Ballots are sorted, numbered, and counted one precinct at a time. The order of precincts counted is random and determined by lot the week before the election.
One by one the total ballots from each precinct are separated into piles of #1 votes by candidate.
In the 1993 Council election, only Ken Reeves had more # 1 votes than he needed to be elected. (On the School Committee side Henrietta Davis and David Maher had a"surplus" of #1 votes, more than the 3001 required (just over 14 % of the votes). Reeves received 2755 # 1 votes, a surplus of 573 over the 2182 (10%) required for election. All Reeves' #1 votes were numbered: 1 to 2755, precinct by precinct in the order determined by lot. .
To select which 573 of the Reeve's total #1 votes would be counted as surplus, the election commission calculated the proportion of Reeve's votes that were surplus. They did this by dividing his total #1 votes (2755) by his surplus (573). The result, 4.8, was rounded to the next whole number, 5. Thus, approximately one of every 5th #1 vote for Reeves was a surplus vote.
Next, every 5th ballot by number (Reeves' ballot #1,5,10,15, etc.) in Ken Reeve's #1 pile was transfered to the candidates ranked #2 on those surplus ballots. Of Reeve's surplus, the largest number (110) went to Jonathan Myers, followed by Ed Cyr (87) and Katherine Triantafillou (76)
This redistribution of "winners' votes in excess of quota is designed, supporters say, to give the balance of power to the majority of voters while maintaining minority representation.