Estimation is a crucial aspect of project success, requiring a structured, repeatable approach to reduce uncertainty and align with project plans, especially in presales phases. Involving a team of specialists from the start can enhance estimation accuracy, and conducting "lessons learned" meetings after each project phase can help refine future estimates. The Stop, Start, and Continue feedback framework aids in overcoming feedback challenges, while clear guidelines prevent unreliable estimations. Estimation should focus on effort and complexity, without buffers or assumptions about schedules. Effective estimation must consider comprehensive factors such as dependencies and risks, and encourage equal participation from all team members to avoid conformity to dominant opinions. Communicating adjustments during a sprint is essential to prevent performance issues. Agreeing on a Definition of Done (DoD) ensures clarity on task completion, and breaking down scoped activities into smaller components allows for more precise project planning and control.