Most organizations wait too long to adopt portfolio-level agility practices.Starting at the Portfolio level gives you leverage to impact product-oriented agility.Leaders realize there's a mismatch between portfolio/organizational operating system and team/group delivery approach.Leaner Portfolio Management is about transforming IT portfolio to create a product-oriented mega-lab that drives growth, value, and resilience.The journey to a product-oriented portfolio should cover four stages: Crawl, Walk, Run, and Fly.This journey isn’t about frameworks or processes—it’s about behaviors.It's about establishing flow, reorganizing around value and outcomes and being evidence-informed.Flow-oriented intervention at the portfolio level can improve flow and make change reasonable.Starting at Portfolio level allows managers to learn and model the behaviors expected from their people.Leaner Portfolio Management helps create a balance between technology and business investments.