The term “Portfolio Kanban” is often used to describe the process of managing portfolios of projects and business services using a hierarchy of Kanban boards, to track services at different levels with ease. The hierarchical Kanban boards, each with their appropriate stakeholders, help to visually track status, with easy cues and early signals, providing the relevant level of detail in near real time. It provides an at-a-glance grid view of the portfolio items in a project. Epic Owners are accountable for managing portfolio Epics through the Portfolio Kanban system.  They define the epic, its Minimum Viable Product (MVP), and Lean business case, and when approved, facilitate implementation. If an epic is recognized as the potential delivery item, the Epic Owner works directly with the Agile Release Train (ART) and Solution Train stakeholders to outline the Features and Capabilities that recognize the value. They may also have some responsibility for supporting the initiative as it moves downstream through the Continuous Delivery Pipeline to Release on Demand. Typically, an Epic Owner works with the one or two epics at a time that falls within their area of expertise and current business mission. The only way an Epic Owner is effective is through close collaboration with other entities in the organization.