What method do Scrum Teams use to size User Stories?

Scrum Teams size User Stories using Relative Estimation, which involves comparing the complexity or effort of one User Story against others. This method allows teams to gauge the size of stories based on their inherent value and difficulty, rather than trying to assign a precise or absolute time value, which can be challenging and lead to inaccuracies.

By using Relative Estimation, teams can collaboratively discuss and assess stories within the context of their project, leading to a better understanding of the work involved. Techniques like Planning Poker often facilitate this process, allowing team members to express their perspectives on the size of stories based on experiences with previous tasks. This collaborative approach helps to achieve consensus, ensuring a more accurate overall estimation.

Unlike other estimation methods, Relative Estimation allows teams to adapt to varying complexities in user stories without being bogged down by the need for exactitude, enabling agile responsiveness to project dynamics.