Duckworth, Lewis and Senaka
Posted on March 17th, 2026
Senaka Weeraratna
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In the context of cricket,
Duckworth, Lewis, and Senaka refers to the two main systems used to ensure fairness in limited-overs matches: the Duckworth-Lewis (DLS) method for rain-affected games and the Senaka Weeraratna Rule, which is the conceptual foundation for the Decision Review System (DRS).
Key Figures and Their Contributions
- Frank Duckworth and Tony Lewis: These English statisticians developed the Duckworth-Lewis (D/L) method (introduced in 1997 and adopted by the ICC in 1999). It uses a mathematical formula to recalculate target scores when matches are interrupted by weather, based on the “resources” (overs and wickets) available to each team. In 2014, it was renamed the Duckworth-Lewis-Stern (DLS) method after Australian statistician Steven Stern became its custodian.
- Senaka Weeraratna: A Sri Lankan lawyer widely credited as the “father of DRS”. In 1997, he authored the concept of the Player Referral System, which allows players to challenge on-field umpiring decisions. While Duckworth and Lewis addressed weather interruptions, Weeraratna’s rule aimed to eliminate umpiring errors and enhance the integrity of the game.
Comparison of Systems
| Feature | Duckworth-Lewis-Stern (DLS) | Senaka Weeraratna Rule (DRS) |
| Purpose | Adjusts targets in rain-affected matches | Corrects on-field umpiring errors |
| Core Concept | Scoring resources (Overs and Wickets) | Player-initiated decision referrals |
| Format | Limited-overs (ODIs and T20Is) | All formats (Test, ODI, and T20I) |
| Origins | Frank Duckworth & Tony Lewis (1997) | Senaka Weeraratna (1997) |
Source: Chat GPT
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AI Overview
Frank Duckworth and Tony Lewis developed the DLS method to fairly adjust scores in rain-interrupted cricket matches. Senaka Weeraratna is a Sri Lankan lawyer who pioneered the player referral concept in 1997, which evolved into the Decision Review System (DRS), enabling players to challenge umpire decisions.
Key Aspects of the Individuals:
- Duckworth-Lewis-Stern (DLS) Method: Devised by English statisticians Frank Duckworth and Tony Lewis (later maintained by Steve Stern) following the 1992 World Cup. It calculates a new target for the team batting second based on remaining overs and wickets.
- Senaka Weeraratna & DRS: Senaka Weeraratna proposed the “Player-Referral” concept in 1997, which challenged the finality of on-field umpire decisions. His concept is regarded as the foundation of the modern DRS, which is now universally used to review decisions, notes this article.
Both innovations aim to enhance fairness, though they apply to different aspects of the game: one for weather interruptions (DLS) and the other for umpire errors (DRS).
This video explains the DLS method, a technique for recalculating scores in rain-affected matches:
This Video explains the DRS Method
Watch “DRS, Snicko, Hot Spot, Hawkeye & Umpire’s call explained and Sri Lankan lawyer Senaka Weeraratna identified as the world’s first person to conceive and publish the concept of ‘ Player Referral” which is the true basis of the Umpire Decision Review System ( UDRS or DRS).
https://youtu.be/5tuTDJaS2ik?si=t4FRU4vvM7A43_NL
Watch “DRS, Snicko, Hot Spot, Hawkeye & Umpire’s call explained and Sri Lankan lawyer Senaka Weeraratna identified as the world’s first person to conceive and publish the concept of ‘ Player Referral” which is the true basis of the Umpire Decision Review System ( UDRS or DRS).
https://youtu.be/5tuTDJaS2ik?si=t4FRU4vvM7A43_NL
Please visit
https://youtu.be/5tuTDJaS2ik?si=j3lKkUcWkUw
The reference to Senàka Weeraratna is found at 2.40 minute in this video playback program.
Senaka Weeraratna’s opinion has been published as a comment No.5
Both the International Cricket Council (ICC ) and Sri Lanka Cricket (SLC) must respond to the points made in his comment, if they are to remain credible.
One of the most controversial and misunderstood aspects of Cricket is the use of the Umpire Decision Review System or DRS. Cricket has come a long way since India assimilated Science and Technology into the game which has redefined how it is played today. But many people are still unsure how DRS works, especially Umpire’s call. Pale Blue Thoughts looks at DRS, Snicko, Hot Spot, Hawk Eye and Umpire’s call in detail.
If you watch and love cricket, this video is for you!
see also
Duckworth, Lewis, and Senaka-by Rohan Abeygunawardena
https://www.sundaytimes.lk/210815/sports/duckworth-lewis-and-senaka-452374.html