Not saying it is. Though I do know from the medical field especially that where mistakes are found is in the handoff or shift change, which is one reason it took so long to see any meaningful change in the way residency worked for doctors. Despite the incredibly long hours, the new docs didn't tend to make mistakes in care during the shift. I think long shifts aren't necessarily the problem, it's when we're pushed to keep working when we can actually feel the fatigue and malaise of the day set in. Maybe the only way (right now, due to the way you work or you die) is to mandate shorter shifts, but I would love to see a culture set up where you work until you start to feel it, and then go home or take a break, however long that break needs to be. That's probably fantasy of the highest order, but hey, why not imagine ways where things could like that and push for them?