The project manager should review the procurement contract to understand the terms and conditions related to quality and defects. Then, the project manager should engage in negotiations with the supplier to find a solution that is agreeable to both parties. This approach aligns with the PMBOK guide's emphasis on procurement management, which includes the processes of planning, conducting, controlling, and closing procurements. It is important to manage procurements effectively to ensure that the project can meet its objectives while maintaining good relationships with suppliers. : Project Procurement Management According to the PMBOK1. A Guide to the Project Management Body of Knowledge (PMBOKGuide)2. Procurement Management: PMP Study Guide (PMBOK 6th Edition)3. Guide to Project Procurement Management4. PMBOK Guide Seventh Edition FAQs5. Defect Management-4 Steps to Better Products & Processes6. 4 Key Takeaways to Reduce Supplier Defects