Determined results of which measured data of a plant is normal/abnormal are mapped to a plant model in an abstract function level hierarchically represented with flow structures of mass/energy and goals to be accomplished by the respective flow structures so as to detect a failure propagation network....http://www.google.es/patents/US5914875?utm_source=gb-gplus-sharePatente US5914875 - Method and apparatus for diagnosing plant anomaly
