In which delivery method does the owner have contracts with both the designer and multiple contractors?

In the context of construction delivery methods, the scenario where the owner has contracts with both the designer and multiple contractors is best represented by the Multiple Prime delivery method. This approach allows the owner to directly engage with and manage several contractors for different aspects of the project, such as excavation, electrical work, plumbing, and general contracting. By doing this, the owner assumes significant control over the construction process and can coordinate various trades according to their schedule and needs.

This method contrasts with other delivery methods, such as Design-Build, where a single entity is responsible for both design and construction, or CM at Risk, where a construction manager acts on behalf of the owner and takes on the risk of project delivery. In the Turnkey method, the contractor is responsible for the entire project from design through construction, providing the owner with a complete ready-to-use facility, thus eliminating the owner's direct contracts with multiple contractors.

The Multiple Prime approach is often used for larger projects where the owner wants more direct control or has specific reasons for splitting contracts among different trades, making it advantageous in situations where the owner values direct relationships and oversight of each contracted aspect of the project.