THE FINAL SOLUTION OF THE EUROPEAN JEWISH QUESTION
Statistical Report
In January of 1943, Dr. Richard Korherr, a noted statistician who was outside SS circles, working with Adolf Eichmann and camp commanders, began compiling reports and figures to present to Heinrich Himmler. In 1943 and 1944 he updated the report every three months.In his trial in Jerusalem, Eichmann stated that the Korherr Report had served him in the planning stages of the extermination. Information on the number of Jews enabled the Nazis to determine the size of the team they would need to organize the liquidation of the Jews in a specific place or specific country, the number of railway cars that would be required, and the final destination of the victims, the extermination camp.
http://www.adolfhitler.ws/lib/genocide/Korherr.html
http://motlc.wiesenthal.com/text/x13/xr1328.html