What are Southwest Airlines Co's Business Segments?
Glossary of Defined Terms
ASM- Available Seat Mile. A measure of capacity. ASMs equal the total number
of seats available for transporting passengers during a reporting period multiplied
by the total number of miles flown during that period.
Cargo Ton Miles-The total number of tons of cargo transported during a reporting
period, multiplied by the total number of miles cargo is flown during that period.
Cargo Ton Mile Yield- The amount of cargo revenue earned per cargo ton mile
during a reporting period.
CASM- (Operating) Cost per Available Seat Mile. The amount of operating cost
incurred per available seat mile during a reporting period. Also referred to
as “unit cost.”
Passenger Load Factor- A measure of utilized available seating capacity calculated
by dividing RPMs by ASMs for a reporting period.
Passenger Mile Yield- The amount of passenger revenue earned per revenue passenger
mile during a reporting period.
RASM- (Operating or Passenger) Revenue per Available Seat Mile. The amount
of operating or passenger revenue earned per available seat mile during a reporting
period. Passenger RASM is also referred to as “unit revenue.”
RPM- Revenue Passenger Mile. One revenue-paying passenger transported one mile.
RPMs equal the number of revenue passengers during a reporting period multiplied
by the number of miles flown by those passengers during that period. Also referred
to as traffic.
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