The brand new NEC4 Design Build Operate contract (DBO) allows Clients to procure a more integrated whole-life delivery solution. It reflects the increasing demand for contracts extending into the operational phase.The benefit of the NEC4 DBO contract is that it combines the responsibilities for design, construction, operation and/or maintenance, which can be procured from a single supplier. The DBO contract can therefore include a variety of services during construction and these works are completed.