Civil Engineering Reference
In-Depth Information
Table 5-1. Characteristics to review when considering DB delivery for a project
Characteristic
Desirable Conditions for DB
Scope
Clearly defined, including facilities and interfaces with other
existing infrastructure
Performance
Requirements
Clearly defined, including inputs and desired outputs, reliability,
quality, and maintainability
Permitting
No significant barriers to obtaining permits for the project
Right-of-Way or Land
Acquisition
No significant right-of-way or land acquisition issues that would
delay the project
Site Conditions
No known site conditions that would delay the project, such
as known hazardous materials, unstable soils conditions, or
major subterranean issues
Environmental
Conditions
No critical environmental conditions that would stop the project,
such as endangered species or historical or cultural artifacts.
Community
Circumstances
No serious community circumstances that would delay or stop
the project
Legal
No legal barriers that would prevent procuring or completing
the project through DB
If these characteristics do not reveal any major risk issues or the owner concludes that
any issues identified can be effectively managed, there should not be any significant con-
straints to successfully performing the project through DB project delivery. If there are
major constraints that must be addressed by the owner through development of a detailed
design prior to contracting for construction, DB may not be a suitable approach to meet
the owner's needs.
SELECTING DESIGN-BUILD DELIVERY FOR A PROJECT
All projects differ from one another, and each owner has a unique set of circumstances
and preferences. Having a thorough understanding of the owner's organization and objec-
tives is the best foundation from which to begin evaluation of delivery methods.
Many owners believe that projects with specific performance requirements, such as
the required use of specialized treatment processes, production or flow requirements,
and/or operational reliability measures, are the best candidates for DB. This belief is
based on the benefit of having performance risk transferred to the design-builder (DBIA
2008), who can use innovative and integrated engineering and construction solutions to
achieve those performance requirements.
Some owners prefer DBB or construction management at risk (CMAR) for projects
that contain numerous interfaces with existing infrastucture and any other operating
facilities and systems because those delivery methods give the owners more control of the
design details and construction sequencing of the project. Other owners find those types
of projects to be great candidates for DB because they believe those complexities are best
managed by the DB team in collaboration with the owner's operation staff.
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