Which term describes a detailed list of requirements the product must meet, often written as measurable criteria such as size, materials, safety and performance?

• A. Design specification
• B. Design brief
• C. Secondary research
• D. Orthographic drawing

Answer: (A)

A design specification lists the detailed, measurable requirements the product must meet. It translates ideas into concrete targets—dimensions, materials, safety standards, and performance criteria—that guide design decisions and provide a clear way to verify the final product. This makes it the best fit because it sets explicit thresholds that the product must satisfy, so testing and evaluation can be objective. The design brief, while outlining aims and constraints, is broader and less focused on exact measurable criteria. Secondary research involves gathering existing information to inform decisions, and an orthographic drawing is a technical drawing that communicates shape and dimensions, not the requirement checklist itself.