Risk-driven development with the spiral model

The spiral development model is a risk-driven, iterative, and incremental approach that combines elements of both waterfall and agile methodologies, making it suited for high-risk, complex projects. It emphasizes close collaboration and continuous feedback from customers and stakeholders while maintaining a structured process with phases such as planning, risk analysis, engineering, and evaluation. Each cycle, or "spiral," focuses on addressing specific user requirements and mitigating risks, allowing for continuous improvement of the product. Its iterative nature helps manage uncertainties and adapt to changing market conditions, making it ideal for projects with long development schedules or uncertain requirements. The model has been successfully applied in historical projects like NASA's space shuttle program, showcasing its effectiveness in managing risk and involving stakeholders in the development process.