This answer states that using the INVEST checklist is what the BA should use to assess the quality of a user story for developing a solution to help the marketing department manage leads in Sales Cloud at UC. The INVEST checklist is a set of criteria that helps to evaluate if a user story is well-written and well-defined. The INVEST checklist stands for Independent, Negotiable, Valuable, Estimable, Small, and Testable. Independent means that the user story can be developed and delivered without depending on or affecting other user stories. Negotiable means that the user story can be modified or refined based on feedback or changes in requirements. Valuable means that the user story provides a clear benefit or outcome to the user or the stakeholder. Estimable means that the user story can be estimated in terms of time, effort, or resources needed to complete it. Small means that the user story can be delivered within a short time frame or iteration. Testable means that the user story can be verified or measured against acceptance criteria or tests. Using the INVEST checklist is what the BA should use to assess the quality of a user story because it helps the BA to ensure that the user story is clear, concise, consistent, and complete. References: https://trailhead.salesforce.com/en/content/learn/modules/salesforce-business-analyst-quick-look/use-user-stories-to-capture-requirements