Write difference b/w waterfall model and spiral (agile)model
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Answer Posted / vaishali
The waterfall model is a sequential software development process, in which progress is flowing downwards (like a waterfall) through the phases of Conception, Initiation, Analysis, Design (validation), Construction, Testing and Maintenance.After-the-fact changes are costly.
The spiral model is a software development process combining elements of both design and prototyping-in-stages, in an effort to combine advantages of top-down and bottom-up concepts. The spiral model is intended for large, expensive and complicated projects.
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