This document discusses applying agile principles to product development beyond just software. It argues that agile can accelerate tangible product development by modifying agile practices and nesting sprints within milestone frameworks. However, functional managers who are incentivized for their department's success rather than team success often impede agile transformations. Case studies demonstrate how companies have successfully adopted agile practices for consumer electronics, medical devices, and other product development by focusing on high-performance cross-functional teams and frequent demonstrations of working prototypes.