Regarding the IPD system, the American Institute of Architects (AIA)
published the first version of “Integrated Project Delivery: A Guide” in 2007. The
paper gives a close look at what IPD is, why it should be used, and what factors
should be considered when using it. Also, it identifies the principles of IPD and
addresses the set up of an integrated project, delivery of an integrated project,
multi-party agreement and delivery model commentary. In the “Delivery Model
Commentary” section, the popular models of delivery, such as design-build and
design-bid-build, were identified along with their inherent challenges of
integration, particular issues for consideration, and potential ways to address
these challenges and issues.