How does a project brief differ from performance requirements in PDD?

• A. The project brief describes space needs and organization; performance requirements specify measurable targets for quality, safety, energy, accessibility, and regulatory compliance.
• B. The project brief is about budget; performance requirements are about schedule.
• C. The project brief defines construction methods.
• D. The project brief lists vendor contacts.

Answer: (B)

The main point is that the project brief defines what the space and organization must achieve, while performance requirements translate those needs into measurable standards the building must meet. The project brief outlines space needs, types of spaces, their sizes, and how they relate and flow for users. Performance requirements then specify observable targets—quality, safety, energy use, accessibility, and regulatory compliance—that the design and construction must achieve and be able to verify through calculations, testing, and inspections. Budget and schedule live in separate management documents; they aren’t the defining contrast between the brief and performance criteria. So, the correct view is that the brief describes space needs and organization, and performance requirements set measurable targets for how the building should perform in those areas.