The design-build project delivery system, which dates back to the master builders of ancient Greece, continues to gain in popularity. The appeal of design-build is that it provides the project owner with a single point of contact for both design and construction. This can lead to both lower costs and compressed construction schedules.
A recent study by the Federal Highway Administration determined that on average, design-build projects were completed 14% faster than traditional design-bid-build projects. Design-build projects, however, expose contractors to risks that they don't have under the traditional delivery method. The additional exposure arises out of what is known as the Spearin Doctrine.