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Parts of the SUM: A Case Study of Usability Benchmarking Using the SUM Metric
Erin Bradner, Melissa Dawe
User Experience Professionals' Association International Conference
2009
Abstract
We present real-world lessons learned conducting a usability benchmark on a large, complex software application using the standardized, summated usability metric (SUM). We discuss nuances to the SUM equation and provide insight on key decisions including selecting tasks, setting target metric values, and translating z-scores into percentages when communicating results.
