What is an example of an affordance in a system?

An affordance refers to the qualities or properties of an object that allow it to be used effectively, often suggesting its potential uses simply by its design or appearance. In the context of systems, an example of an affordance is a runway allowing planes to land. The runway inherently signifies its function through its physical characteristics – being long, flat, and typically made of materials designed to accommodate the landing of aircraft. These design features directly communicate to pilots that the runway is a safe space for landing, effectively guiding their actions.

In contrast, other options represent more abstract or indirect forms of support rather than direct affordances. For example, a computer interface providing various options can assist users but does not inherently display its usability like the runway does. A manual containing procedural guidelines offers instructions and context but lacks the physical attributes that clearly convey its use. Similarly, a monitoring system tracking performance provides information and insights but does not suggest its use in terms of design or interaction in the same straightforward manner as a runway.