This article describes a Lean and Scalable Requirements Information Model that extends the basic team‐based agile requirements practices to the needs of the largest, lean‐thinking software enterprise. While fully scalable to all levels of the project, program and portfolio levels, the foundation of the model is a quintessentially lean and agile subset in support of the agile project teams that write and test all the code.
The article goes trough the traditional Portfolio, Program and Project model and describes how Agile organizations achieve the same objectives with an Epic, Features and Stories approach. it also describes how the development of large scale systems is accomplished via multiple teams in a synchronized “Agile Release Train”.