Expert Choice model for choosing appropriate trenchless method for pipe lying

Trenchless technologies of pipe laying have relatively short application in Croatia. With today's improved technologies, it is not easy to choose the right and optimal method. Each method is characterized by technical parameters such as: nominal diameters of installed pipes, the material of installed pipes, driving distances, soil types which have a possibility of installing a pipeline using a given method, the depth of cover, etc. Therefore, we made a model in ExpertChoice, to help choosing trenchless method. We consider that trenchless methods have, or at least can have application in Croatia. In this paper we give a classification of trenchless methods applied in the model, assumptions, limiting conditions, input and output quantities.