Author: Phillip A. Harris
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Waterfall got its name from a metaphor that reflected the process. This was a framework where a concept spilled from the pool of creativity at the top, then flowed down through in-house testing and analysis, to the river of production below.
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In Waterfall, we’d done almost all our research up front. When we got an idea for a product that served a basic function, our subsequent ideas were in service to the product.
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Agile thrived on constant feedback coming from tests run along the way. The test subjects were typical people with typical needs—not lab personnel.