This paper applies a modelling processes borrowed from the area of process-engineering. By process-engineering we do not refer to mere flow diagrams of the administrative processes, but to a deeper systematic modelling of the learning process itself, the cognitive development, the intersection of the loci of effort of the main protagonists (Student and Supervisor), and the research methodologies used to further the venture.While there are many perspectives on postgraduate research, the systematic modelling perspective is poorly represented in this area, and models of postgraduate studies are scarce. This paper develops a system model of the learning process itself, the cognitive development, the intersection of the loci of effort of the main protagonists (Student and Supervisor), and the research methodologies used to further the venture. It represents the causal factors that are surmised to affect student success. It also provides a theoretical framework within which to interpret the body of knowledge. One of the central concepts that emerges from this model, is that of the strand of purpose. This flows through the whole research venture: setting up the research proposal, guiding the research, providing personal motivation, and finally becoming the golden thread that runs through the thesis, terminating in the conclusions.