Which method of specification writing focuses on performance criteria rather than specific materials?

The method of specification writing that focuses on performance criteria rather than specific materials is the performance specification. This approach emphasizes the desired outcomes and functions of the materials or systems rather than dictating the exact products to be used. The performance specification allows for flexibility in achieving the required standards, enabling designers and contractors to select materials and methods that meet or exceed those criteria. By focusing on performance, this method encourages innovation and adaptability, allowing for a wider range of solutions and the potential for new technologies to be utilized in construction projects.

In contrast, other specification writing methods, such as prescriptive specifications, typically provide detailed descriptions of materials and construction methods, which can limit options. Proprietary specifications often mandate specific brands or products, thereby reducing the flexibility in material selection. General standards, while useful, do not specifically address performance outcomes like a performance specification does.