PMI Agile Certified Practitioner (PMI-ACP) — Question 330

Two similar stories, A and B, are estimated at 3 story points. Story C, estimated at 8 points. After an iteration in which A and C were completed, it is found that story A took much longer than story C.
What should the agile practitioner do?

Answer options

• A. Assign story B more than 8 story points so to provide a better estimate
• B. Add points to story B's iteration to account for the error but keep story B at 3 points
• C. Assign more resources to story B to bring it in line with the estimate
• D. Re-estimate all stories including values for A, B and C

Correct answer: D

Explanation

The correct answer is D because re-estimating all stories allows the team to adjust their understanding based on actual performance and ensure that estimates are accurate going forward. Options A, B, and C do not address the need for accurate estimates and could perpetuate the existing discrepancies.