So much of design is visual. That seems like a rather obvious statement. And yet, GOOD design is accomplished way before demolition even occurs and is not seen. Designers work to ensure that a room fundamentally works before it is even created. The bones of the space are set during this time; a structure of interconnected pieces is placed. Elements and Principles of design are used to determine scale, light, line, balance, and rhythm. A designer gives thought to egress, function, storage, ergonomics and how the senses interpret the space. At this point, selections are made which speak to what is needed to ensure the design is harmonious.
Yes, design is visual. But good design is made such methodically and with great purpose and that is design unseen.