The Provider usually sub-contracts the construction of the project on a fixed-price, fixed-delivery basis. This transfers some or all of the project risk to the subcontractors. Like the Provider, these are typically unincorporated joint ventures , with some or all of the shareholders in common with the Provider. It is also quite common to subcontract O&M of the PPP as well. These subcontractors may be specialist suppliers or, again, SPVs with one or more shareholder in common with the Provider.