Which type of specification provides detailed properties and installation requirements?

A descriptive specification is designed to provide detailed properties and installation requirements for a project. This type of specification outlines the specific materials, components, and systems that must be used, along with their installation methods. By focusing on the exact nature of what is required, descriptive specifications ensure that all parties involved in the project have a clear understanding of what needs to be delivered and how it ought to be implemented. This clarity helps reduce ambiguity and the potential for errors during both procurement and installation phases.

Descriptive specifications typically include precise descriptions of the physical characteristics of materials, dimensions, tolerances, manufacturing processes, and installation procedures. This level of detail can be crucial for ensuring that the final project meets the intended performance and quality standards.

In contrast, performance specifications typically describe the required outcomes or functionalities without specifying how those outcomes should be achieved, leaving more flexibility in terms of material choices and methods. Referential specifications often reference standards or guidelines but do not provide the granular detail needed for installation. Proprietary specifications focus on specific brands or products, which may limit options and innovation while not fully detailing installation requirements. Therefore, the descriptive specification stands out as the most comprehensive approach to defining project requirements.