Source:  Chat GPT

Duckworth, Lewis, Stern Rule ( DLS) 

Senaka Weeraratna Rule (DRS)

The Duckworth-Lewis-Stern (DLS) method and the Decision Review System (DRS) are the two most significant technological innovations in modern cricket, respectively addressing rain interruptions and officiating accuracy. While the

DLS method is officially attributed to British and Australian statisticians, the DRS is increasingly associated with the pioneering conceptual work of Sri Lankan lawyer Senaka Weeraratna. 

The Duckworth-Lewis-Stern (DLS) Method

This mathematical system is used to calculate target scores in rain-affected limited-overs matches. 

• Inventors: Originally developed by English statisticians Frank Duckworth and Tony Lewis (DL method) in 1997.
• Evolution: In 2015, Australian academic Steven Stern updated the formula to reflect modern scoring rates, leading to its renaming as the DLS method.
• Function: It uses the “resources” available to a team—a combination of overs remaining and wickets in hand—to determine a fair revised target for the team batting second. 

The Senaka Weeraratna Rule (DRS)

While the International Cricket Council (ICC) officially introduced the Decision Review System in 2008–2009, its origin is widely credited to a proposal by Senaka Weeraratna. 

• The Concept: In 1997, Weeraratna first proposed a “Player Referral” system in a letter to The Australian newspaper.
• Core Principles: His proposal included four key elements that define modern DRS:
  1. Allowing players to challenge an on-field decision.
  2. Routing appeals through the captain or the dismissed batsman.
  3. A review by the third umpire using technology.
  4. Limiting the number of unsuccessful appeals per innings to prevent delays.
• Recognition: Despite his concept appearing 12 years before the official implementation of DRS, Weeraratna has yet to receive formal recognition from the ICC, though he is often referred to by commentators and historians as the “Father of DRS”. 
• He is increasingly becoming a source of comfort and pride to Sri Lankan Cricket fans for his work in changing the fundamental rules of Cricket (‘Player Referral’ concept) and at a time when the current Sri Lankan Cricketers ( T20 Tournament ) are failing to keep up with the glories of the past eras of Cricket ( 1996 World Cup Victory).

Source:  Chat GPT

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