Section: Monitoring and Controlling

Explanation
In agile projects, the customer is an integral part of the project team and should be involved in the planning, execution, and review of each iteration. By educating the customer on the agile principles and practices, the project manager can ensure that the customer understands the value of frequent feedback, collaboration, and adaptation. By having the customer participate in daily standup meetings, the project manager can facilitate direct communication between the customer and the development team, and enable quick resolution of any issues or ambiguities regarding the requirements. This will help the project team to deliver the most valuable features to the customer in each sprint. References: PMBOK Guide, 7th edition, pages 55, 56, 57, 58, 59, 60,
61, 62, 63, 64, and 65. World of Project Management.

According to the PMBOK Guide, consensus decision-making is a technique that ensures that all input and ideas from a group or team are considered until a final decision that is acceptable to all emerges. This approach relies heavily on respectful dialogue and open-mindedness, and it is often used to build consensus regarding the requirements in project management. By organizing a face-to-face meeting with all stakeholders, the project manager can facilitate the communication and collaboration among them, and elicit their needs, expectations, and preferences. This can help to resolve any conflicts or contradictions, and reach a common understanding of the project requirements. References:
* PMBOK Guide, Sixth Edition, Chapter 5, Section 5.2.2.4
* How to use Consensus Decision-Making for Project Management by Grace Windsor