Final answer:
The design process step that involves modifying and updating a design based on evaluations is known as Redesign, an important part of the iterative spiral design process.
Step-by-step explanation:
The step in the design process that involves reassessing the design specifications, implementing modifications, and updating drawings is known as Redesign. This step comes after the testing and evaluation of prototypes, which may reveal weaknesses or potential improvements in the design. During redesign, the team refines the product to better meet the established criteria and constraints. If the design is found to be unworkable, the process may revert to the concept generation stage. This iterative process is a crucial part of the spiral design process, where each step of prototyping, testing, and refinement could be repeated multiple times to achieve the best possible outcome.