Under the BOO project delivery approach, the design, construction, operation, and maintenance of a facility is the responsibility of the contractor. Under the similar Build-Own-Operate-Transfer (BOOT) approach, asset transfer occurs after a specified operating period when the private provider transfers ownership to a public agency. The major difference between BOO and DBOM, DBFO, BOT, and BOOT approaches is that ownership of the facility remains with the private contractor in the case of the BOO approach. As a result, the potential benefits associated with a BOO approach are that the contractor is assigned all operating revenue risk and any surplus revenues for the life of the facility.