The ICC ODI Championship is an international competition run by the International Cricket Council in the sport of cricket. It currently involves the 10 nations that play Test cricket; Kenya, a non-Test country with full One Day International (ODI) status; and most recently Ireland, which qualified for the main ODI Table following their second victory over a Test playing nation in the ICC World Cup on 16 April 2007. Starting in 2009, the number of teams on the main ODI Table will be set to 16, with the 10 current Test nations joined by the top six finishers in the ICC World Cup Qualifier. Kenya and Ireland must re-qualify for ODI status in that event.
The competition is notional in the sense that it is simply a ranking scheme overlaid on all international matches that are otherwise played as part of regular ODI cricket scheduling. Other non-Test countries with One-Day International status aren’t included in the main table because they are yet to meet the promotion criteria.
In essence, after every ODI match, the two teams involved receive points based on a mathematical formula. The total of each team’s points total is divided by the total number of matches to give a ‘rating’, and all eleven teams are ranked by order of rating (this can be shown in a table).
By analogy to cricket batting averages, the points for winning an ODI match are greater than the team’s rating, increasing the rating, and the points for losing an ODI match are always less than the rating, reducing the rating. A drawn match between higher and lower rated teams will benefits the lower-rated team at the expense of the higher-rated team. An ‘average’ team that wins as often as it loses while playing a mix of stronger and weaker teams should have a rating of 100.
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