The American Institute of Architects, or AIA, explains that AIA documents refer to a collection of nearly 200 forms and contracts, which define the relationships and terms involved in design and construction projects. These forms are widely known as the industry standard and have been around for 120 years.
These documents have been prepared by the AIA and have the consensus of owners, contractors, attorneys, architects, engineers and others. Throughout their 120 years of existence, the documents have undergone numerous revisions to adapt to current trends. In order to maintain a consistently high standard, the AIA requires that all revisions abide by certain drafting principles and follow a revision policy.