Scrum is a simple framework for delivering software products using an empirical approach in which teams deliver value in small increments, inspect the results, and adapt their approach as needed based on feedback. It consists of a small set of events, roles, and artifacts, bound together by practices, and enlivened by values that are the key to making it work.
Nexus extends Scrum to guide multiple Scrum Teams on how they work together to deliver working software in every Sprint. It shows the journey these teams take as they come together, how they share work between teams, and how they manage and minimize dependencies.