The document discusses using Kanban principles and practices to address portfolio-level problems in organizations. It describes typical portfolio challenges such as having many fixed-date projects with low confidence in meeting dates. It argues that top-down solutions to portfolio problems are often narrow, compliance-driven, and disconnect people from the system. The document then examines how the six Kanban practices of visualizing work, limiting work-in-progress, managing flow, making policies explicit, implementing feedback loops, and improving collaboratively could be applied at the portfolio level by visualizing demand and supply, establishing portfolio constraints, and managing flow and inventory costs across initiatives.