Alliance and relationship projects are increasing in number and represent a large pool of work. To be successful relationship style contracts depend on soft-dollar factors, particularly the participants' ability to work together within an agreed framework, generally they are not based on low bid tendering. Participants should be prepared to do business in an open environment based on trust and mutually agreed governance. The research evaluates relationship maintenance in the implementation phase of construction alliances -a particular derivative of relationship style contracts. To determine the factors that contribute to relationship maintenance forty-nine experienced Australian alliance project managers were interviewed. The main findings were; the development of relationships early in the project form building blocks of success from which relationships are maintained and project value added; quality facilitation plays an important part in relationship maintenance and a hybrid organisation created as a result of alliance development overcomes destructive organisational boundaries. Relationship maintenance is integral to alliance project control and failure to formalise it and pay attention to process and past outcomes will undermine an alliance project's potential for success. (Kubal 1994;Allen 1995;Pascale and Sanders 1997;Boyd and Browning 1998). Contemporary research on relationship procurement suggests a focus on win-win solutions, that drive the team toward collaboration rather than adversarial behaviours and a view toward shared and mutually agreed goals that provides underpinning synergies. These terms, whilst not explicit in contract documents developed for alliance projects for example, do form an implicit underpinning theme (Hollingsworth 1988;Hutchinson and Gallagher 2003). Benchmark documents that have captured a change in contracting strategies advocate the use of relationship type strategies (Latham 1994;Egan 1998). These documents, when compared with more recent texts that discuss relationship based procurement, show where enhanced value is provided to project participants in a RC environment (Keniger and Walker 2003). The third factor for a successful alliance is risk allocation and allotted commercial incentives (Scott 1993;Fellows 1998;KPMG Legal 1998). By cooperating, the participants aim to reduce overall project costs, share project risk and reward and increase mutual profits (Allen 1995;Das and Teng 1998;KPMG Legal 1998;Hutchinson and Gallagher 2003;Ross 2003;. Research and practice has shown that relationship style projects are not based on low-bid tendering. Awkward issues such as price and change to the scope are accounted for by participants at the earliest opportunity (Kubal 1994;Allen 1995;Pascale and Sanders 1997;KPMG Legal 1998;Walker, Hampson et al. 2000).These three factors are founded on; trust, cooperative rather than adversarial relationships, collaboration rather than competition, problem solving and innovation rather than sanctions or