1 Usability Testing John Sorflaten , PhD Certified Professional Ergonomist (CPE) Certified Usability Analyst (CUA) “Midwife to successful web and application design” User testing, analysis, strategy, eCommerce, mobile apps User Experience Works http://www.linkedin.com/in/johnsorflaten (see SlideShare) www.userexperienceworks.com
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Getting ROI Numbers from Usability TestingJohn Sorflaten , PhDCertified Professional Ergonomist (CPE)Certified Usability Analyst (CUA)
“Midwife to successful web and application design”User testing, analysis, strategy, eCommerce, mobile apps
User Experience Workshttp://www.linkedin.com/in/johnsorflaten (see SlideShare)www.userexperienceworks.com www.iphoneroi.com 641-455-1873
Final Report: Satisfaction The test of the High Point Quote
application with 18 participants (and 17 results on the SUS) resulted in an average score of 79.7.
This compares very well with the 81.2 score that represents the 90th percentile. We conclude that the application created a very good feeling of “usability” in our test participants.
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Final Report: Success Rate
All 18 participants successfully completing the main task.
This implies that we can have 97.32% confidence of meeting our target that 85% of people like our participants will succeed.
We can also say that we have a 95% chance that at least 88% can do the task.
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http://www.measuringusability.com/onep.php
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Converting UT Results to Business Measures
Efficiency (time-on-task) (DONE!) Effectiveness (task success rates) (DONE) Satisfaction (subjective ratings) (DONE) Learning (time to learn) (See time-on-task) Errors (See time-on-task)
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UT Results in Business Terms
What percent of visitors can do the task? Our income depends on your prediction! Use estimates like….
95% confidence that 88% of end-users can do it!
60% chance that 85% can do it (uhmmmm) 95% chance that 60% of end-users can do it… ! Goforit…