Who defines the amount of work to be completed during an iteration?

In Disciplined Agile,the team membersare responsible for defining the amount of work to be completed during an iteration based on their understanding of the team's current capacity. This is aligned with Agile principles that promote self-organizing teams and emphasize the importance of team members making commitments based on their realistic assessment of what they can achieve. This collaborative decision-making process helps to ensure that the team is neither over-committing nor under-utilizing its capacity, leading to sustainable delivery and higher quality outcomes.