Spiral Model (OCR A-Level Computer Science): Revision Notes
📚 Revision Notes
Spiral Model
Overview
The Spiral Model combines iterative development with systematic risk assessment, making it suitable for high-risk projects. It progresses through four main phases in a continuous loop.
Key Phases
- Planning: Requirements are gathered, and objectives are defined.
- Risk Analysis: Potential risks are identified and addressed.
- Engineering: Software is developed and tested.
- Evaluation: The current iteration is evaluated with feedback to plan the next cycle.
Benefits
- Risk Management: Proactive risk assessment reduces the likelihood of critical failures.
- Flexibility: Allows for iterative development, accommodating evolving requirements.
- Early Detection of Issues: Risks and issues are identified early, reducing the cost of changes.
Drawbacks
- Complex: The model is complex and requires careful management, which can increase costs.
- Resource Intensive: Risk assessment and multiple iterations can be time-consuming and expensive.
- Not Suitable for Small Projects: Often excessive for smaller, low-risk projects.
Suitable Use Cases
Well-suited for large, high-risk projects, such as those involving new technology or uncertain requirements.