On Wednesday, the committee members submit an initial ballot via a computer program with the names of all eligible 339 Division I college basketball teams on it. In the first column, they vote "In" for as many as 36 teams. Those teams, in the committee member's estimation, should get an at-large berth, regardless of what happens in the conference tournaments. In the second column, they vote for teams that should be "under consideration" for an at-large berth, with no minimum or maximum restrictions.
A team that gets all but two "In" votes gets a berth. A team that receives three or more "under consideration" or "In" votes gets put on the "under consideration" board, listed in alphabetical order, along with teams that won their regular-season conference titles.
In ballpark terms, that typically means 22-27 teams are "In" for 36 at-large spots, with additional at-large spots opening as those "In" teams win their conference tournaments. So the average starting point for discussion is over roughly nine to 14 slots open for at-large teams.
Then, of course, the fun starts. A working list of the top eight teams is pulled from the "under consideration" board, and committee members rank each in a series of votes, with the top four eventually getting into the field. Before the votes to list and rank teams occur, of course, there is discussion, with "team sheets" being put before the committee members to allow them to compare teams' credentials, head-to-head.