Turner and Cochrane (1993) state that the time–budget–requirements definition of project success is solely directed at the interests of the vendor or supplier. Some years earlier, De Wit (1988) already stressed the importance of including various stakeholders’ perspectives in defining project success. Setting time and budget limits and defining the requirements always take place at the beginning of the project, when uncertainty is at its maximum (Pinto, 2007), and it is practically impossible to set realistic limits and goals. In our research we have investigated which project success definitions have been used in the various studies in order to determine the extent to which project risk management has contributed to project success, and to compare and categorise the publications.