The NCAA selection committee looks at 6 different rankings:
Three based soley on wins and losses (RPI, KPI and ESPN SOR).
Three that look at scores too (Pomeroy, Sagarin and ESPN BPI).
On the Team Sheets, the NCAA lists all these rankings at the top, including an average of each group of three, and a six-rank average.
In looking at historical correlations between these rankings and the ultimate seeds, it appears to me that the average of RPI, KPI and ESPN SOR is about 2-3x as important as the average of the score-based rankings.