Transition requirements should include:

Transition requirements are critical for ensuring that the movement from existing systems to new solutions is smooth and effective. Including an assessment of existing systems is essential because it provides a clear understanding of the current state of affairs, including the strengths and weaknesses of the existing processes and technologies. This assessment helps identify what parts can be leveraged, what need to be changed, and what gaps exist that the new system must address.

By evaluating the current systems, the organization can better plan the transition process, manage risks associated with the change, and ensure that the new solution aligns with the organization's needs. This thorough understanding informs future steps, including training, data migration, and change management strategies, which are fundamental to successful project outcomes.

In contrast, while the other options may be relevant to certain planning aspects of a project, they do not directly pertain to the transition requirements, which specifically focus on the assessment of what is currently in place.