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ex business. SABRE helped changing rules according on the attitudes, priorities and preferences of the customer (Callon, 1996). SABRE linked in many travel agents around the country. The data communications from the travel agents to the hosts were based on dial up internet-like communication. The SABRE system served as the principal distribution network for flight schedules. In the schedule displays, each flight listing is a type of electronic shelf. SABRE lists codes for requesting information about origination and destination, flight time, departure and arrival time, and so forth. In order to build the system, from 1976 to 1982, American Airlines had invested approximately $114 million in hardware plus another $46 million in expansion of central site facilities and equipment. The result was a dramatic transformation of airline ticket distribution methods (Laudon , 2005).

结论-Conclusion

Porter suggests three 'generic' competitive strategies to do better than other companies in a particular industry which these are cost leadership, differentiation and focus. A cost leader is a company which can produce a similar product more professionally than its competitors. Differentiation happen when a company can produce unique products which earn loyalty from the customer in terms of quality, features and price. In addition, when lower-cost or differentiation strategies are focused on a market niche, they are called cost focus and focused differentiation and Each of these different strategies has its advantages and disadvantages. A company needs to manage its strategy all the time; otherwise it risks being 'stuck in the middle'. To summarize, these days every company must understand the broad affects of impaling effectual strategy that can make sustainable competitive advantage. Competitive strategy aim to establish a profitable and sustainable position against the forces that decide industry competition. Competition is at the core if the success or failure of company.

参考书目-Bibliography

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•Hopper, M. (1990) 'Ratting SABRE - New Ways to Compete on Information,' Harvard Business Review May-Jun (p. 118)
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•Porte