The selection of the Procurement method for major projects often has a significant outcome on the ultimate delivery of a project. The $1.2B Waterview Connection project is the largest and most complex project yet undertaken by the New Zealand Transport Agency and consideration was given to many contract forms. This paper describes the NZTA decision process in adopting the competitive alliance model, and more particularly measures taken during the procurement process to achieve certainty with respect to outcomes and minimize project risks whilst also achieving value for money. Refinements to the procurement process to ensure compliance with the Code of Practice for Risk Management of Tunnel Works prepared by the International Tunnel Insurance Group are described along with the other risk mitigation measures applied to achieve a successful procurement outcome. Also described is the alliance commercial model which serves to both facilitate collaboration between the Contracting consortia and Client to achieve "best for project" outcomes as well as managing commercial risks for all participants.
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