their operation, free seating was common, but some carriers now augment
their service by providing allocated seating.
Finally, tourism products can be viewed as evolutionary, beginning with the
development and formulation of new products, then building sales along a cycle
of evolution. Development of new products is the main form of innovation in
tourism and is essential for sector growth. They are important to diversification,
increasing sales and profits and competitive advantage. As the product becomes
established it may then move through the various stages of the life cycle, an
approach adapted by Butler (1980) for destinations in the ‘tourism area life cycle’.