I wrote an Electowiki article that describes VoteFair representation ranking. The "history" section explains its origin and usage. Here is the link to it: https://electowiki.org/wiki/VoteFair_representation_ranking The section titled "calculation steps" describes it in detail, and an example is supplied. Richard Fobes For convenience, below is the opening text from the article: VoteFair representation ranking is a Proportional-representation (PR) vote-counting method that uses ranked ballots and selects a candidate to win the second seat in a two-seat legislative district. The second-seat winner represents the voters who are not well-represented by the first-seat winner. Any single-winner election method that uses ranked ballots and pairwise counting can be used for the popularity calculations. This method can be repeated, such as to select the winners of the second and fourth seats in a five-seat district. Description This method first identifies which voters are well-represented by the first-seat winner. Then a reduced influence is calculated for these ballots. Their influence is determined by the extent to which they exceed the 50% majority minimum that is needed to elect the first-seat winner. The remaining ballots have full influence. Using these adjusted influence levels, the most popular of the remaining candidates becomes the second-seat winner. This method ignores which political party each candidate is in, yet the winners typically are from different political parties. If a district has 5 seats, the third-seat winner and the fourth-seat winner are identified using the same steps that were used to fill the first two seats. In this case the fifth-seat winner would be determined by asking voters to indicate their favorite political party, calculating which party is most under-represented, looking at just the ballots that indicate that party as their favorite, and identifying the most popular candidate from that party.