The ICC women's rankings were launched on 1 October 2015 covering all three formats of women's cricket. The ranking system gives equal weight to results of Test, ODI, and T20 matches. It was designed by statistician and ICC Cricket Committee member David Kendix and utilizes the same methodology as men's cricket rankings. Each team scores points based on the results of their matches over the last 3–4 years − all matches played in the 12–24 months since the first of October before last, plus all the matches played in the 24 months before that, for which the matches played and points earned both count half.