Once the Sprint planning is completed it will be presented to the Product Owner.
Sprint Planning Meeting
It Is very important that the Product owner does not pressure the team into committing more than they think is doable. If the team is pressured they will over commit and either not finish or burn themselves out after a couple of sprints.
Many managers are initially concerned that the team might under commit. In reality teams are more likely to over commit.
During a sprint the content and duration do not change.
This enables the team to make and keep their commitments. It gives the team focus and stability during the sprint and it trains the product owner to clearly think through what is on the Product Backlog.
If the goal of a sprint becomes obsolete the Product owner can direct the team to cancel the sprint and start a new one.
In return for not making changes during a sprint the Product owner can makeany change to the Product backlog before the start of the next sprint.