In open proprietary specifications, with the concept of requested alternates, what should the architect include?

• A. Requested alternates
• B. Proposed substitutions
• C. Controlled substitutions
• D. No alternates

Answer: (A)

In open proprietary specifications, a mechanism is used to give the owner options that can affect cost and scope without altering the base design. The architect should include a carefully defined set of requested alternates: predefined variations of the work that the owner wants bidders to price so the project can be adjusted during procurement. Each alternate is described clearly, with what changes, how it affects performance or finish, any related requirements, and the estimated or specified cost impact or credit. This allows the contractor to submit base bids plus the alternates, giving the owner the ability to choose combinations or none based on budget or program.

This approach differs from substitutions proposed by bidders, which are substitutions to the base specified products; and from controlled substitutions, which follow a separate approval process. No alternates would eliminate this optionality, which isn’t aligned with the owner’s ability to steer cost.