This document discusses how to quantify user experience research findings to persuade stakeholders. It provides two case studies: 1) Validating a new website navigation structure using tree testing which found the new structure was 40% better. 2) Measuring expected success of a new concept for Philips' website by testing tasks, satisfaction and goals on prototypes which provided convincing results to support investment. The key takeaways are to use quantitative analyses in design to facilitate objective communication with stakeholders and identify issues before development.