Capital One transitioned to a DevOps model to improve speed of delivery and reduce handoffs between teams. They started with a SWAT team that automated builds, deployments, and infrastructure for two applications. This proved successful and they expanded automation to more applications. Challenges included trying to automate everything at once and handoffs when automation was returned to application teams. Key lessons included focusing on automation, removing handoffs, training application teams on automation, and delivering working solutions incrementally rather than waiting for perfection.