Have a look at e.g. this presentation: https://web.archive.org/web/20060622072014if_/http://www.tcrug.org:80/Documents/PPM02%20final.ppt https://web.archive.org

Have a look at e.g. this presentation: https://web.archive.org/web/20060622072014if_/http://www.tcrug.org:80/Documents/PPM02%20final.ppt https://web.archive.org/web/20060622072014if_/http://www.tcr... The state transition graphs of Objectory (Jacobson's method) on the other hand originated in SDL process and procedure diagrams, which were issued in 1976 by CCITT as the Z101 to Z104 recommendations.