This document discusses the concept of LeanUX. It begins by clarifying that LeanUX is not about doing less UX work or being lazy. Rather, it is about minimizing waste and focusing UX efforts on validating product hypotheses through prototypes and customer feedback, rather than extensive documentation. The document provides several examples to illustrate LeanUX principles like developing minimum viable products to test ideas quickly and using metrics and iterative design to continually learn and improve. Overall, the document presents LeanUX as an approach to make UX work more efficient and focused on learning what customers need through early testing and feedback.