An expert system method is disclosed for analyzing window protocol-based data flows in a data communications network. The method includes the use of a data flow efficiency state variable S which is a binary number having at least three bits which reflect the number of packets transmitted by a node, the...http://www.google.com/patents/US5197127?utm_source=gb-gplus-sharePatent US5197127 - Expert system method for performing window protocol-based data flow analysis within a data communication network