Before we move further, it's important to understand some of the rules that are helpful while modeling and designing our business processes. In this section, we will look into a few main modeling rules from the perspective of modeling a process and the instructions specified by BPMN.
A good process model should allow the overall process flow to be visible at one glance either from left to right or from top to bottom. To achieve that, a modeler can follow these basic rules:
Aim for a minimum of four and a maximum of 15 tasks in a process diagram
Aim for a maximum of three or four levels in a hierarchy
A good model gives you an intuitive and easy-to-understand overview of how a business process works as this is the main purpose of a graphic model. A model with a large number of tasks may be correct and unambiguous but becomes difficult to understand and, therefore, less useful. You...