Hi, In B.A , as far as I know, we use a program based on the NASA/FAA CARI-6 software.
http://www.faa.gov/data_research/res...biology/cari6/
The company feeds in your monthly roster and it comes up with a monthly dose. It uses generic data for flights and not actual routes or flight levels.
Still, it is better than nothing, and I suppose it is the minimum that they could get away with without costing them any money.