Which statement describes a closed proprietary specification?

Which statement describes a closed proprietary specification?

• A. Names a product by brand and allows substitutions
• B. Names a product by brand and does not allow substitutions
• C. Names no product and uses performance outcomes
• D. Uses reference standards only

Answer: (B)

A closed proprietary specification names a specific product by brand and does not allow substitutions. This approach locks in a single solution, so the contractor must supply exactly that product, ensuring precise compatibility, performance, and warranty alignment with the overall system. It reduces variation and risk of mismatch, which is why the statement describing brand-name product and no substitutions is the best match. If substitutions were allowed, it would be an open or brand-name-with-equal situation, offering flexibility but less control over performance and interfaces. If the spec named no product and relied on performance outcomes, that would be a performance-based specification, focusing on what the system must achieve rather than which product. If only reference standards were used, the spec would be referencing recognized benchmarks without tying to a particular product, which again avoids product-specific commitments.

A closed proprietary specification names a specific product by brand and does not allow substitutions. This approach locks in a single solution, so the contractor must supply exactly that product, ensuring precise compatibility, performance, and warranty alignment with the overall system. It reduces variation and risk of mismatch, which is why the statement describing brand-name product and no substitutions is the best match.

If substitutions were allowed, it would be an open or brand-name-with-equal situation, offering flexibility but less control over performance and interfaces. If the spec named no product and relied on performance outcomes, that would be a performance-based specification, focusing on what the system must achieve rather than which product. If only reference standards were used, the spec would be referencing recognized benchmarks without tying to a particular product, which again avoids product-specific commitments.