Final answer:
The Waterfall methodology is a structured design approach that proceeds sequentially from one phase to the next without iteration, unlike the spiral design process.
Step-by-step explanation:
The development methodology that is structured and proceeds in a sequence from one phase to the next is known as the Waterfall methodology. This is in contrast to the spiral design process, which involves iterating through design phases repeatedly to refine the product. In the Waterfall model, phases such as the Preparatory Phase, Implementation and Learning Phase, Program Evaluation Phase, and Development of Lessons Learned occur in a linear sequence without repeating. The team follows a series of steps, potentially including prototyping, testing, and refinement, but these steps are not repeated in a loop as they would be in a spiral design process. This approach can be more predictable in terms of budgeting and timelines compared to the iterative nature of the spiral method, although it may be less adaptable to changes unearthed during the development process.