1. A method of signal processing with reduced combinatorial complexity for evolving phenomena associated with obtainable parameters, the method including the steps of: a) selecting from the phenomena a current phenomenon which is previously unprocessed by the method of the invention; and b) obtaining a parameter set associated with the current phenomenon; c) designating a start node as a parent node; d) if there is a previously processed phenomenon with at least one existing node not yet treated as the parent node, treating the one such existing node as the parent node instead of the start node; e) selecting a parameter from the parameter set; f) producing a child node identity associated with the selected parameter; g) representing child nodes of like identity for the selected phenomenon as a single node with multiple parameter relationships corresponding to parameters associated with at least one parent node; h) representing child nodes with differing identities as separate nodes; i) iterating e) to h) for other parameters in the set if available; j) if there remain one or more existing nodes not yet treated as the parent node iterating d) to i) until none such remain; k) iterating a) to j) for other phenomena in the set; and l) deriving updated sets of parameter weights associated with respective phenomena by iterating over node relationships and identities.