Which aspect of design focuses on the specific arrangement and interaction of various systems in a building?

Functionality is the aspect of design that emphasizes how different systems within a building are arranged and how they interact with one another. This includes considerations such as the layout of mechanical systems, electrical setups, plumbing, and how these systems work together to create an efficient and effective environment for occupants. A well-designed functional system ensures optimal performance, comfort, and usability within the space.

While aesthetics refers to the visual appeal of a structure and sustainability focuses on environmental impact and resource efficiency, these factors do not directly address the arrangement and interaction of systems. Compliance pertains to meeting legal and regulatory standards, which, while essential, does not specifically address the optimal functional integration of a building's systems. Thus, functionality is a crucial element in ensuring that a building operates efficiently and serves its intended purpose effectively.