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Waterfall model

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Software developement model first proposed in 1970 by W. W. Royce, in which development is supposed to proceed linearly through the phases of requirements analysis, design, implementation, testing (validation), integration and maintenance. The Waterfall Model is considered old-fashioned or simplistic by proponents of object-oriented design which often uses the spiral model instead.

This article (or an earlier version of it) contains material from FOLDOC's article on Waterfall Model, used with permission.

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