In this version of the Argument we get into Agility, agile delivery, and agile architecture at scale. Scott Ambler is the co-founder of Disciplined Agile (DA), which was acquired by Project Management Institute (PMI) in August 2019. The DA tool kit is the world’s only comprehensive agile body of knowledge (BOK) that provides straightforward and practical guidance to help individuals, teams and enterprises choose their “way of working” in a context-specific way. Together, PMI and DA offer a unique and unparalleled value proposition to stakeholders who are committed to improving their personal, team and enterprise agility. In addition to his work on the DA tool kit, he is the creator of the Agile Modeling (AM) (AgileModeling.com) method and Agile Data (AD) (AgileData.org) methods. He have also (co-)authored several books, including Choose Your WoW!, An Executive's Guide to Disciplined Agile, Disciplined Agile Delivery, Refactoring Databases, Agile Modeling, and The Elements of UML 2.0 Style.