1. A method for modeling invariant relationships among a plurality of flow intensity measurements in a distributed system, comprising: (a) randomly selecting one measurement from the plurality of flow intensity measurements; (b) searching for a relationship between said one measurement and each remaining one of the plurality of flow intensity measurements; (c) grouping said one measurement and each one of the plurality of flow intensity measurements having a relationship with said one measurement into a cluster; and (d) determining a relationship between a first flow intensity measurement in the cluster and a second flow intensity measurement in the cluster, both the first and the second measurements being other than said one measurement.