These contracts typically are variations on a fixed price contract with the most common form as a "fixed price incentive" contract. In this approach, the buyer (in this case, the city of Baltimore) provides a statement that specifies what is desired as an outcome but does not cite specific lower-level details about how the end outcome is to be achieved. This enables the contractor to move from a compliance behavior to a more innovative approach while still ensuring that the end product will be fully compliant with all construction code, safety and related requirements. The contractor bids a fixed price which ensures they will have done due diligence to include all potential contingencies in their bid. Since there will still be "unknown unknowns," there is a cost target component in the contract, above the fixed price component, and a share ratio is negotiated in which both the contractor and the city share any cost overruns, but also benefit from any cost underruns of the cost target. The share ratio is negotiated, but for simplicity it could be 50-50, which means that if the project exceeds the cost target, the contractor and the city each pay half of the cost overrun.