In iteration-based agile, the Product Owner often works with the team to prepare some stories for the upcoming iteration during one or more sessions in the middle of the current iteration. There is no consensus on how long the refinement should be. The refinement might be determined by: Group of answer choices After-the-fact development of a story during the current iteration Identification of new stories identified at the midway through a 2-week sprint The roadmap based on what the team is scheduled to produce Product owner presentation of story ideas to the team for the team to learn about potential challenges or opportunities in the stories