When an owner selects the Construction Manager as Adviser (CMa) model, the CM does not build anything. The CM advises. That distinction changes everything about how contracts flow, who carries risk, and where coordination responsibilities land.

In a CMa arrangement, the owner enters into separate contracts with each trade contractor (sometimes called multiple prime contracts). The CM, meanwhile, has its own agreement with the owner (AIA C132) and provides guidance on scheduling, budgeting, constructability, and contractor coordination from design through construction. The CM has no financial stake in the construction work itself, which preserves independent judgment. This independence is the defining feature of the model.

The CMa approach introduces a fourth prime player onto the project team. Traditional design-bid-build has three parties: owner, architect, and contractor. Adding an independent construction manager creates a team of four, with the CM providing a dedicated layer of construction expertise without the conflicts that arise when a contractor also manages.

This model gives owners maximum control and transparency. They see every trade contractor's costs directly. They approve every payment individually. The owner can select each trade contractor through competitive bidding or qualifications-based selection. But that control comes with a trade-off: the owner absorbs coordination risk that a general contractor or CM-at-Risk would otherwise carry. When multiple primes are on site, someone has to keep them aligned. That responsibility falls squarely on the owner, with the CM advising but not directing.

For the ARE, you need to distinguish the CMa model from CM-at-Risk (CMc), understand who holds which contracts, and recognize when this delivery approach makes strategic sense for an owner. Questions frequently test whether candidates can identify the correct contractual relationships and risk allocation in each model.