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Guidance on Usability Principles

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  1. Guidance on Usability Principles Kristen Dergousoff Cmpt 817 Nov 28, 2013

  2. Context of Use • Adds to Usability Engineering: • Better understanding of usability principles. • How to apply principles to systems in development. • How to identify them in existing systems. • Who it can be used by: • System designers. • System developers. • System evaluators.

  3. Analysis • 69 expert evaluations • 64 final exam questions • Analysis and categorizations of YiyanXiong.

  4. Analysis • Chap 4 – Usability Centered Development – Jim A Carter • Most current working definitions of principles from: • 9241-171 • 9241-110 • 9241-12 • 12 principles used in project analysis. • Chap 19 – Usability Centered Development – Jim A. Carter • Breaking principles into guidelines.

  5. Analysis • ISO 9241-110:05(E) • Example of an ISO guideline document. • Formatting/Presentation of ISO guidelines. • Initial guidelines for some principles in the context of dialogues. • JTAG 71 • Goals and questions for guidance on accessibility principles.

  6. Methodology • Principle of Interoperability • Missing from previous student’s work. • Analysed assignment data and added to previous work analysis.

  7. Methodology • Determined which principles were more “visible” and “understood”. • Analysed frequency of usage and correctness. • Why and what does that tell us? • Determined the order for completing project.

  8. Methodology • Examined “Good” and “Bad” examples. • Grouped into categories. • Analyzed for common guidance. • Developed non-ecommerce examples.

  9. Design and Results • Interoperability • Summary • Total Examples: 28 • Good Examples: 13 • Bad Examples: 15 • Topics • Alt Text • Navigation • Built-in options • Software Choices/Conventions • Taken from Widest Range of Users and Equitable Use examples.

  10. Design and Results • Frequency and correctness

  11. Design and Results

  12. Design and Results • How did I ensure usability? • Followed ISO format of guideline documents.

  13. Conclusion and Recommendations • Iterate over wording of guidelines. • Provide additional information found in ISO guideline documents. • Scope • Terms and Definitions • Relationships • Merge with guidelines in 9241-110. • What more can come from analysis of frequency and correctness?