The Business Process Modeling Notation-BPMN–provides a common language which allows all the parties involved to communicate processes clearly, completely and efficiently. In this way, BPMN defines the notation and semantics of a Business Process Diagram (BPD).
BPD is a diagram based on the ‘Flowchart’ technique, designed to present a graphical sequence of all the activities that take place during a process. It also includes all relative information for making an analysis.
BPD is a diagram designed for the use of process analysts who design, control and manage processes. In a BPD diagram there are a series of graphical elements that are grouped into categories.