Specifying the exact product brands to be used falls under which method of specification writing?

Specifying exact product brands in construction documentation clearly indicates a proprietary method of specification writing. This method involves naming specific manufacturers or products that must be used in the project. By using proprietary specifications, the architect defines the quality, style, and functional characteristics of a particular product or material, thus ensuring that the end result aligns with their design intent.

This approach can streamline the selection process for contractors and provide design consistency throughout the project. It also minimizes ambiguity and can simplify construction, as the contractor is directed to use specific products, which can help maintain desired aesthetics and performance standards.

In contrast, other specification methods like performance, prescriptive, and descriptive do not focus on particular brands. Performance specifications outline the required outcomes or functions of products without naming specific brands. Prescriptive specifications detail the processes and materials to be used but do not specify individual brands. Descriptive specifications describe the characteristics and features of products but again do not tie the specification to any named manufacturer.