This document provides an overview and summary of changes between CMMI version 1.2 and version 1.3. It discusses changes made to the high maturity levels, including renaming the Organizational Innovation and Deployment process area to Organizational Performance Management. It also summarizes changes made to specific process areas like Supplier Agreement Management and the addition of "Agile boxes" to provide guidance on applying agile approaches. Finally, it introduces the Cynefin framework and explores how the appropriate process control approach depends on the type of work being done.