lecture4 - ENSC 304 Human Factors and Usability Engineering...

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ENSC 304 - Human Factors and Usability Engineering Usability Analysis • Read the handout on “… Observing Users” • Assignment 2, part II due March 4, 2008
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ENSC 304 - Human Factors and Usability Engineering Usability Testing --- Two types: Analytic testing without users generally easier and faster generally less effective Empirical • testing with users • much more planning required • effort varies • simple informal tests are fast • experimental testing of very specific issues can be time-consuming
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ENSC 304 - Human Factors and Usability Engineering Heuristic Evaluation • Usability experts review design based on their knowledge of human cognition, general user I/F design guidelines, or set of design heuristics Cognitive Walkthrough: Analyst simulates user’s problem solving process Analyze each step in task scenario on given UI design for usability successes, failures. Especially good for catching problems 1st time users will experience Usability Testing - Analytic Methods
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ENSC 304 - Human Factors and Usability Engineering Guideline Review/Standards Review: Expert in a guideline set or standard (eg MS Windows) checks design for adherence to specs Pluralistic walkthrough: Users, developers and usability experts step through design together based on test task, discussing usability issues as they arise Consistency inspection: UI designer from other project inspects for consistency Usability Testing - Analytic Methods
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ENSC 304 - Human Factors and Usability Engineering HEURISTIC EVALUATION • A small set of (usability experts) goes through a prototype interface design • How many? (See website: 3-5) • They determine if each of its elements follows guidelines established for project • Often use set of Usability Heuristics • Goal: to find usability problems so they can be fixed as part of iterative design
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Usability Heuristics -- Guidelines From Nielsen: - simple, natural dialogue - speak user's language - minimize user memory load - be consistent - provide feedback
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This note was uploaded on 10/07/2009 for the course ENSC 12517 taught by Professor Evangraham during the Spring '08 term at Simon Fraser.

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lecture4 - ENSC 304 Human Factors and Usability Engineering...

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