Overview of different infrastructure contractual models
Being contractual model agnostic is critical to improving the delivery of infrastructure.
The table below provides a menu of infrastructure contractual models, categorised by the ultimate functions the models deliver. These functions cover the main activities to deliver an infrastructure project; design, construction, operations, and maintenance.
Each model has been defined along with identification of alternative variants or names that can relate better with known categories in some jurisdictions.
Finally, it provides a representation for the common aspects within each contractual model but is not considered absolute due to the ways that parts of each model may be combined by the procuring agency.
Collaboration or co-operation are considered pertinent to all models with the contract form influencing these resulting behaviors. This needs to be a procurement agency priority in order to deliver the benefit of working in partnership with the private sector in order to deliver innovation, mitigate risks and deliver reliable outcomes.
Is there a model or variant we’ve missed? Let us know here.
This table has been developed with input from the World Bank and has drawn from definitions of PPPs developed by the World Bank PPIAF and APMG Certification Program.
The contractual models function as classified below are: Build or Construct Only, Design & Build, PPP, Privatisation, and Regulated Asset Base.