The focus of this thesis is on the acquisition of major capital equipment within Australia's defence system. For the purposes of this analysis, major capital equipment constitute selected projects with a total value of at least $200 million. The projects selected for examination are from each of the three arms of the military service. These projects are: the Royal Australian Air Force's BLACKHAWK helicopters, the Army's PERENTIE vehicles, and the Royal Australian Navy's Australian FFG-7 FRIGATES. These projects were chosen because they share similar planning and management related characteristics. They represent substantial public sector investments. The technology used in each of the systems is available 'off-the-shelf but the way in which the systems were ultimately assembled and produced are uniquely Australian: this adaptation and local innovation involved developmental work. Since each of these projects is almost complete, a comprehensive analysis of the project has been possible. The study of these particular projects provides the basis for a comparative analysis of the acquisition of major defence projects, and facilitates the development of project planning and management 'lessons'. Since current Australian public (and private) sector policies seek to maximise the use of leading edge technology by adapting it to meet specific local requirements; the examination of these three projects provides an objective determination of the validity of such policies.