DZone

Built for enterprise development teams, SAFe was first introduced in the year 2011. Dean Leffingwell was the brain behind it. The framework revolves around agile methodology, lean methodology, and systems thinking.

The said practices were used to manage teams, portfolios, and programs until SAFe 3.0. With the arrival of SAFe 4.0, an additional level, i.e., value streams, is also added to the framework.

Source: DZone