1. A method of ranking a report, said method comprising: receiving a report including a current distribution of first numerical data, said current distribution being distributed across a plurality of bins; receiving a baseline distribution of second numerical data, said baseline distribution being historical data relative to said current distribution and also being distributed across said plurality of bins; calculating a shape change value between said current distribution and said baseline distribution using a computer; calculating a volume change value between said current distribution and said baseline distribution using said computer; calculating a measure value by combining at least said shape change value and said volume change value using said computer; and outputting a rank of said report based upon said calculated measure value.