Book excerpt: The aviation industry has seen dramatic changes in the past two decades with significant growth during the 1990s; a significant industry disruptive event on September 11, 2001; and an economic decline resulting in a sharp rise in fuel prices that has substantially changed the economics of airline operations and a decline in growth. During this period, airlines have adapted to the changes in various ways, many of which have resulted in adaptability issues for airport operators, thus raising the question of "is there a better way" to be more flexible and responsive to airline service changes in good and bad times. From an airline perspective, cost reduction since September 11 has been a prominent focus. From an airport operator perspective, adapting to and accommodating changing flight services by incumbent carriers as well as new entrant services has been a key focus. In recent years, offering more cost-effective solutions to retain or encourage new services in the face of service reductions has become a key focus. Airport operator interests in common use have been heightened by the potential for achieving a reasonable balance between airline and airport operator interests. The implications of transitioning from a traditional model (of airline facility use and leasing focused on dedicated facilities) to common use has elicited varying and, often, conflicting perceptions of benefit and cost.