A team should consider entering into the transition phase when:

The transition phase is a crucial step in the Disciplined Agile framework, as it signifies the point at which the team moves towards implementing new features or products into operational environments. Entering into this phase is particularly pertinent when a new Minimum Business Increment (MBI) has been developed. An MBI is a meaningful increment of value that is ready for deployment and aligns with the strategic goals of the organization.

By focusing on entering the transition phase when a new MBI is available, the team ensures they are ready to deliver tangible value to stakeholders, facilitating a smooth transition into production. This consideration is directly tied to the agile principles of delivering value frequently and responding to change, which outlines the importance of transitioning to operational status once there is a significant increment ready for use.

The other scenarios mentioned do not align as neatly with the criteria for entering the transition phase. While being ready to meet stakeholder expectations, having operational teams prepared, or finalizing an MVP are important in their own contexts, they do not specifically signal readiness to transition in the agile sense. Transitioning is most aligned with the delivery of an MBI, as this increment represents an appreciable amount of business value that can be confidently delivered to users.