This paper is part of a the presentation that Hermann Schafer, Director General of the Haus der Geschichte der Bundesrepublik Deutschland, and Hands-Joachim Klein, of University of Karlsruhe, gave at the Visitor Studies Conference in St. Louis. The researchers present the idea of making comparisons and appraisals of other exhibitions which have similarities to the exhibit which is being planned, as a systemic approach of evaluation which is supplemental to current procedures, known as "ACE"--Analogous Comparative Evaluation.