What is Spiral Model?
Spiral Model is a SDLC model which is highly used for risk-driven models. Based on the risk patterns of a given project, the spiral model helps developers to increase the efficiency of the model as most risks are already handled. It consists of a number of loops which are forming a spiral shape where each loop is called the phase of the software development cycle.
Phases of Spiral Model
There are mainly four phases of Spiral Model:
- Planning
- Risk Analysis
- Engineering
- Evaluation
Difference between RAD Model and Spiral Model
Rapid Application Development (RAD) model and Spiral Model both are software development life cycle model. The Spiral Model is best for large, complex projects with significant risks, requiring detailed planning and extensive documentation, while the RAD Model focuses on rapid development with easy changes, using smaller teams and minimal planning, suitable for small to medium projects. The Spiral Model prioritizes risk management and high assurance, whereas the RAD Model prioritizes speed and flexibility with lower costs.