Explanation
A requirements specification is a document that describes the customer's needs for a product and includes a functional model, a data model, and a glossary of terms. A standard operating manual is a document that provides instructions on how to use a product or service. A business case is a document that justifies the initiation of a project or investment based on its expected benefits and costs. A project charter is a document that authorizes the start of a project and defines its scope, objectives, and stakeholders. References: = PMI Professional in Business Analysis (PMI-PBA)
Examination Content Outline (2019), page 8; Business
Analysis for Practitioners: A Practice Guide (2015), page 36.

Explanation
A requirements traceability matrix is a tool that shows the relationship between each requirement and other project elements, such as objectives, deliverables, test cases, design components, etc. A requirements traceability matrix can help the business analyst to determine the impact for the specific requirement change by showing how the change affects other related requirements and project elements. A requirements traceability matrix can also help to assess the feasibility, scope, value, and risk of the change request. References: = PMI Professional in Business Analysis (PMI-PBA)
Examination Content Outline
(2019), page 10; Business Analysis for Practitioners: A Practice Guide (2015), page 40.

Explanation
According to the PMI Guide to Business Analysis, a requirements traceability matrix is a tool that helps to ensure that the requirements are aligned with the business needs and objectives, and that they are verified and validated throughout the project life cycle. A requirements traceability matrix can also help to identify gaps, redundancies, and inconsistencies in the requirements. If the requirements matrix did not adequately track back to client requirements, it could result in a product that does not meet the client's expectations or specifications, even if it passes the test plan. Therefore, it is important to establish and maintain a clear and accurate traceability of requirements from their source to their implementation and verification. References:
PMI Guide to Business Analysis, page 179-180.