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  The successful completion of a project is referred to as its "delivery." The "delivery method" describes the structure of the working relationships among the owner, engineer, and contractor(s), in other words, their roles and responsibilities as well as the overall project risk sharing. It is essential that all parties involved combine in a form (delivery method) that allows each to manage the risks for individual and project success.

In addition to the general contractor and prime contractors, other participants can include:

Construction Management

When a project owner uses a number of separate, or "prime" contractors to construct a facility rather than hire a general contractor, and does not have sufficient resources to manage the work, the project owner may hire a construction manager to assist in obtaining bids, manage the construction, and interface with the A/E. This is referred to as the design/bid/build delivery option.

Design/Build

This is an individual or organization that has the capability to both design and construct the facility that the project owner requires, and turn over a facility ready to be operated. A Design/Build Contractor can be referred to as a "Turnkey" contractor or an Engineer/Procure/Construct (EPC) contractor. Often this type of approach is sought in order to accelerate completion of an ambiguous project.

Both reimbursable and "at risk" (fixed price) services are utilized, depending upon the adequacy of scope definition. As scope becomes defined, a reimbursable contract may be converted from reimbursable to fixed price (convertible contract) or guaranteed maximum price. In the design/build method, scope is often presented in terms of facility performance standards, such that further design detail is necessary.



A variation of the above is a Design/Build/Operate contract where the contractor also operates the facility for the owner.