In open proprietary specifications, what is allowed with substitutions?

• A. No substitutions allowed
• B. Substitutions must be processed through standard substitutions procedures
• C. Substitutions allowed from any manufacturer with no procedure
• D. Substitutions not permitted for the basis product

Answer: (B)

In open proprietary specifications, substitutions are allowed, but only through a formal substitution process that is defined in the contract documents. This requirement exists to preserve the project’s performance, interfaces, and warranties while giving the contractor some vendor flexibility.

The basis of design product is identified in open specs, but substitution is permitted if the alternative meets the same criteria and is thoroughly reviewed. Substitution requests are submitted with product data, performance claims, and any necessary testing or certifications, and the architect or engineer reviews them to confirm compatibility with other systems and the overall design intent. This review ensures that a substitute does not compromise code compliance, interfaces, or warranty obligations and that it aligns with the project schedule and cost.

That’s why processing substitutions through standard substitutions procedures is the best answer: it provides the required evaluation, documentation, and coordination to maintain project integrity. Substitutions without any procedure would bypass essential checks, and forbidding substitutions or forbidding changes to the basis product would ignore the reality of open specifications.