Constance M' Johnson

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The Life Cycle of Interface Design The Good,
The Bad, and The Ugly

• Constance M. Johnson
• The University of Texas
• Department of Health Informatics

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Kinsys An example of Bad Interface Design

• The Three Pillars of Design Shneiderman, 1998
• Guidelines, Documents and Processes
• Words and icons
• Screen-layout issues
• Input and output devices
• Action sequences
• Training

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The Three Pillars of Design Shneiderman, 1998

• User Interface Software Tools
• Multiple User Interface
• Multiple Platform Support
• Enforce Standards
• Develop prototype
• Engage end-users

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The Three Pillars of Design Shneiderman, 1998

• Usability Testing
• Expert Reviews
• Review of Guidelines
• Consistency checks
• Surveys
• Cognitive Walkthroughs

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Current Menu Screen Kinsys
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Why Did The Interface Design Life Cycle Create An
Ugly Product ?

• Logical User-Centered Design(Kreitzberg, 1996)
• Develop product concept
• High level concept created
• Establish business objectives
• Set up usability design team
• Identify user population
• Identify technical and environmental issues
• Produce a staffing plan

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Logical User-Centered Design Methodology
(Kreitzberg, 1996)

• Perform Research and Need Analysis
• Partition user population
• Break job activities into task units
• Conduct needs analysis
• Sketch process flow
• Identify major objects and structures
• Resolve technical issues

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Logical User-Centered Design Methodology
(Kreitzberg, 1996)

• Design Concepts and Key-Screen Prototype
• Create specific usability objectives
• Initiate guidelines and style
• Select a navigational model
• Identify set of key screens
• Develop a prototype
• Conduct initial reviews and usability tests

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Logical User-Centered Design Methodology
(Kreitzberg, 1996)

• Do Iterative Design and Refinement
• Expand prototype into full system
• Conduct heuristic and expert reviews
• Conduct full-scale usability tests
• Develop prototype and specification

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Logical User-Centered Design Methodology
(Kreitzberg, 1996)

• Implement Software
• Develop standard practices
• Manage late-stage change
• Develop on-line help, documentation, tutorials

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Logical User-Centered Design Methodology
(Kreitzberg, 1996)

• Provide Rollout Support
• Provide training and assistance
• Perform logging, evaluation, maintenance

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How The Interface Design Life Cycle Will Create A
Good Product ?

• Develop product concept
• High level concept created
• Set up usability design team
• Established business objectives through a
  five-step process
• Produce a staffing plan, schedule, budget

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Time-Line for Redesign
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Redesign Life Cycle of Kinsys

• Perform Research and Needs Analysis
• Conduct a complete usability analysis
• User Analysis
• Environmental Analysis
• Task Analysis
• Examine other similar products

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Redesign Life Cycle of Kinsys

• Design Concepts and Key-Screen Prototype
• Use the results usability analysis based upon
  user needs for redesign
• Develop the prototype
• Test the prototype
• GOMS
• Keystroke level Models

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Redesign Life Cycle of Kinsys

• Iterative Design and Refinement
• Small-scale usability studies
• Cognitive Walk-throughs
• Talk Aloud Methods
• Modify Kinys
• Use of results of usability studies
• Comparison of Old Vs. New
• Surveys
• Within subject design

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Redesign Life Cycle of Kinsys

• Implement Software
• Complete any late-stage changes based upon
  usability studies
• Develop on-line help, documentation

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Redesign Life Cycle of Kinsys

• Provide Rollout
• Training
• Evaluation
• Support

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Knowledge should be the guide, not personal
experiencePlato 428 -348 B.C.