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