In the example shown below, one difference has been identified. The expected value of Cargo[2] packaging value is standard, but the Ruletest produced an actual value of oversize. Since the Output does not match the Expected data, the text is colored red.

In this example, notice that it is the value determined by the rule that changed, not the input values. Research indicates that the designer changed the rule for volume from >30 to >=30 thereby triggering the different container requirement.