In Kanji's Business Excellence Model leadership plays the prime role for th
e creation of excellence in an organization. In this paper, we investigate
why leadership is the prime and how leadership excellence converges from th
e core values of the organization. In order to do so, we start by discussin
g the concept of leadership and reviewing the main theories developed in it
s study. Then, we identify the fundamental competencies of leaders in a qua
lity organization. Supported by an extensive literature review, we propose
a structural equation model for leadership. To illustrate its application,
we present a simplified example. Given the criticality of leadership, the e
mergence of a model that expands the understanding of the leadership constr
uct and its measurement is of major importance for organizations to pursue
business excellence. The purpose of this paper is to make a significant con
tribution in this regard and open the debate to further discussions and ref
inements.