are the benefits of Design/Build?
Single Point of
Contact and Responsibility:
With both design and construction in the hands
of a single qualified entity, there is a single point of responsibility for
quality, cost, and schedule adherence. The design builder is highly motivated
to deliver a successful project by fulfilling multiple objectives including
aesthetic and functional design, constructability, budget, quality, and
schedule for timely completion. With this delivery method the owner can focus
on project scope and timely decision-making, rather than ongoing coordination
between Designer, Engineer, Architect, and Builder.
The singularized responsibility inherent in Design Build
construction serves as a motivation for quality and proper project
coordination. The owner's requirements and expectations are set early in the
process and it is the Design Build contractors sole responsibility to produce
those results. In traditional project delivery, the owner warrants to the
selected contractor that the project drawings are complete and free from error
and omission. This warranty by the owner results in a restrictive contract and
limited accountability for all parties. In contrast, with design/build
construction, the contractor warrants to the owner that the plans are correct
and designed to meet all expectations. Any design related issues are sorted out
by the contractor.
and construction personnel, working and communicating as one team, evaluate
alternative materials and methods efficiently and accurately. Value engineering
and constructability reviews are utilized continuously and more effectively
when the designers work as an associate to the contractor. Also during the
preconstruction phase, the design builder can reduce the owners administrative
burden by streamlining the RFP and plan approval process. The owner is not
required to spend time and money coordinating and arbitrating between separate
design and construction contracts.
Because the design and construction processes are overlapped, unlike with the
Design-Bid-Build method, total design and construction time can be
significantly reduced. Bidding and redesign periods are eliminated.
Materials/equipment buyout and construction can actually begin before the final
details are completed. The resulting time savings translates into lower cost
and earlier utilization of the facility.
Early Knowledge of
Firm construction costs are known earlier than in other
delivery systems. The entity responsible for the design is simultaneously
estimating construction cost and can accurately conceptualize the completed
project. Staged contracting for design/build services affords the owner with
one or more Go!, No Go! decision points during design. The decision to proceed
with the project is made before substantial design expenditure and with firm
knowledge of the final cost. Knowledge of such costs also assists the owner
with financing and cash flow analysis early in the project.
Additional benefits to this type of project delivery include more hands on
involvement with owner, contractor led permitting, and reduction in unexpected
costs. Program requirements are tested in all phases of construction and
ultimately more project for the money.