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

The Product Backlog is under the Product Owner’s control and can be updated anytime. The Scrum

Guide states: "The Product Owner is accountable for effective Product Backlog management,"

implying ongoing adjustments as needed.

A: Limiting updates to Sprint Review contradicts its emergent nature.

B: Refinement is a key activity, but updates aren’t restricted to it.

C: A "change request" process isn’t in Scrum.

D: Correct—flexibility is key.

Exact Extract from Scrum Guide: "As long as a product exists, its Product Backlog also exists... The

Product Backlog is dynamic; it constantly changes to identify what the product needs to be

appropriate, competitive, and useful." (Section: "Product Backlog")

Thus, D is correct.

Reference: Scrum Guide (2020), Section: "Product Backlog."