Workflow for Taverna based on the IMPEx-FP7 method getMostRelevantRun. This method is intended to help users to find those simulation runs in SMDB's tree.xml file whose input parameters best match the given solar wind conditions. For each simulation run in the tree.xml file the method computes a 'difference index'. This 'difference index' is a sum of individual difference indices (one for each solar wind parameter defined in the input parameter set).