In the design process, which step involves creating models or visual representations of the product?

The step that involves creating models or visual representations of the product is prototype. Prototyping is a critical phase in the design process where designers bring their ideas to life through tangible forms, whether they're low-fidelity sketches, wireframes, or high-fidelity interactive models. This step allows designers to explore and experiment with design concepts, providing a physical (or digital) representation that can be tested and iterated upon based on user feedback.

By developing prototypes, designers can effectively communicate their vision and intention behind the product design, making it easier to identify usability issues, enhance user experience, and validate design assumptions before moving forward to more developed stages like testing or final production. The act of prototyping is fundamental as it bridges the gap between ideas and practical implementation, ensuring that the final product aligns with user needs and expectations.