The study was commissioned by the Design-Build Institute of America (DBIA) and was completed by RSMeans Reed Construction Data Market Intelligence. A study from the US Department of Transportation claims that: "Design-build delivery has been steadily increasing in the U.S. public building sector for more than 10 years, but it is still termed experimental in transportation. To date, under Special Experimental Project 14 (SEP-14) the FHWA has approved the use of design–build in more than 150 projects, representing just over half of the States. The European countries visited have used design–build delivery for a longer time than the United States and provided the scan team with many valuable insights. The primary lessons learned on this scan tour relate to the types of projects utilizing design–build, the use of best-value selection, percentage of design in the solicitation, design and construction administration, third-party risks, the use of warranties, and the addition of maintenance and operation to design–build contracts." During the design–build procedure, the contractor is deciding on design issues as well as issues related to cost, profits and time exigencies. Whilst the traditional method of construction procurement dissociates the designers from the contractors’ interests, design–build does not. On these grounds it is considered that the design–build procedure is poorly adapted to projects that require complex designs for technical, programmatic or aesthetic purposes. If the designer/architect is 'kept' by the construction company, they probably will never push the envelope as to what might be possible. A notable design–build project that received significant criticism, not only for excessive cost but for environmental issues, was the Belmont Learning Center. The scandal involved alleged contaminated soil that caused significant delays and massive cost overruns. In Los Angeles, District Attorney Steve Cooley, who investigated the Los Angeles Unified School District’s Belmont project, produced a final investigative report, released March 2003. This report concluded that the design–build process caused a number of issues relating to the Belmont scandal:   It concluded the “design–build” approach and “mixed-use concept” together caused controversy, uncertainty, and complexity of the Belmont project which helped increase the potential for project failure. While the Belmont investigation cleared the Los Angeles Unified School District of any criminal wrongdoing, the task force recommends strict oversight, including written protocols, a vigorous Office of the Inspector General, and other recommendations if it decides to continue to use the design–build approach.