Can someone explain to me what I am missing with reserve. I'd think it should be simple math but I don't get it. For example, say a company has 50 lines up for bid on a certain airframe/city. That company has 67 FOs on that airframe/city status. It would seem that the company should then have 17 FOs on reserve after covering their lines and at 30% of the staff, it would be decent coverage. Instead, the company has 22 pilots on reserve. How does this work? Doesn't this leave entire lines open?