Further to my explanation.

Generally when the flt schedule is loaded, initially the inventory is sort of in a limbo land. Airlines don't really care that far out how many bookings are made as historically most will be cancelled or altered. For example 11 months out the flt will be loaded with overbooking profiles of 4 or 5 hudred percent. So be very carefull with your assumption of 15 percent sold. Fifteen percent of what. 100 physical seats on the aircraft, 500 seats for sale in the inventory. As time get closer to travel the overbooking profile reduces. At a certain time the flight will be 'indexed'. This means it is turned into reality. Proper profiles and SCI's are now set and the flt will be closely monitored by the revenue management area. Generally about 6 months out. Flts at peak periods ie national holidays are indexed when loaded into the system.
There you go, more useless info to store.

Now if you want any info on the effect of the MCT (minimum connection table) on schedules/availability, more than happy to spout forth with more waffle (albeit correct waffle).