The Federal Acquisition Regulation (FAR) 36.203 requires that every Government estimate be
prepared as though the Government were competing for the award. Therefore, all costs that a
prudent and experienced contractor would incur must be included in project cost estimates.
A listing of known facts, construction tasks, and supplemental judgments form the basis of the
estimate at each stage of design. This provides a realistic approach to estimating, and it creates a
history of project cost development.
P100, Facilities Standards for the Public Buildings Service, lists the estimating deliverable
requirements for each design phase, but they are clarified here.
general requirements and principles