Southwest Airlines fans know the drill: Check in to your flight exactly 24 hours in advance and secure your spot in line to board the plane. What seat you’ll end up in? That’s a mystery until the last minute.

A puzzle to some and an invigorating challenge to others, Southwest’s unique boarding process and one-class cabin are now under the microscope as the airline looks for ways to prop up its financial performance. In a call with investors Thursday, Southwest CEO Bob Jordan said executives are “very seriously studying” seating and the way passengers board the planes.