Organizations have operation and managing processes that become increasingly diverse and complex. These processes may share several characteristics, for example: are made by people; are constrained by limited resources; are planned, executed and controlled. In most organizations, the "planning, implementation and control" characteristic is not effectively put into practice: people diversify functions but processes remain complex and are often conducted without a logical structure. The key to ensure that competitiveness is to describe, standardize and adapt the way to respond to certain types of business events and their interaction with suppliers, business partners, competitors and customers organizations. In this context, emerges the modeling associated with Organizational Engineering with the aim of building organizational representations of facts to create and develop a collective consciousness of organizational reality (self-awareness) in organizations. The approach of this book focuses on the use of the DEMO methodology created and developed by Jan L. G. Dietz, in order to assist such modeling through a semantic wiki.