pymcdm—The universal library for solving multi-criteria decision-making problems

Multi-criteria decision-making/analysis is a vast field designed for solving decision-making problems. Due to the widespread use of many relevant MCDA/MCDM approaches and their frequent appearance in scientific papers, there is a particular gap regarding comprehensive software that should have relevant components. Therefore, this paper proposes a flexible library written in Python 3 for multi-criteria analysis/decision-making. It includes tools related to evaluating alternative options, determination of Pareto optimal solutions, determination of criteria relevance, comparative analysis, and visualization. The novelty that distinguishes the library from other software is the provision of a wide range of approaches, high performance, consistency of the software, and its small size. The research presented in this paper presents its high potential as a tool that decision-makers and domain experts can use in the decision-making process.