Final answer:
A team with a stable velocity and a well-refined Product Backlog benefits stakeholders by providing a predictable timeline for the completion of work. This predictability aids in effective planning and resource allocation. It is a key aspect of transparency in Agile and Scrum methodologies.
Step-by-step explanation:
When a team has a stable velocity and refines their Product Backlog, the main stakeholder benefit is that stakeholders will know approximately how long it will take to complete the Backlog. Velocity is a measure of the amount of work a team can complete during a single sprint and is the key to forecasting the completion of future work. By maintaining a consistent velocity, the team provides transparency and predictability which enhances planning, budgeting, and decision-making for stakeholders. When Backlog refinement occurs, it's ensuring that the list of upcoming work is well-understood, prioritized, and estimated with appropriate effort, which directly supports the team's ability to maintain a steady velocity.
On the other hand, being able to compare the team to other teams, verify the team's productivity, or alter the project's goals, milestones, and deliverables are not direct benefits of having a stable velocity and refined Product Backlog, rather they are broader project management actions that require additional context and metrics.