Abstract
Intelligent software based on agent technology emerges to improve system design, and to increase enterprise competitive position as well. The competitiveness is based on the cooperation. Thus, within this cooperation, conflicts may arise. Argumentation theory has become an important topic in the field of Multi-Agent Systems and especially in the negotiation problem. Moreover, research on trust and reputation is a recent discipline oriented to increase the reliability and performance of electronic communities. In this paper, first, an overview of a proposed model MAIS-E-2 (Multi Agent Information System for an Extended Enterprise) and a proposed argumentation based negotiation framework: Relationship-Role and Interest Based Negotiation (R-2-IBN) framework is presented. Then, we focused mainly on the description of the proposed trust and reputation model. For that, we conduct an hybridization of approaches: fuzzy, mathematical and statistical.