The aim of this paper is to explore the decision-making processes of causation and effectuation within New Zealand entrepreneurs. One-on-one, semi structured interviews were conducted to investigate; the extent of Causation and Effectuation followed by entrepreneurial start-ups in years four to eight of operation? In Addition, whether decision-making process and perceptions of market uncertainty differ across industries? Findings indicate that effectuation was predominantly followed. This research extrapolates new, key themes regarding decision-making. The decision-making process was largely seen as entirely subjective and dependent on the personality of the entrepreneur, their opportunity recognition experience and ideals of running the business.