I think probably the best way to start with that is actually with the flying public. Basically, the flying public lets airlines know through where they purchase tickets, through their trends on what times they like to leave and on what routes, and that basically proves the viability.
It then goes to the network planner, who basically builds a network schedule and utility around that schedule to provide the best service possible to travelling Canadians and the public. Then from that point it goes to our flight dispatch systems, which try to provide the most optimum routing, and then, basically on the day that a flight is being flown, it's the pilot in command, working with Nav Canada.