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We know there are number of software development methodologies, e.g. waterfall, agile, RAD, RUP, Sprial, etc

Can anyone explain every model with respective to its strengths against a particular project

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As per My Concern, 

                 The waterfall model is a sequential design process, often used in software development processes, in which progress is seen as flowing steadily downwards (like a waterfall) through the phases of Conception, Initiation, AnalysisDesign, Construction, TestingProduction/Implementation andMaintenance.

 he waterfall development model originates in the manufacturing andconstruction industries: highly structured physical environments in which after-the-fact changes are prohibitively costly, if not impossible. Since no formal software development methodologies existed at the time, this hardware-oriented model was simply adapted for software development.


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