Estimating Product Backlog Items in Scrum

Who estimates the size of the Product Backlog items?

Which team is responsible for estimating the size of Product Backlog items in Scrum?

Answer:

The size of Product Backlog items in Scrum is estimated by the Development Team.

In the context of Scrum, the responsibility for estimating the size of Product Backlog items typically falls on the Development Team. The Development Team is composed of professionals who are tasked with delivering potentially shippable product increments at the end of each Sprint. Because these team members are the ones who will be doing the work, they possess the necessary knowledge and expertise to provide the most accurate estimations regarding the effort and complexity of the backlog items. Therefore, the correct answer is a. The Development Team.

Furthermore, while the Scrum Master facilitates Scrum events and the Product Owner is responsible for the Product Backlog's content, value, and prioritization, the estimate of the effort required for the items is a collaborative effort within the Development Team. The entire Scrum Team, which includes the Development Team, Scrum Master, and Product Owner, may discuss and clarify the requirements, but the Development Team makes the final estimation.