Practice an Accessibility Bug Triage Interview
Triage accessibility bugs through task impact, reproducible barriers, behavioural fixes and verification across shared components.
TL;DR
- In this fictional accessibility-triage exercise, prioritize the user task that is blocked rather than counting defects.
- Reproduce each behavior, explain the priority, and specify the observable fix.
- Test the shared component and consumers with appropriate automated checks and manual interaction.
Triage the blocked task
In this fictional interview, an accessibility audit produces three reports: a checkout dialog traps keyboard focus, a form error is not announced clearly, and a decorative icon has an inconsistent description. The interviewer asks what to fix first with limited engineering time.
Begin with the affected user task and the evidence in each report. Do not rank issues only by how visible they are to a mouse user or by the number of lines in the fix. A small-looking control can block an essential workflow.
Clarify the scope and severity rather than assuming the short labels tell the whole story. Does the dialog prevent completing checkout or leaving the overlay? Can the form error be located by another reliable method? Is the icon truly decorative in every context? The answers inform the decision.
Reproduce with a clear procedure
For each report, record the page state, input method, steps and observed barrier. Include the relevant browser and assistive technology where applicable. A screenshot alone cannot demonstrate keyboard navigation or announcement behaviour.
| Finding | Task impact to investigate | Verification focus |
|---|---|---|
| Dialog focus problem | User cannot complete or exit a flow | Entry, movement, close and return focus |
| Unclear form error | User cannot identify or correct input | Error identification and association |
| Decorative icon description | Repeated or misleading information | Actual semantic purpose |
The W3C preliminary accessibility checks provide useful starting points while explicitly treating a first review as limited. Passing a short checklist is not proof that the entire product is accessible. Use the exercise to identify the next test, not to claim comprehensive conformance.
Explain the priority decision
For the fictional scenario, a reproducible checkout blocker is a strong candidate for immediate attention because it prevents a core task. State the reasoning and any uncertainty. Do not imply that the other issues are unimportant or that a rarely used flow is automatically safe to ignore.
Consider reach, task criticality, available alternatives and the risk of the proposed change. A shared component may spread the same barrier across many pages. Conversely, a quick local patch could leave the underlying component broken elsewhere.
Ask whether a temporary workaround is genuinely usable by affected users. “Use a mouse” is not a meaningful keyboard-accessibility workaround. “Contact support” may impose a delay or exclude people outside support hours. Describe the limitations honestly if a temporary path is necessary.
Define the fix as behaviour
For the dialog, specify what should happen when it opens, how focus moves, how the user closes it and where focus returns. The exact implementation must fit the dialog's semantics and the product flow. Adding an attribute without testing behaviour may not resolve the barrier.
For the form, describe how the user discovers the error, identifies the relevant field and understands the correction. A colour change alone may not supply enough information. Check that existing input and context are preserved so the person does not have to reconstruct the entire task after an error.
Write acceptance criteria in terms of completing the workflow. This keeps the discussion connected to users instead of treating accessibility as a set of disconnected markup edits.
Test the shared component and its consumers
After a component change, revisit the original reproduction and representative uses elsewhere. A focus-management fix in one dialog could disrupt another that opens from a different trigger. A form-level announcement might become repetitive when several fields update together.
Use automated checks for the problems they can detect and manual interaction for the behaviour they cannot fully establish. Do not frame these methods as competing alternatives. The purpose is evidence about the actual barrier.
Include affected users or knowledgeable accessibility reviewers where practical, with a respectful, defined task and appropriate arrangements. Their feedback can reveal assumptions that a developer's own interaction misses. It should not be reduced to asking one person to certify the whole product.
Keep the original issue open until the agreed behaviour is verified, rather than treating a merged patch as proof that the user barrier has disappeared.
Rehearse a changed constraint
Have a practice partner reveal that the checkout dialog is a shared third-party component with a slow release cycle. Explain the options: a safe local adaptation, a different supported flow, a vendor report and a planned durable fix. Evaluate maintenance and regression risks instead of choosing a workaround solely because it is fastest to code.
Our system design preparation guide can help you connect user requirements with system boundaries. Use the mock interview strategy to practise a concise triage explanation.
End with the first fix, its behavioural acceptance criteria and a follow-up plan for the remaining findings. A strong answer prioritises a concrete barrier, preserves the evidence and verifies the complete task. It does not turn a small successful repair into an unsupported claim of universal accessibility.