Usability Evaluation
Usability evaluation is the process of assessing how effectively, efficiently, and satisfactorily users can interact with a software product.
“A process through which information about the usability of a system is gathered in order to improve the system (known as formative evaluation) or to assess the merit or worth of a system (known as summative evaluation).”
(Definition reproduced from the ISTQB Glossary. Copyright belongs to ISTQB.)
View the complete ISTQB GlossaryWhat is Usability Evaluation?
Evaluation methods include usability testing, expert reviews, inspections, questionnaires, and heuristic evaluations.
User interaction: Focuses on real user experience.
Multiple methods: Combines qualitative and quantitative techniques.
Improvement driven: Identifies usability issues.
Real World Example
A government benefits portal is adding an online application form used by people with different devices, abilities, and assistive technologies.
The feature can pass functional tests while still blocking users who rely on keyboard navigation, screen readers, captions, or sufficient color contrast. Usability evaluation keeps that risk visible.
The tester checks the application path with assistive technology expectations in mind, including labels, focus order, error messages, and completion without a mouse.
The team releases a service that more citizens can actually use because Usability evaluation is treated as a product quality concern, not a cosmetic review.
Practice Questions
Question 1
Which statement BEST describes Usability evaluation in the context of ISTQB terminology?
Question 2
A tester needs to explain Usability evaluation to a non‑technical stakeholder. Which approach is MOST appropriate?
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