Bruce Silver has written a great article on BPMN (Business Process Modeling Notation).  I have been using BPMN to model business processes for about 2 years and has proven to be a much better tool than a basic process flow diagram or a UML activity diagram.  BPMN defines a variety of symbols which are ubiquitous - this ensures that the meaning intended by the modeler is clearly communicated to the reader.  Read the article for more....

http://www.bpminstitute.org/articles/article/article/bpms-watch-what-if-bpmn-were-a-modeling-language.html

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