Distinguish a product bug from a usability gap before fixing it
AI-assisted editorial field note · Educational planning framework
How do I tell a bug from a usability problem?
A bug occurs when behaviour differs from the intended specification. A usability gap occurs when technically intended behaviour prevents users from completing or understanding the task. Both can be serious. The distinction helps you choose a response: repair incorrect behaviour, improve the interaction or revise an unsuitable specification. Do not use 'working as designed' as a reason to ignore a failed task.
Put it into practice
Reproduce the task
Record the user's inputs, environment and expected result. Use a safe example that does not expose private customer information.
Compare the specification
Identify what the product was intended to do. If the specification is unclear, record that uncertainty instead of assigning blame to the user.
Observe the misunderstanding
Ask a new participant to attempt the same task. Watch whether labels, defaults or feedback lead them toward a reasonable but incorrect interpretation.
Validate the fix
Test the original failure and adjacent cases. Confirm that the revised behaviour is both technically correct and understandable in the intended workflow.
A worked example
Illustrative scenario — not a customer case study
An export omits records because a date filter remains active. The filter works as designed, but the interface does not make the scope visible. The repair may be a clear export summary and confirmation, while an export that ignores the documented filter would be a separate implementation bug.
Make the next decision
Classify the cause after reproducing the task. Choose the smallest fix that restores the promised outcome and makes important state visible.
A mistake to avoid
A support explanation can hide repeated design friction. If many people need the same explanation, investigate the interaction instead of writing another response template.
Can one issue be both a bug and a usability gap?
Yes. Incorrect behaviour and confusing feedback can coexist. Track both so an implementation repair does not leave users unable to understand the result.
Take the next step
Check the broader business context with the free six-question assessment. Use your own evidence to choose the next action.
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