Value is, for the most part, determined by two factors: what it is made up of (its parts) and what it represents (its aesthetics). Take, for example, a chair: a chair is, at its heart, a very basic item and exists for one purpose, sitting; its success at that purpose will vary based on what its parts are and how they fit together. But, because a chair exists for only one purpose, its success at that purpose can only vary so much; because of this, a chair's form is critical in determining its value. Thus, a chair that is very comfortable but ugly and a chair that is uncomfortable but beautiful will both be valuable because function and form are of roughly equivalent importance in the world of chair design.