The 2005 DBIA diagram shows the adoption of construction design methods in non-residential design and construction in the United States.  The traditional approach to construction projects is the appointment of a builder on the one hand and the appointment of a contractor on the other. The design construction acquisition route changes the traditional work sequence. It responds to the customer`s wishes to have a single responsibility to reduce overall risks and costs. It is now widely used in many countries and forms of contracts are widespread. Unlike “design-bid-build,” the project is based on a single liability mandate and is used to minimize risks to the project owner and reduce the delivery plan to overlap the design and construction phase of a project. Design construction is sometimes compared to the Master Builder approach, one of the oldest forms of the construction process. Compared to design construction with the traditional procurement method, the authors of the Design-build Contracting Handbook found: “From a historical point of view, the so-called traditional approach is actually a very new term, which has only been used for about 150 years. On the other hand, it has been reported that the concept of design construction – also known as the master builder concept – has been in service for more than four millennia. In addition to projects with tight schedules, design construction is often preferred by federal authorities who must accelerate projects so that roi on investment can be activated earlier. Others have argued that architectural design construction is still doing: Architects who work in this dynamic process understand and maintain the potential of contemporary technology and materials available to builders, and translate what they learn in their design work. This knowledge is not only referred to the specific project, but can be passed on to other project teams, throughout the studio or, more broadly, to the profession, and can become an active source of self-discernment. A single set of integrated contracts, combining design and construction tasks instead of two discrete contracts for each, recognizes the interdependence of architects` project and construction responsibilities and reduces the likelihood of litigation.  Download three free examples of design construction contracts on www.consensusdocs.org/contract_category/designbuild/ During the construction design process, the contractor decides on design issues as well as issues related to costs, gains and timeliness. While the traditional method of building acquisition dissociates designers from the interests of contractors, design construction is not. For these reasons, it is considered that the design-build process is ill-suited to projects requiring complex designs for technical, programmatic or aesthetic purposes. If the designer/architect is “held” by the construction company, he will probably never slip the envelope into the possible. The Belmont Learning Center has been a remarkable construction project, which has been the subject of much criticism, not only for excessive costs, but also for environmental issues.
The scandal involved allegedly contaminated soils, resulting in significant delays and significant cost overruns.  In Los Angeles, District Attorney Steve Cooley, who reviewed the Los Angeles Unified School District Belmont Project, wrote a final investigation report published in March 2003.  This report concluded that the build design process caused a number of problems related to the Belmont scandal: in March 2011, the industry consultant published “Design-Bid-Build meets the opposition” in March 2011.  They suggest that although bid-Build design “still has rules,” the traditional approach loses its sympathy because “alternative methods of project preparation threaten the bid design construction model.” Although the article does not specifically refer to the architect-led design-build approach, the article indicates that D/B already accounts for 27% of