conducting expert reviews using the vimm model
DESCRIPTION
Innovative techniques to make Heuristic Evaluations and Expert Reviews more valuable for business and technical stakeholdersTRANSCRIPT
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Expert ReviewsUsing the VIMM Model to Communicate to Stakeholders
Michael Rawlins, Certified Usability Analyst Presented to the Connecticut Chapter of Usability Professionals
August, 2009
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About me...Michael RawlinsDirector, User Experience, Open Solutions Inc.
•Certified Usability Analyst since 2003•Led UCD teams at major Fortune 100 companies•Performed 100’s of Expert Reviews
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Power of the VIMM Model
3 Credited to Human Factors International
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Definition of VIMMReducing:
Visual Clutter
Intellectual Complexity
Memory load (short & long term)
Motor load (and inconsistency)
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Credited to Human Factors International
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Key takeaways...VIMM is as an organizing principle
VIMM to communicate findings
VIMM helps you establish a common language with a stakeholder (leverage their mental model - their mindset)
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Stakeholder Mindset...
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Stakeholder Need...Data that communicates the level of risk and exposure to business failure
Easy to understand metrics and frameworks that can be trended over time
Their agendas satisfied - often times they are not as interested in learning a discipline like Usability
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Definitions...An Expert Review (ER) is an evaluation of the status of an existing device, application or website. A single reviewer (or team of reviewers) examines the user interface in a very specific context or construct (example: apply a checklist of generally accepted *heuristics)
*Heuristics are “rules of thumb” 8
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ER’s Generate Quick Wins...
Planning tool - evaluate existing web site or application
Establish a common language - when preparing for a major redesign
Support Usability Testing Cycle - identify critical issues
Post-Mortem Tracking Mechanism - post release assessment tool to identify design additional issues
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The typical ERIdentify heuristic violations (severity and impact)
Feature annotated screens illustrating issues
Outline of short & long term recommendations
Action plan, highlighting critical changes for improving application or website
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Simple ERChecklist
Rating Scale
Comments area
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More Structured ER
Credited to Xerox12
Categories
Applicability
Comments
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ER with a set of Heuristics•Structure•Visual Layout•Text•User Interface Metaphor•Information Content•User Assistance•Navigation•Consistency & Standards•Mental Workload•Graphics & Animation•Errors•Feedback•Flexibility & Efficiency•Initial Experience •Accessibility
Credited to IBM13
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Communication is Key...Position ER’s with your stakeholder as a Preventive Measure - an assessment tool that helps mitigate risk of costly usability issues
Provide positive and negative usability issues (always lead with the positive)
Only a diagnostic tool - does not represent actual behaviors of target users
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Innovations...
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Organize with VIMM Model
Credited to Human Factors International16
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Add Scorecards and GraphsScorecards illustrate trends
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7.5
15
22.5
30
20072008
2009StructureDesignLayoutInteraction
Scorecard Credited to Human Factors International17
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Add Impact Matrixes Communicate the risk of not fixing
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Create Action Plans
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Add Risk Assessment
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Rationalizing Findings...
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http://www.measuringusability.com/problem_discovery.php#estp
ER’s cannot be measured unless you
collaborate with multiple reviewers.
Multiple reviewers often results in multiple
findings.This tool helps rationalize.
Credited to Jeff Sauro - Measuring Usability
Planning tool “How many reviewer will it take to find 85% of the problems”
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Justifying Results...
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Increase Predictability: communicate to stakeholders that science is involved
Credited to Jeff Sauro - Measuring Usability
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SummaryStakeholders need evidence that usability issues exist
ER’s capture evidence quickly & effectively
ER’s inspire collaboration with your peers
Innovate ER’s using VIMM model
Present to stakeholders using charts, graphs, to stakeholder support decisions
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Reading...Jacob Nielson and Robert L. Mack (editors), Usability Inspections Methods, John Wiley & Sons, 1994
Wendy Yee, (whitepaper) The Value of an Expert Review and 5-Step Review Checklist, Human Factors International, 2002
Usability toolkit http://www.stcsig.org/usability/resources/toolkit/toolkit.html
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thank you...
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