Abstract: This paper outlines the development of an analytical methodology for Australia's soldier modernisation program, Project LAND 125 Soldier Combat System (Project WUNDURRA). The methodology utilises a combination of field studies and modelling in what has been termed the Soldier Combat System Battlelab. Aspects of this methodology are discussed including the identification of system variables, development of a hierarchy of performance measures, and the investigation of modelling tools and field trial techniques. Initial impressions of technologies utilised by soldiers during field studies are also given. The paper concludes with a discussion of potential Soldier Combat System enhancement options and an outline of work to be conducted during the next Phase of the Project.