A heuristic evaluation examines a product through usability principles such as clear feedback, consistency, error prevention, and support for recognition. Evaluators inspect the experience and explain where the design may create difficulty. They are making informed judgements, rather than observing participants encounter those difficulties.
Nielsen Norman Group’s guide to conducting a heuristic evaluation describes a structured inspection process. It can be useful before a study or during development, particularly when obvious problems would otherwise distract from more uncertain questions.
Inspect a journey with a purpose
Define the audience, tasks, devices, and parts of the product under review. A general inspection of the homepage will miss problems in account recovery, permissions, or error states that only appear during a complete journey.
Evaluators should first inspect independently where practical, then compare and consolidate findings. This preserves different observations before the group starts negotiating a shared account. Familiarity with the domain helps, but it can also make an evaluator overlook terminology that a newcomer would not understand.
In an illustrative application flow, a reviewer might find that selecting “Back” discards earlier answers without warning. The finding should describe the action, the result, the relevant principle, and the likely consequence, with enough detail for someone else to reproduce it.
Prioritise the consequence, not the label
A reference to a heuristic explains why an issue may matter, but it is not a severity rating. Consider whether the problem blocks progress, creates a serious error, affects a frequent task, or leaves an easy route to recovery.
Distinguish directly observable faults from predictions about user behaviour. “The entered address disappears after returning to this step” can be verified by inspection. “Most users will abandon here” requires evidence the inspection does not provide.
Some issues can be corrected immediately; others need usability testing to understand how people actually respond. Ballpark’s website testing can support that follow-up when the implemented experience is ready to examine.
Keep complementary checks in view
A heuristic evaluation does not establish accessibility conformance, although it may reveal related concerns. Accessibility requires appropriate technical assessment and attention to disabled people’s experience.
It also cannot determine whether the product addresses a worthwhile need. A highly usable feature may still solve the wrong problem. Keep the evaluation’s scope clear in the report and connect uncertain findings to the next research activity, so an expert’s useful judgement does not become a substitute for evidence it was never intended to supply.