Iteration planning should be finalized before the start of the iteration to ensure that the team has a clear understanding of the tasks and goals for the upcoming period. To summarize, iteration planning is a crucial step that must be completed before the iteration begins. This ensures that the team is well-prepared and aligned with the objectives and tasks for the upcoming cycle. It is essential to finalize iteration planning in advance to provide clarity and direction, allowing the team to work efficiently and effectively towards their goals.