1. A method comprising: selecting a first configuration item from a source dataset; failing to identify the first configuration item with configuration items in a target dataset of a configuration management database using identification rules without automatically modifiable acceptance criteria; evaluating a rule against the first configuration item and a second configuration item of the target dataset; marking the first configuration item as identified with the second configuration item upon successful evaluation of the rule if a threshold value for the rule exceeds a predetermined acceptance value; and automatically adjusting the threshold value responsive to the act of marking.