And I will update these tables. The metric I've been debating with the longest is how to quantify conference championships. This is what I think makes the most sense. And I realize the RPI is flawed, but it at least evaluates all of the D1 schools and doesn't stop at just 25 schools.
1939-1948: Collective Winning Percentage of a Conference
5 points- conference champ of a league in the top-third in the country in winning percentage
4 points-conference champ of a league in the middle-third in the country in winning percentage
3 points- conference champ of a league in the bottom-third in the country in winning percentage
1949-1980: AP Poll began in the 48-49 season.
5 points- Win the conference title, ranked, and 3 other schools in the conference are ranked
4 points- Conference title, ranked, and 1 other school in the conference is ranked
3 points- All other conference championships
1980-2001: RPI
5 points- Conference title, top 25 in the RPI, plus 3 other schools in the conference are in the top 25
4 points- Conference title, top 25 in the RPI, plus 3 other schools in the conference are in the top 50
3 points- All other conference champions
2002-Present: KenPom
-Same criteria as the RPI, but simply using the KenPom numbers.