QUIP: Quantitative User Interface Profiling

We introduce a usability evaluation system that provides automatic, quantitative analysis of usage trace data. A problem with existing usability evaluation techniques such as expert evaluation and walk-throughs is that the results are subjective and qualitative. Observational research leads to the most relevant results, but it can be expensive, and analysis of the results is tedious. In the system that we introduce, usage traces are automatically aggregated into a usage profile in which disparities between user and designer conceptual models are exposed graphically.