Affordance Audit¶
Audit — instantiates Affordance Shaping
Systematically inventories what an existing environment actually affords, to whom, and where its usable actions diverge from the intended ones.
Affordance Audit is a structured walk through an existing environment that catalogs every action it makes available — reachable, visible, easy, or merely possible — and records who can actually take each one. Its distinguishing move is that it reads the environment as-built rather than as-designed: it separates the actions the designers believe they offer from the actions the substrate actually affords a real, varied population, and marks every gap between the two — the possible-but-invisible, the visible-but-unreachable, the easy-but-wrong. Where its siblings change the environment, the audit only describes it. It is the inventory the rest of the shaping work is planned against.
Example¶
A city rolls out three-stream waste stations — landfill, recycling, compost — in a transit hub, and finds the compost bins full of coffee-cup lids. An Affordance Audit is sent in before anyone redesigns the signage. The auditor stands at the station and records, opening by opening, what each bin affords: the landfill slot is a wide-open rectangle at hand height (affords "toss anything, fast"); the compost slot is the same size and shape, right beside it (affords the identical careless toss); the recycling slot has a round hole a takeaway container won't fit through (visible but unreachable). Each opening is logged against the people streaming past — commuters with full hands, a wheelchair user who can't reach the rear bin, non-English readers for whom the colour code carries all the meaning.
The output is not a fix but a map: "all three openings afford the same fast one-handed toss, so shape and height — not signage — are doing the sorting, and they're sorting wrong; two of the three slots are unreachable for a seated user." That inventory is what tells the team the problem is the identical openings, not the labels — a finding no amount of new signage would have produced.
How it works¶
- Read as-built, not as-designed. Inventory the actions the environment actually offers, ignoring the intended workflow, so invisible, unreachable, and unintended affordances all surface.
- Enumerate against a real population, not an ideal user. Record each affordance's availability separately for the range of agents who meet it, so who-can't is captured alongside who-can.
- Map affordances to the substrate that carries them. Tie each action to the physical or digital feature that affords it, so later shaping knows what to change.
- Flag divergence; don't fix it. Mark every gap between the formal and effective action space and hand it on. The audit stops at the finding.
Tuning parameters¶
- Coverage vs. depth — sweep the whole environment shallowly, or probe a few high-stakes affordances deeply; breadth finds more gaps, depth explains them.
- Population breadth — how many distinct agent types (novice, expert, impaired, adversarial) you audit against; wider catches more exclusion but costs time.
- Expert vs. naïve stance — audit with a heuristic checklist (fast, but sees what it expects) or with a fresh naïve pass (slow, but catches the "obvious" traps insiders have normalised).
- Snapshot vs. change-log — a one-time inventory, or a repeated audit that tracks how the afforded actions drift as the environment is edited.
When it helps, and when it misleads¶
Its strength is that it turns "users keep doing the wrong thing" into a located, itemised account of which feature affords the wrong thing and for whom — the difference between blaming users and finding the slot that's shaped wrong. It is also the only sibling that reliably surfaces affordances nobody designed: the shortcut, the exploit, the thing the environment offers by accident.
Its failure mode is that an audit sees what the auditor's checklist is tuned to see, so it systematically under-reports the affordances that are obvious to a real user but invisible to an expert who has normalised them — the classic gap between perceived and real affordances.[n1] And run backwards, it becomes a rubber stamp: an "audit" performed to bless an environment already shipped rather than to interrogate it. The discipline that guards against both is to audit with at least one genuinely naïve observer, and against the messy real population rather than the designer's imagined user.
How it implements the components¶
Affordance Audit fills the inventory-and-mapping side of the archetype — the diagnostic components that describe the environment before anyone reshapes it:
action_possibility_inventory— its core output: the enumerated list of actions the environment actually affords, intended or not.environment_substrate_map— it ties each afforded action to the physical or digital feature that carries it, mapping the substrate.accessibility_and_heterogeneity_check— it records each affordance's availability across the varied real population, surfacing who is excluded.
It does not define the desired-versus-harmful paths (goal_and_harm_path_definition) — that is Contextual Inquiry or Walkthrough — nor does it change any affordance's friction, signifiers, or boundaries; those shaping components belong to Friction Adjustment, Signifier Prototyping, and Physical or Digital Keying.
Related¶
- Instantiates: Affordance Shaping — the audit supplies the as-built inventory every shaping decision is planned against.
- Sibling mechanisms: Contextual Inquiry or Walkthrough · Physical or Digital Keying · Desire Path Observation · Friction Adjustment · Prototype A/B or Multivariate Test · Task and Capability Analysis · Signifier Prototyping · Robot Action-Space Mapping · Safe Default or Preselected Path · Wayfinding Marker · Usability or Field Test
Editorial Notes¶
Form Classification¶
Form family: Assessment, Review & Assurance
Rationale: The mechanism systematically inventories what an existing environment actually affords, to whom, and where its usable actions diverge from the intended ones, so its operative form is a bounded assessment of existing evidence or work.
Independent corroboration: The frozen evidence defines Affordance Audit as 'Systematically inventories what an existing environment actually affords, to whom, and where its usable actions diverge from the intended ones', so its operative form is Assessment, Review & Assurance.
Review outcome: Independent reviewer agreement; high confidence.
Origin Attribution¶
Primary origin: Human-Computer Interaction
Origin pattern: Convergent development
Present-day reach: Multi-domain
Rationale: Interaction design, following Don Norman, audits real versus perceived actions and whether interface signifiers make intended possibilities discoverable to varied users.
Related originating lineages:
- Architecture & Urban Planning — Universal and environmental design inspect reachability, access, and action possibilities in physical space for differently situated bodies.
- Psychology — J. J. Gibson's ecological psychology originated affordances as action possibilities of an environment relative to an agent.
Review resolution: The systematic as-built usability audit is HCI practice. Ecological psychology originated affordance theory and built-environment accessibility independently developed closely aligned audits; generic engineering validation is not retained as a distinct origin.
Attribution caveat: The concept originated in psychology, but the systematic as-built design audit is most directly an HCI practice.
Review outcome: Reconciled after independent review; high confidence.
Notes¶
The audit reads the environment cold — it sees what the environment offers, never what anyone wants from it. Pair it with Contextual Inquiry or Walkthrough when you also need the agent's goal, otherwise you will have a perfect inventory of affordances with no way to say which ones matter.
[n1] In Gibson's ecology and Norman's design adaptation, an affordance is an action possibility offered by the environment to an agent; Norman further separates a real affordance from a perceived one — what is actually possible versus what the agent believes is possible. An audit is only as good as its ability to see the real affordances an expert has stopped noticing. ↩