Parts of the SUM: a case study of usability benchmarking using the SUM Metric
Erin Bradner, Melissa Dawe · 2008
We present a case study of conducting a usability benchmark on a large, complex software application using a 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.