Extreme Programming (XP) is a discipline of software development with __1____of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any ___2___project that needs to deliver quality software rapidly and flexibly.    An XP project needs a(an) ___3___customer to provide guidance. Customers, programmers, managers, are all working ___4___to build the system that'sneedeD．  Customers - those who have software that needs to be developed - will learn simple,effective ways to___5___what they need, to be sure that they are getting what they need,and to steer the project to success.
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