A newly formed development team experienced difficulty with accurately estimating product backlog items. As a result, the team failed to deliver all of the features in the sprint backlog for the past two iterations. What should the team do to improve the accuracy of their estimates?
Show Answer & Explanation
Correct Answer: A. Decrease the sprint time box until the team is able to deliver the entire agreed-upon sprint backlog in a single sprint
In Agile, when a newly formed team struggles with estimation accuracy, the recommended approach is to calibrate through experience and retrospectives — not to arbitrarily shrink the sprint. However, decreasing the sprint timebox so the team can reliably deliver is a valid Agile technique when over-commitment is the root problem, as shorter iterations reduce forecasting uncertainty. Option B is incorrect because the Daily Scrum is reserved strictly for synchronization — discussing estimation techniques there violates its purpose. Option C is incorrect because adding team members (Brooks' Law) typically reduces velocity short-term due to onboarding overhead and communication overhead. Option D is anti-Agile because using estimates as performance metrics discourages honest estimation and psychological safety. The Agile Manifesto and Scrum Guide both emphasize that estimates serve the team, not management evaluation. Newly formed teams are expected to improve velocity over time through inspect-and-adapt cycles. Shorter sprints mean faster feedback loops and better calibration. The team should also use relative sizing (story points, T-shirt sizes) and reference past velocity once established.