⟩ Explain Is it the job of a business analyst or systems analyst to draw the class diagram?
It depends, it depends, and it depends!
As for most questions in business analysis, there isn?t only one answer. Whose job is to create a class diagram depends on the purpose of the class diagram.
First of all, the question implies that there is only one class diagram for a given project: ?The Class Diagram?. For the most part, this is not the case. On some projects there may be a multitude of class diagrams while in others there may be none.