Which of the following is NOT one of the five phases of a design sprint?

The five phases of a design sprint are Understand, Define, Ideate, Prototype, and Test. Each phase serves a specific purpose in the process of rapidly developing and validating concepts.

The phase of "Design" is not one of the five core phases of a design sprint. Instead, the focus is on generating ideas and learning quickly rather than traditional design work. The correct phases emphasize understanding the problem, defining goals, ideating possible solutions, prototyping those ideas swiftly, and then testing them with real users to gather feedback.

In the context of the other phases, "Understand" involves gathering insights about the users and the challenges they face, "Prototype" is about creating a tangible version of the ideas to explore them, and "Test" consists of gathering user feedback on the prototypes. Therefore, any reference to a separate or distinct phase labeled "Design" does not align with the established framework of the design sprint process.