There has been lot of questions about the proposed Duckworth-Lewis method ever since it was introduced back in 1997. The method has modified recently for a better accuracy and it is now known as Duckworth-Lewis-Stern (D/L/S) method.
The controversial method has yet again made headlines after the first semi-final of world cup 2015 which featured South Africa and New Zealand. The D/L/S was implemented in South Africa vs New Zealand match earlier today. South Africa were in pole position to post a hefty total with in-form AB de Villiers and du Plessis are at crease when rain interrupted play at 38 overs.
Basically D/L/S method considers only two things, the number of overs and the number of wickets left. The method also doesn’t consider a team getting bowled out before the end of innings but it calculates the target when the rain interruption occurs.
Both the players scored fifties and are in for a heavy knocks towards the end of the innings. With the rain effecting the game, the game got reduced to 43 overs per side.
Since the rain occured at 38 overs with South Africa still having 7 wickets in hand. The resources to be lost by South Africa are 7 overs and the compensation runs for those overs will be added based on the percentage calculated.
If the overs are reduced before the first ball is bowled then the game will have no effect of D/L/S method. Since South Africa lost 7 overs only after playing 38 overs, they were given 6% increase to the runs they scored at the end of the innings.
6% increase results in 17 runs which took South Africa score to 298 if the match was originally 43 overs before the game started. D/L method thus neutralises the advantage of chasing team by doing the perfect simulation.
D/L/S method has never been kind to South Africa as we can historically remember 1992 semi-final where they lost to England and again for the second time D/L/S method ruined South Africa’s world cup chances.
The target will always increase if the overs are reduced while batting first since the team batting first will play thinking they have 50 overs to play.