Scaled agile framework (SAFe) is a framework for scaling agile development within large organizations. It includes principles and tools to implement agile at multiple levels - portfolio, value stream, program, and team. At the portfolio level, SAFe addresses budget, strategy, and governance. The program level works in larger teams called Agile Release Trains of 50-125 people to achieve Program Increment objectives over 5 iterations. Teams within programs work similarly to scrum teams in 2-week iterations. Epics are broken down into features, user stories, and tasks as they move from portfolio to program to team levels. SAFe provides a structure for implementing agile principles across multiple teams in a large organization.