Business Process Modelling Notation - a formal notation for describing steps/rules/roles etc in business processes, e.g. order processing. It's both a document

Business Process Modelling Notation - a formal notation for describing steps/rules/roles etc in business processes, e.g. order processing. It's both a documentation notation that can be used by analysts and managers, and (at least in later versions) an executable language that can be used for running those processes.