What is defined as any solution-relevant object created during business analysis efforts?

In the context of business analysis, the term that best describes any solution-relevant object created during business analysis efforts is "artifact." Artifacts are tangible outputs that emerge from the analysis process, and they can include documents, models, prototypes, and other items that provide substantial value and insight into the business requirements and solutions.

Artifacts serve as a bridge between stakeholders, facilitating communication and ensuring that everyone has a shared understanding of the project's goals and requirements. They play a crucial role in capturing and documenting the findings from elicitation activities, guiding the development process, and serving as references throughout the project lifecycle.

While the other terms mentioned—such as document, deliverable, and output—may relate to the work generated in business analysis, they do not encompass the broader definition that "artifact" provides. A document is a specific type of artifact, and a deliverable typically represents a completed item that is handed over to a stakeholder, while output is a general term for the results of a process, but does not specifically highlight the relevance to solutions in the same way "artifact" does. Thus, "artifact" is the most comprehensive term fitting the description provided in the question.