Which term describes a model built to test a concept or process?

A prototype is a model specifically designed to test a concept, process, or design before full production or implementation. It allows designers and engineers to explore ideas, identify potential issues, and gather user feedback in a practical way. By creating a prototype, one can evaluate functionality, usability, and performance, making it an essential part of the design process.

In contrast, a mockup typically refers to a visual representation or a static model used primarily for demonstration purposes, focusing on aesthetics rather than testing functionality. Surface modeling and solid modeling refer to specific techniques used in 3D design and CAD software, where surface modeling constructs complex shapes with surfaces, while solid modeling deals with the creation of fully defined three-dimensional objects. These techniques are important for visualization and design, but they do not emphasize the testing of concepts or processes as a prototype does.