What is the term for a brief representation of design ideas?

The term "Design Brief" refers to a concise document that outlines the objectives, requirements, and constraints of a design project. It serves as a foundational communication tool between clients and designers, providing a clear framework for the creative process. A design brief typically includes essential information such as project goals, target audience, budget, timelines, and any specific design elements or preferences.

In contrast, a "Design Concept" focuses more on the overall ideas and themes behind a design without necessarily outlining the specific details and parameters. "Design Layout" usually refers to the arrangement of visual elements within a design, while a "Design Plan" often encompasses the broader strategy and steps needed to execute a project, which may be informed by the design brief but are more comprehensive in nature. Thus, the design brief stands out as the most succinct representation of design ideas and parameters, making it the correct answer.