The Product Backlog is a dynamic, prioritized list of all tasks, features, and requirements needed to develop and improve a product. Unlike a traditional to-do list, the Product Backlog is never "complete" — it requires ongoing refinement as the product and market needs change.

2 Key Aspects (Ownership & Accountability):

• The Product Owner (PO) has sole ownership of the Product Backlog and is fully accountable for its maintenance, prioritization, and organization.
• Anyone can write/create Product Backlog Items. An effective PO collaborates with stakeholders (developers, designers, customers) to refine the backlog and maximize product value

Collaboration & Contributions:

While the PO owns the backlog, input from the Scrum Team, Scrum Master, and stakeholders ensures a well-rounded and comprehensive list. Cross-functional team members may also suggest or contribute items, but the PO has the final say on prioritization and inclusion. This aligns with Scrum's principles of transparency and collaboration.

The Sprint Backlog is the Developers' exclusive responsibility and can only be modified by them during the Sprint. Even if the Product Owner requests changes to the planned work, these must go through the Developers' approval process.

As the tactical plan for the Sprint, the Sprint Backlog is created by the Developers during Sprint Planning. This collaborative process involves:

1. The Product Owner presenting prioritized Product Backlog items.
2. The Developers:
   • Evaluating the items
   • Assessing capacity
   • Determining achievable work
   • Formulating an execution plan

The resulting Sprint Backlog serves as the team's blueprint for accomplishing the Sprint Goal.