Understand the work behind the request
I ask people to walk me through real tasks, including the workarounds they have stopped noticing. This helps uncover the rules and dependencies a feature request may leave out.
On DocFlow, research with methodologists, legal, audit and risk teams informed the structure of the document registry. Jobs-to-be-Done helped clarify what people needed to accomplish. Object-Oriented UX helped me map the documents, versions and relationships the interface had to represent.
That structure gave us a shared basis for discussing navigation, workflows and scope.