You are the Scrum Master for a power generation project.

SBOK establishes a specific exception to the general rule that Sprint scope remains unchanged once implementation begins. If the Scrum Team determines that it has significantly overestimated the effort required and consequently has genuine spare capacity, the team may ask the Product Owner which additional User Stories can be introduced into the current Sprint.

The Sprint Backlog and Sprint Burndown/Burnup information can make this situation visible by showing that work is being completed considerably faster than expected and that meaningful capacity remains.

Option A is insufficient because having highly skilled individuals does not itself authorize scope modification. Option B is also insufficient: one idle member does not necessarily mean the overall Scrum Team has enough capacity to complete another User Story. Option C concerns potential future Change Requests and provides no justification for disturbing the current Sprint.

The exception therefore applies when the team as a whole has overestimated effort and has spare capacity. Even then, the Scrum Team does not unilaterally select new work; it asks the Product Owner which additional prioritized User Story should be included.

Study Guide reference: Change - > Changes to a Sprint - > Exception for Overestimated Effort and Spare Capacity.

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Scrum Master Certified (SMC®) — 100 Questions