> Southwest has had a complete operational failure and is simply incapable of determining where their crews are, what flights they are eligible for, and associating them with flights on the schedule.

This has to be really hard as most systems were probably built assuming something that smelled like full staffing. Pilots can only fly X hours, and flight attendants usually can't be forced to take overtime ... there have to be similar constraints on ground crew, maintenance and gate workers, too. So when you are planning for an understaffed airline, it has to be extremely difficult to optimize where the failures will occur.