<P> The Duckworth--Lewis (D / L) method is a mathematical formulation designed to calculate the target score for the team batting second in a limited overs cricket match interrupted by weather or other circumstances . It is generally accepted to be the most accurate method of setting a target score . The D / L method was devised by two English statisticians, Frank Duckworth and Tony Lewis . After their retirements Professor Steven Stern became the custodian of the method . In November 2014, it was renamed the Duckworth--Lewis--Stern method (or D / L / S method). </P> <P> The basic principle is that each team in a limited - overs match has two resources available with which to score runs: wickets remaining, and overs to play . Where overs are lost, setting an adjusted target for the team batting second is not as simple as reducing the run target proportionally to the loss in overs, because a team with ten wickets in hand and 25 overs to bat can be expected to play more aggressively than if they had ten wickets and a full 50 overs, for example, and can consequently achieve a higher run rate . The Duckworth--Lewis method is an attempt to set a statistically fair target for the second team's innings, based on the score achieved by the first team, taking their wickets lost and overs played into account . </P>

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