Public Private Partnership (PPP), with its different applications, is found to be an especially interesting solution in large scale infrastructure and building operations. Earlier, a large number of infrastructure activities were owned, managed and financed by the public sector. A market change in thinking and practice has replaced the consensus that infrastructure has to be provided by government-owned enterprises. Questions of ownership, financing and risk-sharing between public and private parties are crucial to address. (Grimsey & Lewis 2004: 27; Evans & Bowman 2005: 62, 67.) These models involve technical solutions, but it has to be considered how they serve public interests.