“…Finally, in all cases besides (Kung, 2004) no particular approach has been bundled to validate the strength of the model's functionality while the issues of test planning optimization and agent society evolution need further exploration. Proceeding with multi-agent systems approaches (Qi et al, 2006;Zhu, 2004;Gardikiotis et al, 2007a) they do not share many things in common. In all three approaches, agents can be designed for different tasks, deal with different representation formats and deployed on different platforms.…”