Much has been said and written about cricket’s Decision Review System (DRS) in the last few weeks. About 95.3% of what has been said is total rubbish. But it is time to take stock of what we’ve learned about the DRS, where’s going and how cricket can make the best use of the available technology to improve the spectacle for its paying customers.

I’ll publish this in sections - it’s turned out to be a bit longer than I thought…


Part 1: Introduction Part 2: Technology Part 3: Reviews & umpiring Part 4: Proposals & conclusions

Ashes DRS horror show rolls on - Daily Telegraph


To be done:


Evidence of absence


Sources of noise

Cum hoc ergo propter hoc

Real-time Snicko



Margin of error & "umpire's call"


Outfield catches



Run-outs & stumpings


Umpire-led reviews



Loss of reviews & "umpire's call"

Umpire-led reviews

Current situation with run outs

Conflict of interest

Gaming the system - a strategy for selecting reviews

  • Australia's poor choices
  • Evidence of emerging strategies

Umpires' role & guidelines

Benefit of the doubt & "walking"

Authority of on-field umpire

Umpires' union

TV umpire's conflict of interest



No loss of review for "umpire's call"

No umpire-led reviews

"Evidence of absence" principle

Communication & transparency



Evolution not revolution

Benefits for the paying customer


[1] Board of Control for Cricket in India [2] As Deep Throat said: follow the money.