Abstract: This dissertation reports on a scholarly journey to better understand the processes of clinical decision-making by nurses. It begins by identifying the various terms used to describe a clinical decision, its components and the contexts within which clinical decisions are made. Two philosophies of decision-making are summarised. Some insight into the history of the phenomenological and the rationalist theories of decision-making is offered. The author notes that it became evident that both of these theories are applicable to all nurses and their clinical decision making competencies. Four studies that were undertaken to analyse the decision-making methods of nurse practitioners are critiqued. Of the studies two are British, one is American and one is Australian. The author has summarised the combined findings that identified that the nurses were using a blend of decision-making processes that involved rational decision making as well as the use of intuition. The studies identified that sound clinical decision-making is determined by appropriate educational and clinical preparation and supported by a formal mentoring process and the use of critical reflective practice. In conclusion, the author reflects on her knowledge of decision making prior to embarking on the dissertation and states her intent to facilitate and support advanced decision-making by her colleagues. She goes on to say that uppermost is the need for an institutional and managerial environment that encourages advanced and independent decision-making by nurses.