The design-build project delivery method is when the design-builder (typically the contractor) is responsible for both the design and construction of the project. Thus, the responsibility for both the design and construction falls under the same umbrella and, naturally, carries more risk. The discussion below demonstrates risk involved in the design-build project delivery method, particularly in the government contracting arena:

Design-build contracts are common for construction, renovations, and repair projects, where the government provides the contractor with its requirements, but the contractor is free to exercise its ingenuity in achieving that objective or standard of performance and selecting the means to do so. It is not uncommon for issues to arise in design-build contracts. One of the more common issues is when the contract describes a certain requirement, but later during the design process, the contractor will submit in the 35% or 100% design submittal with a lower requirement. The government will unknowingly approve that design, not realizing the contractor may have “slipped in” or made an error on one of the requirements; thus, the approved 100% design has a lower requirement as compared to the contract. In these situations, we have found that the government is justified in demanding the contractor provide the requirements specified in the RFP and resulting contract.

Thus, our long-held rule has been that the government cannot properly be blamed for approving the design when the contractor failed to inform the government that its design deviated from Task Order minimum requirements.

Appeals of - Meltech Corporation, Inc., ASBCA No. 61766, 2025 WL 2166133 (ASBCA 2025) (internal citations omitted).