In a software project, some deliverables do not meet specific performance requirements. What should the project manager do?

The correct answer is to review the issues with the project team to address them. When deliverables fail to meet requirements, the project team is best positioned to analyze the root cause of the non-conformance and determine corrective actions. This aligns with the principle of empowering the team to solve problems. Reviewing the requirements traceability matrix at the next meeting is a reactive step that might be part of the solution, but it doesn't immediately address the problem of non-conforming deliverables. Reporting to stakeholders is important for transparency, but the immediate action should be problem-solving, not just reporting. Ensuring deliverables comply with the quality management plan is a proactive measure that should have happened earlier; now the focus is on fixing the current non-compliance.