I used to fly for a very well respected UK airline. They wrote a “propaganda” pamphlet to the crews on how wonderful their FRMS system was on making the rosters. Interesting in that I wrote to the author pointing out on release the rosters were fine, but they were never flown as the rosters were always completely changed by day to day crewing. ( to knackering patterns). Funny old thing I never got a response. But bet the pamphlet looked great to the CAA.
Am absolutely certain fatigue played a huge part in this crash.