According to the PMBOK Guide, the project manager should document the technical reviews with the new change and obtain formal acceptance from the customer before delivering the project. This is part of the Validate Scope process, which ensures that the project deliverables meet the agreed requirements and specifications. By documenting the technical reviews, the project manager can demonstrate the rationale and benefits of the change, as well as the impact on the project scope, schedule, cost, quality, and risk. By obtaining formal acceptance, the project manager can ensure that the customer is satisfied with the project outcome and avoid any disputes or rework later. References: (Professional in Business Analysis Reference Materials source and documents) PMBOK Guide, 6th edition, Chapter 5, Section 5.5, Validate Scope PMP Exam Prep, 10th edition, Rita Mulcahy, Page 157, Validate Scope