Contents: An «integrative management framework» for a systematic approach to strategic planning - Systems concepts as part
of contingency theory - Shared activity concept - Business transformation - The nature of the service product - The commercial
air transportation system - Managerial aspects of air carriers - A multi-factor screening model for international airline
comparison and ranking - Empirical research findings on Why? What? and How? aviation executives plan - Portfolio management
as an instrument of corporate planning - Strategic market segmentation - The notion of sustainable advantage - Benefits and
risks of portfolio classification concepts - Key implications of a portfolio-based business policy - Future research possibilities.