The Spiral Model combines iterative development with elements of the waterfall model and risk analysis.
It involves four phases repeated in cycles:
- Planning: Define objectives, alternatives, and constraints.
- Risk Analysis: Identify and mitigate risks.
- Development: Build and test the system.
- Evaluation: Review progress and plan the next iteration.
Advantages: Flexible, incorporates risk management, and allows for incremental delivery.
Disadvantages: Can be complex and costly to implement.
