How Duckworth-Lewis method work

Source: The post how Duckworth-Lewis method work has been created, based on the article “Duckworth levelled the cricket field, didn’t he?” published in “Live mints” on 28th June 2024

UPSC Syllabus Topic: GS Paper

Context: The article discusses the legacy of Frank Duckworth, a statistician who co-created the Duckworth-Lewis method. This formula helps adjust cricket scores when rain interrupts play. It was made to ensure fairness in games affected by weather. Duckworth recently passed away at 84.

What is Duckworth-Lewis method?

1. The Duckworth-Lewis method was created by statistician Frank Duckworth and former cricketer Tony Lewis. It adjusts cricket scores when rain interrupts play.
2. The method uses a chart that factors in the remaining deliveries and wickets to calculate a fair score target.
3. It was introduced after an unfair game outcome in the 1992 Cricket World Cup semi-final where South Africa lost due to an inadequate rain rule.
4. This method was officially adopted by the International Cricket Council in 1999. Since its adoption, it has been essential for 50-over cricket, though less effective in T20 formats.

How Duckworth-Lewis method work?

1. The Duckworth-Lewis method combines the remaining deliveries and wickets to create a “resource percentage.”
2. A chart, known as the DL chart, helps calculate this percentage for any match situation.
3. The chart starts with ‘100%’ when all overs and wickets are available, decreasing as resources diminish.
4. When play resumes after an interruption, the method adjusts the target score based on the resources left.
5. The method allows for fairer game conclusions under disrupted conditions.

Question for practice:

Discuss how the Duckworth-Lewis method ensures fairness in cricket matches disrupted by rain.