模型 (Prototype) refers to an early sample or model of a product used to test and validate ideas before full-scale production. It allows designers and engineers to explore concepts, identify potential issues, and gather feedback from users. Prototypes can vary in fidelity, from simple sketches to fully functional versions. In various fields, such as software development and industrial design, prototypes play a crucial role in the iterative process. They help teams refine their designs and ensure that the final product meets user needs and expectations. This approach is often associated with methodologies like Agile and Design Thinking.