Way off topic here and into my everyday worklife, but that's completely different How much the average wage was over a particular period, for a certain group of people, easy-peasy, childs-play, simple maths, BA must already have that, and if they haven't, I wasn't joking when I said a minute or two to write.

OTOH scheduling of various types is usually a very* complex issue, there are companies who only sell scheduling software and make a good living at it, its a tough problem to crack and every type is different, with usually about 4 rules that are strightfoward, modified by more rules that are partly contradictory with another set on top that are completely contradictory, and then some exceptions to those. I haven't dealt with BA crew scheduling but I'd bet that sums it up

* I've been involved with it before, whatever package you use, the customer usually has some "special" requirement (read, lost in the mists of time but wont change) that means either the s/w wont work, or it needs to be massively rewritten.