Which process prepares negotiation documents under the guidance of an architect?

The process that prepares negotiation documents under the guidance of an architect is negotiation. This stage involves drafting the necessary documentation that outlines the terms and agreements to be discussed with potential contractors or stakeholders. The architect plays a crucial role in this process by providing insights and professional judgment necessary for clarifying project requirements, scope, and other critical factors that will influence the negotiation outcome.

In this phase, the agreement specifics—including pricing, timelines, and deliverables—are articulated in a way that allows for constructive dialogue between the parties involved. The collaborative nature of this process ensures that negotiations are conducted effectively, supported by documentation that reflects both the architect's vision and the project's objectives, facilitating clear communication and understanding.

While the other choices involve stages related to project execution and management, they do not specifically focus on the preparation of negotiation documents guided by the architect, which is why negotiation is the most appropriate answer.