A project delivery model which has gained popularity in recent years is the alliance, in which parties with complementary skills and resources undertake to work co-operatively to achieve agreed outcomes on the basis of good faith and trust. Alliances can be used for developing single projects, for ongoing capital works programs, and for the provision of services. There are no standard forms of alliance agreement and many variants on the theme exist, some more accurately describing themselves as ‘alliances’ than others.