A project manager is having trouble getting final acceptance of some deliverables from a stakeholder for reasons outside the project acceptance criteria. What should the project manager do?

The project manager should escalate this issue to the project sponsor because the stakeholder is refusing acceptance for reasons outside the agreed-upon acceptance criteria. This indicates a potential scope or expectation mismatch that requires higher-level intervention. The sponsor has the authority to resolve such conflicts, clarify expectations, or make decisions that impact project scope and stakeholder relationships. Using emotional intelligence might temporarily appease the stakeholder but doesn't address the underlying issue of non-adherence to established criteria. Obtaining acceptance from another stakeholder bypasses the designated approver and could lead to future disputes or invalidate the acceptance process. Creating a waiver without addressing the core problem leaves the deliverable in an unaccepted state, creating unresolved risk and potential rework.