Calculating the costs and benefits of fair participation was the topic of the AUMA Fair Efficiency forum on 10 February 2004 in Mainz. It presented strategies by Messe Berlin GmbH, the fair institute in Laubenheim and AUMA. The focus was on raising awareness for expressing and quantifying fair objectives and integrated communication. As a result, AUMA wants to define terms uniformly for the cost-benefit calculation, to enable a better comparison of measuring processes. www.auma.de