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ReneSpiral model is iterative and allows for gradual development through repeated cycles of planning, designing, building, and testing. Waterfall model, on the other hand, follows a linear sequential approach where each phase must be completed before moving on to the next. Spiral model is more flexible and suitable for projects with high uncertainty, while waterfall model is best for well-understood, stable projects.
"Waterfall model is a document driven process. While spiral model does not requires the document." Is this mentioned anywhere? Because at the end of the last prototyping in spiral modeling, water fall model process ( like detail design, coding, testing, acceptance) is applied, and hence it should also be considered as document driven process. Please comment. Yes I agree that spiral modeling will help client to understand the approximate characteristics of end product and on the basis of which he can rework on the requirements and hence it is suitable for big projects with high risk factor involved.
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