In order to find the initial values to set for the match and duplicate thresholds, you must determine the total range of matching weights that can be assigned to a record. This weight is the sum of all weights assigned to each match field. Running the Bulk Matcher in match analysis mode can help you determine the match and duplicate thresholds. For more information about this tool, see Performing a Match Analysis in Loading the Initial Data Set for a Sun Master Index.
The way you determine weight ranges varies depending on whether you are using m and u-probabilities or agreement and disagreement weights.