What is the main reason for having just one Product Backlog for multiple Scrum teams?

The main reason for having just one Product Backlog for multiple Scrum teams is to ensure prioritization. A single Product Backlog provides a unified view of all the work needed for the project, allowing the teams to collaborate on prioritizing tasks and features based on the overall goals and objectives of the product. This approach helps in aligning the teams towards the same priorities, which is essential for maximizing the value delivered to stakeholders and avoiding duplication of effort.

By having one Product Backlog, the highest value items can be clearly identified and worked on first by whichever team is best positioned to deliver them. This method enhances communication and transparency across teams, as everyone has access to the same prioritized items. It also ensures that all teams are contributing towards the most important work, rather than working in silos on potentially less impactful tasks.

In contrast, other options like simplifying the process or minimizing documentation do not fully encapsulate the critical reasoning behind maintaining a single Product Backlog. Individual accountability is also maintained, but it is a separate concern and not the primary focus of having a unified backlog. The emphasis on prioritization highlights the agile principles of delivering maximum value through collaborative efforts and adaptive planning.