Solution

The Spiral Model is a software development process that emphasizes iterative development, risk assessment, and continuous refinement. Unlike models that might have lower reliability requirements, the Spiral Model integrates regular risk analysis and assessment in each iteration of the development cycle. This approach helps in identifying potential issues early and ensures that reliability is continuously addressed and improved upon throughout the project. By evaluating and mitigating risks at each spiral (iteration), the model aims to achieve higher reliability and robustness in the final software product. This makes it suitable for high-risk projects where reliability is a critical concern.