“…The integration synthesis of the 79 papers treating the inside view and/or complexity as root causes of project delivery risk highlighted three primary cause-effect relationships: The papers summarised under these cause-effect relationships are arranged into Table 2 respectively, where Flyvbjerg's "Challenges-Causes-Cures" framework is employed to further synthesise the literature and draw out common themes. (Antoniadis et al, 2011;Catalão et al, 2019;Geraldi et al, 2011;Grant, 2016;Hetemi et al, 2017;Jolivet and Navarre, 1996;Li et al, 2008;Montealegre and Keil, 2000;Patanakul et al, 2016;Patanakul, 2014;Pich et al, 2002;Sauser et al, 2009;Williams, 2005;Yu et al, 2015) Failure of a range of complex projects, such as IS/IT, major infrastructure, airport baggage handling systems and scientific projects such as NASA's Climate Orbiter project. Exogenous factors, such as economic, political and even climate, are under-represented in research into project overrun, and; Application of reductionist 'best practise' project management methods is ill-suited to the requirements of these socially, politically, structurally and technically complex projects.…”