Due to the complexity of a project the project board a concerned that the business...

 A business analysis checklist is a technique that helps to ensure that all the required business analysis activities and deliverables are completed and verified. A business analysis checklist can include items such as the scope statement, the stakeholder list, the requirements documentation, the traceability matrix, the validation criteria, the change requests, and the approval signatures. A business analysis checklist can help to mitigate the concern of the project board by providing a clear and comprehensive overview of the business analysis work and its quality. A data model is a technique that helps to represent the data and information needs of an organization or a solution using graphical or textual symbols and relationships. A data model can help to define and analyze the data requirements, but it does not ensure that all the requirements are verified. A use case diagram is a technique that helps to depict the interactions between a system and its actors using graphical symbols and relationships. A use case diagram can help to define and analyze the functional requirements, but it does not ensure that all the requirements are verified. A risk register is a technique that helps to identify, analyze, and manage the uncertainties and threats that may affect the project or the solution. A risk register can help to mitigate the potential impacts of the risks, but it does not ensure that all the requirements are verified. References: BABOK Guide v3, Chapter 10: Techniques, Section 10.8: Business Analysis Checklist, p. 504-505; Section 10.18: Data Modelling, p. 522-524; Section 10.50: Use Case Diagram, p. 564-566; Section 10.51: Risk Analysis and Management, p. 567-569.