When can the Product Backlog be updated? (Choose the best answer)

The Product Backlog is a living, dynamic artifact that evolves as the product and the understanding of it evolve. The Product Owner is the sole person responsible for managing the Product Backlog. This accountability includes creating, ordering, and modifying Product Backlog Items to maximize the value of the product resulting from the work of the Scrum Team. This is not an activity restricted to specific events or ceremonies but is an ongoing process. Therefore, the Product Owner can and should update the backlog whenever new information, feedback, or priorities emerge.

A. Updates are a frequent outcome of a Sprint Review, but they are not restricted to occurring only after this event.
B. Product Backlog refinement is an ongoing activity, not an event confined to specific sessions. Updates can happen anytime.
C. This describes a traditional, rigid change control process, which is contrary to the principles of agility and the emergent nature of a Product Backlog.

1. Schwaber, K., & Sutherland, J. (2020). The Scrum Guide. Scrum.org.

Page 6, "Product Owner" section: "The Product Owner is also accountable for effective Product Backlog management..." This establishes the PO's authority.

Page 11, "Product Backlog" section: "The Product Backlog is an emergent, ordered list of what is needed to improve the product." The term "emergent" signifies its constantly evolving nature.

Page 12, "Product Backlog" section: "Product Backlog refinement is the act of breaking down and further defining Product Backlog items... This is an ongoing activity..." This confirms that updates are not tied to a single type of meeting.

2. MIT OpenCourseWare. (2019). 15.S60 Agile Teams, Lecture 2: Scrum. Massachusetts Institute of Technology.

Slide 21, "Product Backlog": Describes the Product Backlog as a "Living document" that is "Continuously updated by Product Owner." This supports the idea that updates can happen at any time at the PO's discretion.