The document discusses lean and agile portfolio management. It notes that companies often develop the wrong features in projects that take too long. It advocates using the same lean principles at the portfolio level as at the agile team level, including having a shared product ownership model across the company. The document outlines four principles for successful portfolio management: understand customer value, understand information flow, keep goals and progress visible, and use simple unified tools. It provides examples of tools that can be used for portfolio management.