The Developers determine how many product backlog items they select for a sprint. During sprint planning, the Developers assess their capacity, the complexity of tasks, and their past performance to make an informed decision about what they can realistically complete within the sprint timeframe. The Product Owner prioritizes the backlog and proposes goals, but the actual selection and commitment to the number of items rest with the Developers, reflecting Scrum's principle of team self-management and autonomy. The Scrum Master facilitates the process but does not decide the quantity of backlog items for the sprint. This approach ensures realistic planning and commitment based on the team's capability.
