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There are basically four primary project delivery methods: design-bid-build, at-risk-construction management, design-build, and integrated project delivery. Keep in mind that the functions associated with construction management are required in all four methods even though only one of them is actually named construction management. As I said earlier, this can get a little confusing.

These four project delivery methods differ in five fundamental ways:

 The number of contracts the owner executes

 The relationship and roles of each party to the contract

 The point at which the contractor gets involved in the project

 The ability to overlap design and construction

 Who warrants the sufficiency of the plans and specifications

Regardless of the project delivery method chosen, the three key players—the owner, the designer (architect and/or engineer), and the contractor—are always involved. The traditional roles and responsibilities for the three parties were spelled out in Chapter 1, but keep in mind that the accountabilities and relationships change with the various project delivery methods, as I described in the previous list. And additional players will be added to the project team, usually as subcontracted partners. This will become clearer as you read the individual project delivery descriptions that follow. Each of these methods has specific advantages and disadvantages, and it is the owner's responsibility to assess the project delivery choices in relation to their project needs.