Process Orchestrations

Abstract

The process orchestrations chapter is the centre of gravity of the book. After introducing control flow patterns independently from specific notations, the most important process modeling notations are introduced, starting with Petri nets. Event-driven process chains are presented as a means to informally characterize simple business processes. Workflow nets are introduced as a specific variant of Petri nets that enable formal analysis of business processes. Yet Another Workflow Language is discussed and its execution semantics is described. Finally, the industry standard Business Process Model and Notation is discussed. All important concepts of the BPMN in Version 2 are described and illustrated by examples.