In its current form, the Complementary Management Model is the result of a theoretical conceptualization process that has developed over many years. It started out as a broad outline and was subsequently further developed, with publications to date reflecting the respective stage of development (see Kaehler 2012, 2013, 2014a, b, 2017, 2020). Like most forms of systematic theorizing, it is based on practical observations, literature studies, and conceptual ideas that are condensed into a consistent web of theoretical assumptions. The individual mechanisms have been tested in practice and reflect functional people management and leadership as it is practiced in many organizations. The overall model has been applied in various companies and substantially refined on the basis of the experience gained. Next, empirical studies should be carried out which accompany its implementation in organizations and examine its effectiveness.