A subcontractor developed a mobile app that fails to meet new company UI standards. Those standards were not in the SOW. The subcontractor agrees to add the scope only if paid immediately for the extra work. What should the project manager do?

The correct action is to initiate a change request and review the contract. Since the UI standards were not in the Statement of Work (SOW), this is new scope. Any new scope requires a formal change request to be processed, which includes evaluating the impact on cost, schedule, and quality. Reviewing the contract is crucial to understand existing clauses regarding out-of-scope work, payment terms, and dispute resolution before committing to any new payment terms. Negotiating new pricing immediately (option A) is premature without a formal change request and contract review. Denying payment and closing the project (option C) is an extreme measure that doesn't address the root cause and could lead to legal issues. Initiating a contract change for immediate payment (option D) is also premature and bypasses the necessary change control process and contract review.