What is a floor plan primarily used for in interior design?

A floor plan is primarily used in interior design as a scaled drawing that provides detailed information about dimensions and the arrangement of rooms. This visual representation of space allows designers to convey how different areas within a building interact with one another and helps to identify how furniture and fixtures will fit into the designated spaces. Floor plans are essential for planning the functionality and flow of a space, ensuring that the design meets both aesthetic and practical needs. They serve as a foundation for further design decisions, such as selecting furnishings and materials, which is crucial for the overall success of an interior project.