Jan Roskam was an American Aerospace Engineer. The Roskam method can be seen in the 8th book in his series on airplane design: Airplane Cost Estimation: Design, Development, Manufacturing and Operating. It is a very good and lengthy series if you ever want to do preliminary aircraft design (did it for various University projects) albeit, as I said earlier, it being slightly out dated. His method considers various things from crew costs, fuel charges, aircraft cost, engine cost, TAT cost, en-route costs etc. The result is the total cost for a particular sector, which can then be translated into cost per seat per mile, or whatever unit you fancy. If anyone wants more detail you can send me a PM.
Back to bmi regional (or however it is stylised)....
Last edited by planenut321; 2nd Nov 2013 at 20:52.