Decomposition in Scrum involves breaking down large items into smaller, more manageable parts. This process helps the Scrum Team to better understand, size, and plan their work. By decomposing larger items, the team can ensure that each piece is sufficiently detailed to be actionable and manageable within a Sprint.
This hierarchical breakdown starts from broad categories like themes and progressively moves towards specific tasks. Each level of decomposition provides a clearer and more detailed understanding of the work needed, facilitating smoother planning and execution within the team.