Comment by rawgabbit

I saw it 20+ years ago in the US airline industry. At the time, the pilots and the flight attendants were considered a unit; they were scheduled as a unit and worked the same flights and overnighted at the same hotels. Most US airlines started scheduling the pilots and the flight attendants separately. The tradeoff is yes, this usually results in more efficiency or cost-savings. But when there is a severe snowstorm as happened to Southwest a few years ago; Southwest lost track of the pilots and the flight attendants and it made a bad problem exponentially more difficult.