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Spiral model
open-in-new
<p>The spiral model is a risk-driven <a href="/facts/Software_development_process/cIDtuNPN">software development process</a> model. Based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as <a href="/facts/Iterative_and_incremental_development/wqT31VIC">incremental</a>, <a href="/facts/Waterfall_model/uQGzoBKH">waterfall</a>, or <a href="/facts/Software_prototyping/cLqGURoM">evolutionary prototyping</a>. </p>