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Guidance on Usability Principles

This document presents an in-depth analysis of usability principles, focusing on their application in system development and evaluation. It aims to enhance understanding among system designers, developers, and evaluators by identifying and applying usability principles. Key topics include interoperability, practical examples of good and bad usability practices, and the significance of adhering to ISO guidelines. Through expert evaluations and structured methodologies, the document outlines actionable recommendations for improving user experience in various systems.

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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?

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