Final answer:
Epic Owners in a Portfolio Kanban system principally collaborate with Business Owners for strategic alignment and System and Solution Architect/Engineering for technical guidance. These collaborations ensure that Epics align with business goals and are technically feasible.
Step-by-step explanation:
In a typical Portfolio Kanban system, Epic Owners collaborate primarily with Business Owners and System and Solution Architect/Engineering roles. Business Owners provide the strategic alignment and they help in making investment decisions, ensuring that the Epics align with the organization's goals. Meanwhile, System and Solution Architects/Engineers help in defining the technical aspects and feasibility of the Epic, ensuring that the solution is architecturally sound and can be effectively integrated into the existing system.
While Product Owners and Release Train Engineers are also integral to the Agile Release Train (ART) and the delivery of value, they are not the primary collaborators with Epic Owners in the context of a Portfolio Kanban system. Scrum Masters primarily facilitate team-level processes and are not directly involved with the portfolio management aspects that Epic Owners engage with.