[1] There are three main sequential phases to the design–bid–build delivery method:[2] In this phase, the owner retains an architect (or consulting engineer for infrastructure works) to design and produce bid documents, including construction drawings and technical specifications, on which various general contractors will in turn bid to construct the project.
For building projects, the architect will work with the owner to identify the owner's needs, develop a written program documenting those needs and then produce a conceptual and/or schematic design.
Sub-components include items such as the concrete work, structural steel frame, electrical systems, HVAC, and landscaping.
The owner is not obligated to accept the lowest bid, and it is customary for other factors including past performance and quality of other work to influence the selection process.
During the construction phase the architect also acts as the owner's agent to review the progress of the work as it relates to pay requests from the Contractor, and to issue site instructions, change orders (or field orders), or other documentation necessary to facilitate the construction process and certify that the project is built to the approved construction drawings.