Software the Agile Way....

Agile is a cultural change that impacts people, processes and tools in different ways across the organization; based on iterative, time boxed and incremental approach , where requirements and solutions evolve through collaboration between self-organizing and cross-functional teams , Agile promotes adaptive planning , evolutionary development and delivery and encourages a rapid and flexible response to change . 

Some of the approaches to scale scrum are mentioned below: - Scaled Agile Framework (SAFe), by Dean Leffingwell; - Disciplined Agile Development (DAD), by Scott Ambler; - Large Scale Scrum (LeSS), by Craig Larman and Bas Vodde. Each has pros and cons and suited for different types of organisations or projects. What's more important is when we implement any practice is to track the impact of the change using hard direct evidence and see if the change is positive or negative. Look at evidence based management  to help track it.