Wayfinding is decision architecture
Wayfinding is not the layer of signs added at the end. It is the architecture of decisions: what people need to know, when they need to know it, and how space can remove uncertainty before a sign is required.
Working note
Wayfinding is often reduced to signs.
The more useful definition is broader: wayfinding is the architecture of decisions.
Every journey contains moments of uncertainty. Where do I enter? Which route is mine? What happens next? Am I still moving in the right direction? A sign can answer some of those questions, but good spatial systems try to resolve many of them before signage becomes necessary.
Architecture, sightlines, thresholds, lighting, material change, information hierarchy, naming and digital interfaces all participate in the same decision sequence.
This changes the brief. Instead of asking “where should the signs go?”, the question becomes “where does uncertainty appear, and what is the clearest way to remove it?”
Sometimes the answer is a sign. Sometimes it is a change in geometry, a stronger landmark, a visible destination, a simplified naming system or the removal of information that competes with what matters.
The best wayfinding systems are often the ones people barely notice. The place simply makes sense.