How do people usually do this? Do you wait until you're within 2 months of the delivery of the seventh plane and then schedule them all up at once, or do you do it one plane at a time? I'm thinking I'll just wait for convenience.
A little more complicated... but I "build" the 7 day schedule on paper and then create the routes one destination at a time, for the whole week, at the proper times, as each aircraft arrives and assign one to each aircraft. Then when the 7th aircraft arrives, I simply need to cancel and re-create all the routes as individual daily ones and they all slot together nicely without any re-timing or changing of slots. Of course, this only works when all the routes are less than 24hrs each and so can be assigned to individual aircraft.
This saves having 5 or 6 expensive planes sat around in storage or running lots of new routes only once or twice a week (which costs a lot in extra staff and makes the RI build REALLY slowly). Another advantage is that it hides your future intentions from competitors. If you create a once-daily to each of, say 14 new destinations as soon as the first aircraft arrives, they then have maybe 4 to 6 months to respond to all your new routes.