs with 6 wickets) can expect to earn (score) 30% of the maximum.

Answer 4

if the openent team plays till 20rth over and the match has been stopped at any cause then they will declare that the e which has played till 20 over has a winning team.
this is called has duckward lewis method

Answer 5

THE most ridiculous method IN CRICKETwhich helped Freakin Australia to win against South africa in 1999 semi final and
with Sri Lanka in 2007 final.

Answer 6

a mathimatical method to re deceide the target of a curtel match

Answer 7

perfect formula used in cricket to provide help in matches result.if any querry write down ur querry and send it to ICC.