A business analyst has been assigned to Project Y.

 A traceability matrix is a document that the business analyst can use to determine the relationship of each requirement to the business need when working on Project Y. A traceability matrix is a table that shows how each requirement relates to other project artifacts, such as business needs, objectives, deliverables, design elements, test cases, or risks. A traceability matrix can help to ensure that each requirement is aligned with and contributes to the business need that initiated the project. It can also help to verify that each requirement is necessary, feasible, testable, and traceable throughout the project life cycle. A traceability matrix can also help to manage changes and measure progress in relation to the business need. A requirements baseline document is a version of the requirements specification that has been reviewed, approved, and formally established as the basis for further development and delivery of the solution. A requirements baseline document defines the scope of the project and the expected value of the solution. It does not show how each requirement relates to the business need explicitly. A requirements management plan is a document that describes how requirements will be elicited, analyzed, documented, validated, and managed throughout the project. A requirements management plan defines the roles, responsibilities, processes, and tools for managing requirements. It does not indicate the relationship of each requirement to the business need specifically. A requirements package is a document that presents the requirements in a structured and organized way for communication and verification purposes. A requirements package may include different types of requirements, such as functional, non-functional, quality, or transition requirements. It does not demonstrate how each requirement relates to the business need directly. A reliability matrix is not a standard document in business analysis, but it may refer to a tool that measures the reliability or dependability of a system or a process. A reliability matrix evaluates the performance or quality of a solution. It does not determine the relationship of each requirement to the business need. References: PMI Professional in Business Analysis (PMI-PBA)® Examination Content Outline1, page 15; Business Analysis for Practitioners: A Practice Guide2, page 95.