Which statement best describes a performance specification in terms of product selection?

• A. It mandates a single proprietary product
• B. It specifies performance criteria and allows flexible solution options
• C. It prohibits substitutions
• D. It focuses on aesthetics only

Answer: (B)

Performance specifications specify how a product must perform rather than prescribing a specific brand or model. They lay out measurable performance criteria—such as strength, durability, fire resistance, water resistance, or energy performance—and then allow any product that meets those requirements to be used. This gives the design team and contractor flexibility to select among multiple acceptable solutions, promotes competition, and can adapt to changes in available products while still guaranteeing the required outcomes. It’s not about aesthetics, and it doesn’t mandate a single proprietary product or prohibit substitutions; those would be characteristics of a prescriptive or proprietary approach.