Final answer:
In the spiral life cycle model, functional requirements and design specifications are developed iteratively, allowing for continuous testing, evaluation, and refinement of the product.
Step-by-step explanation:
In the spiral life cycle model, developers use a model to generate functional requirements and physical design specifications simultaneously. The spiral model is distinct in that it allows for iterative refinement and development of a project through repeated cycles. This approach integrates the steps of prototyping, testing, and refinement in an ongoing process, where the development team can continually improve upon the design.
As the design evolves through each spiral or iteration, new insights are gained which can lead to modifications that enhance the final product. This process ensures that the functional requirements are effectively met while also addressing any physical design considerations early on.
Furthermore, through this model, a detailed design is developed which can be put forth in the building of prototypes. These prototypes are then tested and evaluated to reveal any weaknesses or potential improvements, which are then incorporated into the next iteration of the design process. This cycle continues repetitively until the design meets both the desired conditions and quality standards.