User experience vs. agile development

This document discusses challenges with integrating user experience design into agile development processes. It describes three attempted models and their shortcomings: 1) Fully agile resulted in piecemeal, inconsistent design. 2) Upfront design was difficult to change and designs went out of date. 3) Post-skinning led to drift from design intent and unnecessary refactoring. It advocates for a "Sprint 0" to define fundamentals before subsequent sprints to balance agile practices with holistic design.