Financial performance evaluation of firms is a kind of multi-criteria decision making (MCDM) problem which has multiple and conflicting criteria (financial ratios). Companies should monitor their performance indicators in order to ensure appropriate and timely decisions and plans. The aim of...

One of the most famous ranking methods for digraphs is the ranking by Copeland score. The Copeland score of a node in a digraph is the difference between its outdegree (i.e. its number of outgoing arcs) and its indegree (i.e. its number of ingoing arcs). In the ranking by Copeland score, a node...

Purpose: Evaluation and selection of efficient suppliers is one of the key issues in supply chain management which depends on wide range of qualitative and quantitative criteria. The aim of this research is to develop a mathematical model for evaluating and selecting efficient suppliers when...