This paper traverses the domains of leadership and decision-making within various types of systems with different levels of complexity. The article presents some background about both leadership and decision-making, and then explores the concept of leadership decision-making and some of the factors involved. The paper then reviews complex systems and provides examples to differentiate complex systems from other systems. Finally, these strands are brought together with a consideration of

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... ip decision-making in complex systems and presentation of a framework to assist managers faced with decision-making in complexity, based on data collected in a survey. The aim and practical contribution of this paper is to improve the outcomes of leadership decision-making within complex systems, based upon the findings and on a decision aid model derived from them. The paper, therefore, should help people in real life and leaders within organizational settings to improve their decision-making effectiveness within the ever-increasing range of complex situations which are now widely encountered.