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. This early design is then developed, and the architect will usually bring in other design professionals including a structural engineer, sometimes a civil engineer, mechanical, electrical, and plumbing engineers (MEP engineers), a fire protection engineer and often a landscape architect to help complete the construction drawings and technical specifications.