2.1.1 When structuring a PPP deal, it is important to fully understand the key characteristics of the PPP models. To give a comprehensive view of the characteristics of a PPP project, this section will describe the Design-Build-Finance-Operate model. This model involves the private sector in the widest range of services, and hence will give a broader view of the characteristics of PPP. Other PPP models, e.g. DBO, will share the same characteristics.