“A property in which the physical characteristics of an object or environment influence its function.â€
Some objects are more suited for some functions than others. Round wheels are better suited than square wheels for rolling. Therefore, round wheels are said to better afford rolling. This doesn´t mean that the square wheels cannot be rolled, rather that their physical characteristics influence the way they function and are likely to be used.
When the affordance of an object corresponds with its intended function, the design will perform more efficiently and will be easier to understand. Conversely, when the affordance of an object conflicts with its intended function, the design will perform less efficiently and be more difficult to use.
