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Alternative Project Delivery - Texas Water Development Board

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Description of <strong>Project</strong> <strong>Delivery</strong> Methods<br />

the DB proposals. The typical project structure for a DB project is shown in Figure 2-<br />

2.<br />

Figure 2-2<br />

DB <strong>Project</strong> Structure<br />

Customer<br />

Customer Customer Customer Customer Customer<br />

Bonds<br />

Owner<br />

DB Contractor<br />

Design<br />

Engineer<br />

Contractor<br />

Operator<br />

Payment and<br />

Performance Bond<br />

Insurance for Risk<br />

Mitigation<br />

Design<br />

Equipment &<br />

Technology<br />

Construction<br />

Contractor<br />

Startup / Testing<br />

Operation &<br />

Maintenance<br />

The Design Consultant of the DB Contractor prepares a design suitable for<br />

construction based on the Owner’s <strong>Project</strong> Criteria.<br />

Under a DB project delivery, there can be very different levels of interaction during<br />

the design process between the Design Consultant and the Construction<br />

Contractor. In some instances, the Design Consultant may substantively complete<br />

the design with limited input from the Construction Contractor. This tends to occur<br />

in DB projects without lump sum fixed price or guaranteed maximum price contracts.<br />

In other instances, the Construction Contractor may work in an integrated and<br />

iterative manner with the Design Consultant to develop a project that maximizes<br />

constructability, expedites schedule, and minimizes capital cost. This tends to occur in<br />

DB projects with a fixed price contract and allocation of the schedule risk to the DB<br />

Contractor. Owners should consider the DB Contractor's specific approach<br />

carefully as they will obtain the greatest value from an interactive approach of both the<br />

Construction Contractor and the Design Consultant.<br />

In DB Contracting, generally, there is a trade off of Owner control over design details<br />

and project schedule for project cost and/or schedule benefits. Generally, the Design<br />

Consultant has significant discretion under a DB contract regarding the design<br />

details. An Owner should carefully consider the project’s design review and public<br />

involvement process. The DB Contractor also generally has significant discretion<br />

over the project schedule as long as key milestones are met.<br />

B1381-Sect2 R. W. Beck 2-7

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