When a key stakeholder expresses dissatisfaction with the deliverables, despite formal acceptance of the quality specifications, the project manager should review the requirements traceability matrix and conduct inspections. This allows for a detailed examination of whether the deliverables meet the agreed-upon quality standards and to identify any discrepancies. The requirements traceability matrix is a tool that links requirements throughout the project lifecycle, ensuring that they are addressed in the final deliverables. Conducting inspections is a method of quality control that helps to verify that the product meets the requirements and standards1.