While each process has its advantages and disadvantages and each is authorized by State law, the benefits of the Construction Manager at Risk method include:
- Retaining the construction manager at an earlier stage of the project so that it can have input on the design details of the construction that it will oversee. This includes constructability reviews of the design and construction scheduling.
- Providing project cost estimates during design development. Gilbane did so at the detailed design phase, the 60% construction document phase, and the 90% construction document phase.
- Allowing an earlier start to site work.
- Establishing a Guaranteed Maximum Price (GMP), which typically happens after all bids have been received and evaluated and which is expected to be set this December if the additional appropriation request is approved at STM (and potentially at the ballot box). Once the GMP is established, the contract manager assumes responsibility for construction cost overruns, including for worked performed by all project subcontractors, thus greatly limiting future risk to the Town.