translate English to German: It is based on the comparison of pairs of alternative solutions during which all alternatives are compared to one another and you, as a decision maker, express intensity and the level of preference towards one alternative in relation to the other according to the criteria you find important. In the same way, you compare criteria according to your own preferences and their intensity.
Die Methode nennt sich Analytischer Hierarchieprozess (AHP - Analytic Hierarchy Process).