ITPEC FE Morning October 2021 Question 23
ITPEC FE Morning October 2021 — Question 23 of 80
Usability (ISO 9241-11) — "effectiveness, efficiency, and satisfaction" in a specified context of use.
ISO 9241-11: 2018 defines usability as the extent to which a system, product, or service can be used by specified users to achieve specified goals with:
- Effectiveness — accuracy and completeness of goal achievement
- Efficiency — resources expended relative to results
- Satisfaction — user comfort and acceptability
Why not others:
- (a) Accessibility — ability of people with disabilities to use the system
- (b) Adaptability — system's ability to adjust to different environments
- (c) Availability — proportion of time the system is operational (uptime)
Key rule: The trio "effectiveness, efficiency, satisfaction" = Usability (ISO 9241-11).
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