This paper presents a real case study dealing with the comparison of transport scenarios.The study is conducted within a larger project concerning the establishment of the maritime traffic POCKET SQUARES policy in Greece.The paper presents the problem situation and an appropriate problem formulation.Moreover a detailed version of the evaluation model is presented in the paper.The model consists of a complex hierarchy of evaluation models enabling us to take into account Pet Supplies the multiple dimensions and points of view of the actors involved in the evaluations.