摘要:AbstractThe paper presents an original procedure of evaluation of a transportation system, resulting in its assignment into a predefined class, representing the overall standard of the considered system and the level of transportation service. The method relies on the application of the dominance-based rough set theory (DRST), allows for thorough data exploration, evaluation of informational content of the considered characteristics and generation of certain decision rules that support the evaluation process. In the analysis different characteristics (criteria and attributes) describing various aspects of a transporta- tion system operations are taken into account. The assignment of a transportation system to a specific quality class is perfor- med based on the values of characteristics which are compared with the evaluation pattern, i.e. the set of decision rules generated through the analysis of customers’ opinions on transportation system. The method is composed of three steps, including: 1) identification of the most important characteristics, 2) generation of the evaluation pattern, 3) assignment of the transportation system to the appropriate class.