When multiple Scrum Teams work on the same product, how is their Product Backlog structured?

In a scenario where multiple Scrum Teams are collaborating on the same product, the most effective approach is to have them combine their efforts into one shared Product Backlog. This structure allows for a unified vision of the product, ensuring that all teams are aligned on priorities and that there is a single source of requirements for the product.

Having a shared backlog enhances transparency and collaboration among the teams, as they can clearly see how their work fits into the larger picture and how it impacts other teams. It also facilitates better coordination of cross-team dependencies, which can arise when multiple teams are working on interrelated features or components.

When all teams work from one Product Backlog, it helps maintain consistency in the product's direction, priorities, and delivery. The Scrum Master can also better manage the process and remove impediments when there is one backlog to oversee, resulting in a more cohesive and efficient workflow.

This structural choice ultimately leads to improved communication, prioritization, and delivery of value to stakeholders, aligning all teams toward common goals and objectives.