A project manager is leading a national rollout of an innovative product in a regulated, change-prone environment. The PMO needs visibility into regulatory constraints while retaining flexibility. Which tool should the project manager use?

A product backlog is ideal for managing changes in a regulated, change-prone environment because it provides a prioritized, dynamic list of all work to be done, including new features, enhancements, and regulatory compliance items. This allows the project manager to continuously refine and re-prioritize based on new information or regulatory shifts, ensuring flexibility while maintaining visibility. Burndown and burnup charts track progress against a scope but don't inherently manage the changes to that scope. A Kanban board visualizes workflow and improves flow, but a product backlog is specifically designed for managing and prioritizing the evolving list of requirements and changes.