In college football how do they figure out strength of schedule?

What method does the NCAA use to find out a teams strength of schedule?In college football how do they figure out strength of schedule?
They take your opponents records and combine them to get the wins and losses. The best opponent's records means the toughest strengh of schedule.In college football how do they figure out strength of schedule?
the number of ranked teams you play
They have a preseason brawl.. The more people they take a dump on, the better their strength of schedule