How Southwest Airlines Melted Down

When Southwest Airlines Co. reassigns crews after flight disruptions, it typically relies on a system called SkySolver. This Christmas, SkySolver not only didn’t solve much, it also helped create the worst industry meltdown in recent memory.

Airline executives and labor leaders point to inadequate technology systems, in particular SkySolver, as one reason why a brutal winter storm turned into a debacle. SkySolver was overwhelmed by the scale of the task of sorting out which pilots and flight attendants could work which flights, Southwest executives said. Crew schedulers instead had to comb through records by hand.