In this chapter, we propose OrdinoR, a novel framework for organizational model mining. We introduce a new, formalized notion of organizational model as the foundation of the framework. Compared with the state-of-the-art, our notion of organizational model is richer, as it specifies not only resources and their groups but also the connection between resource groups and the multiple dimensions of process execution, captured by the so-called execution contexts. We will elaborate on these concepts in Sections 2.2 and 2.3. Figure 2.1 illustrates the OrdinoR framework for organizational model mining. Built upon the new notion of organizational model, the framework is designed to support three types of organizational model mining tasks as follows.