The contractor also works closely with the designer, sharing his or her expertise, to reduce the risk of design errors and the need for redesigns, which can add to project costs and project delays. The contractor has flexibility in selecting the design, materials and construction methods based on the available equipment, work force and resources. The D-B method accelerates project delivery, or shortens the project duration, in several ways. With D-B, DOTs generally have the option of selecting a D-B team based on a best-value basis allowing DOTs to consider other factors beyond lowest price. In the D-B process, a State DOT identifies what it wants constructed, accepts proposals and selects a D-B team to assume the risk and responsibility for the design and construction phases. State DOTs have found that they can accelerate project delivery, lower project costs and improve project quality with an alternative project delivery method: design-build (D-B).
The process, known as design-bid-build (D-B-B), can lead to lengthy project delays because the process must be completed in sequential order and delays can occur from the lack of communication or sharing of expertise between the designer and contractor.
In conventional highway construction projects, there are three phases in which a State Department of Transportation (DOT) creates a design (in-house or with a contractor), opens a bidding process and selects a contractor-usually the one offering the lowest bid-to complete the construction.
0 kommentar(er)
