This chapter will introduce the foundations of business process modeling using a standard-based approach. In this chapter, we will discuss the concepts of using Business Process Model and Notation 2 (BPMN2), a standard developed by the Object Management Group (OMG). BPMN has become the de facto standard for modeling business processes. With version 2, it has gained the capability not only to model but also to execute processes—thus, it has become an executable language, which allows modeling business processes on different levels of decomposition, from strategy modeling all the way to modeling executable business processes.