usability
Let an agent explain usability, relay definitions, evaluation methods and metrics from human-computer interaction and standards sources, describe the named applications and flag misfiled engineering aliases, and distinguish usability from accessibility, user experience, utility and structural serviceability.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain usability, relay definitions, evaluation methods and metrics from human-computer interaction and standards sources, describe the named applications and flag misfiled engineering aliases, and distinguish usability from accessibility, user experience, utility and structural serviceability.
The extent to which a product, system or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use, as defined in ISO 9241-11, assessed through usability testing, heuristic evaluation and metrics such as the System Usability Scale, and applied to web usability and software such as machine translation tools; the registry aliases also name serviceability, which in engineering means ease of maintenance or fitness for use, and the Serviceability Limit State, a structural engineering criterion for deflection and cracking under normal loads, which are different concepts and appear misfiled. Usability overlaps with but differs from accessibility and user experience.
What it is for: Assessing how well people can use things.
It can be explain definitions and standards; relay evaluation methods; describe applications; flag misfiled aliases.
Distinguishing features
Context-dependent
Measured with users
Three core components
Iterative design practice
What it looks like
Not a physical object; observed in user tests, heuristics and survey scores.
Physical character
ISO 9241-11: 1998, revised 2018 standard
System Usability Scale: 1986 year - John Brooke, 10 items
Nielsen usability heuristics: 1990, refined 1994 note
How it is recognised
Effectiveness, efficiency and satisfaction in use
Web usability, serviceability, machine translation software usability, Serviceability Limit State
Accessibility covers people with disabilities; user experience is broader; utility is whether features meet needs; serviceability limit state is a structural criterion
Related models
is a kind of - in registry terms
is defined in -
is contrasted with -
is contrasted with - misfiled engineering alias
In practice
Families and kinds
web usability
software usability
product usability
usability of translation tools
Standards and regulation
ISO 9241-11 and ISO 9241-210
ISO/IEC 25010 product quality model
Eurocode serviceability limit states for the misfiled alias
Failure modes and hazards
Designs that cause user errors in safety-critical systems
Confusing usability with accessibility
Misfiled engineering aliases
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What usability is.
Definition.
Definition
Definition.
Definition
Definition.
- What is usability, and how does it differ from accessibility, user experience, utility and structural serviceability? definition
- Is the question about software, products, or structural engineering serviceability? boundary
Aliases
Named aliases.
Aliases
Aliases.
- What are web usability and translation tool usability, and why are serviceability and the Serviceability Limit State different? definition
- Which entry fits the specific concept? action
Evaluation Evaluation methods.
Sources.
Testing
Usability testing.
Testing
Testing.
- How is usability testing run with representative users? provenance
- Which references are standard? provenance
Heuristics
Heuristic evaluation.
Heuristics
Heuristics.
- What are Nielsen s heuristics and how are they applied? provenance
- Which sources are cited? provenance
Metrics Metrics.
Science.
SUS
System Usability Scale.
SUS
SUS.
- How is the System Usability Scale scored? measurement
- Which entry fits System Usability Scale? action
Task metrics
Task metrics.
Task metrics
Task metrics.
- How are completion rate, time on task and error rate measured? measurement
- Is the information accurate? boundary
Context Related fields.
Attribution.
Accessibility
Accessibility.
Accessibility
Accessibility.
- How do usability and accessibility standards such as WCAG relate? provenance
- Which entry fits Web Content Accessibility Guidelines? action
Serviceability
Structural serviceability.
Serviceability
Serviceability.
- What is the serviceability limit state in structural design? provenance
- Which entry fits limit state design? action
What the second pass must settle
- The registry aliases serviceability and Serviceability Limit State should be moved to engineering entries
- Should web usability be a separate entry?
- How should usability metrics be linked?