This article is from 2010, but sort of helps explain...
Originally Posted by bellzisu
On Schedule - Big 12 Conference - Official Athletic Site
"How did you determine the home/away balance for each team?
The first review by the athletic directors included a number of staff-developed guidelines, understanding that teams would play five home games/four away games in alternating years. We recommended that the school that has been involved in neutral site Conference games (OU-UT, BU-TTU, KU-MU and ISU-KSU) each went 4-4-1 (home-away-neutral) so that no program would ever have just three home designated Big 12 games in a year.
Our familiarity with the mindset of the institutions over the course of 15-plus years provided a solid point of reference from which to start. We recommended that each institution have multiple games per year in the state of Texas, a balance in the number of the longest charter flights each year, some competitive equity combined with financial impact related to gate and an effort to minimize the number of repeat games at the same site from the final year of the 12-team league to the first year of the 10-team conference.
The athletics directors seemed pleased with the first six grids that they reviewed, but asked if some minor adjustments were feasible. After a second review it was clear the athletic directors were more interested in getting the schedules right for the long run and not as concerned about the repeat site issue for 2010 and 2011. Make no mistake, that was a concern, but it was out-weighed by other factors.
In the approved matrix, each school will play at least two games per year in Texas; the Texas schools make only two trips per year to the northernmost schools; and we were able to address home/away opponent balance. We got down to as few as six repeat sites conflicts before addressing the input of all 10 schools and ended up with, I think, 11 conflicts before we settled into the desired home/away annual rotation."