Usability Engineering Method

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Usability Engineering Method

• ? ? ?
• (Namgyu Kim)
• ngkim_at_postech.ac.kr

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Usability Engineering Methods

• Motivation
• work in VE innovative technology
• novel, impressive, natural, good, usable
• usability engineering routine activity
• invention, development, and assessment
• Limitations
• complex inter-dependencies
• users, tasks, input devices, output devices etc
• comprehensive taxonomies

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Approach and Method

• Approach
• sources of inspiration
• VE-related journals and conferences
• HCI related literatures
• visiting, interviews
• WWW search
• Methods for usability engineering of VE P-76,
  P-77
• framework of VE usability characteristics
• supplemental VE usability resources
• specific usability design guidelines
• context-driven discussion
• reference list

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F/W of VE Usability Characteristics

• Frameworks four major areas
• VE users and user tasks
• general user and task characteristics and types
  of tasks in VE
• VE user interface input mechanisms
• usability characteristics of VE input devices
• Virtual model
• usability characteristics of generic components
  typically found in VE
• VE user interface presentation components
• usability characteristics of VE output devices

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Overview of Framework Areas
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Base of Inspiration

• Normans theory of action
• Cognitive Engineering, Chapter 3
• D. A. Norman, S. W. Draper
• Structuring of framework
• Gulf of execution (Execution bridge)
• from goals to physical system
• Gulf of evaluation (Evaluation bridge)
• from physical system to goals
• Goals VE users and user tasks
• Physical system virtual model
• Interface mechanism VE user interface input
  mechanism
• Interface display VE user interface
  presentation components

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Structuring the Framework
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Supplemental VE Usability Resources

• Supplemental VE usability resources
• Specific usability design guidelines
• dos and donts
• currently 19 tables white boxes in framework
• Context-driven discussion
• details of When and Why
• page number (refer to complete framework doc.)
• Reference list
• for more information
• list of all cited references

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Table
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Accessing 1

• Accessing specific usability design guideline
  tables and context driven via the framework of
  usability characteristics

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Accessing 2

• Accessing context-driven discussion and reference
  via usability design guideline tables

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Accessing 3

• Accessing specific usability design guidelines
  and references via context-driven discussion

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Example

• Example VE testbed and design constraints
• military-based, real-time battlefield
  visualization application
• support military command and control operations
• allow users to position a 3D terrain map of a
  strategic region
• provide viewing vantage points to users
• display on Responsive Workbench
• stereoscopic shutter glasses
• isotonic flight-stick equipment

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Step One

• Identifying key features of out specific VE

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Step Two

• Perusing guidelines of relevance
• Framework of VE usability characteristics
• VE users and user tasks
• navigation and locomotion
• VE user interface presentation components
• visual feedback - graphical presentation
• responsive Workbench

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Step Three (1)

• Establishing guideline applicability

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Step Three (2)
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Step Four (1)

• Inferring design implications from applicable
  guidelines

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Step Four (2)
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Step Five

• Applying guidelines in user-centered design
• comparison parameters among design decisions
• evaluating and re-designing versions
• extensive formative evaluation

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Conclusion and Discussion

• Conclusion
• structure for usability characteristics of VE
• comprehensive frameworks
• aggregating and filtering of VE usability-related
  information
• user-based development and evaluation
• Discussion
• create new and re-examine of existing techniques
  for emerging input and output device
• integration techniques multi-modal interaction
• create standards and classification