This thesis aims to provide a qualitative analysis of the influence of various factors in a collective, group-based decision-making process, where the group must establish its priorities regarding a multi-objective problem. To this end, an Agent-Based Model is developed to simulate the discussion process, grounded in the Complex Adaptive Systems (CASs) approach. In the first chapter, the theoretical approach of CASs is presented, with Agent-Based Modeling (ABM) as the implementation method. Its relevance in describing human-oriented organizational systems is highlighted through a literature review, with a focus on collective decision-making process. In the second chapter, the multi-objective problem at the center of the discussion is outlined.