The document that the business analyst should use to identify the people who can describe the business problem and provide detailed requirements is stakeholder analysis. Stakeholder analysis is a technique that identifies and evaluates the people who have an interest in or influence on a project or initiative. It can help the business analyst understand who are the key stakeholders, what are their roles and responsibilities, what are their needs and expectations, how they communicate and collaborate, etc. A RACI chart is a document that defines and clarifies the roles and responsibilities of different stakeholders in relation to specific tasks or deliverables. It can help the business analyst manage stakeholder expectations and avoid confusion or conflicts. A user story is a document that captures a requirement or feature from an end user’s perspective. It can help the business analyst communicate what needs to be done and why it matters. References: https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/collaboration-with-stakeholders https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/user-stories