What are known as the written instructions for plans?

Specifications are indeed the written instructions for plans in the context of construction and design. They provide detailed descriptions of the materials, workmanship, and quality required for a project, ensuring that the design intent is clear and that all parties involved understand the expectations. Specifications complement drawings and blueprints, which visually represent the project but do not include the necessary written guidelines that create a complete understanding of the project requirements. Thus, specifications play a crucial role in translating design concepts into actionable guidelines.

In contrast, drawings are primarily visual representations, blueprints are a specific type of detailed drawing often used for construction projects that emphasize layout, and manuals typically provide operational instructions or guidelines but are not limited to project specifications. Therefore, it is the specifications that serve as the essential document outlining the standards and detailed requirements needed for effective execution of plans.