Which series of contract documents is used for a CM transitioning from owner's representative to builder?

The correct answer is CM at Risk (CMAR) Series because it specifically addresses a project delivery method where a Construction Manager (CM) assumes a dual role. Initially, the CM acts as the owner’s representative during the design phase, providing input on design, cost estimates, and schedules. This role allows the CM to collaborate closely with the architect and the owner, ensuring that the project aligns with the owner's vision and budget.

Once the design is finalized, the CM transitions into the role of the builder or contractor, taking on the responsibility for the construction process. This transition is facilitated through a series of contract documents that outline the responsibilities, liabilities, and methodologies for project delivery, risk management, and cost control. The CM at Risk model not only allows for this dual role but also emphasizes collaboration and communication throughout both phases of the project, helping to mitigate risks and control costs effectively.

In contrast, other options like the Agency Series and Principal Agent Series typically focus more on roles where the construction manager serves exclusively as an agent for the owner or is primarily involved in the design aspect without assuming a builder's role. The Designer Series might be more aligned with design services and does not pertain to the construction management and building responsibilities inherent in the CMAR approach.