The decision-making context can be characterized by different types of uncertainty that may affect the decision-making process and its outcomes. Such uncertain contexts may lead decision-makers to take unsuited or at least non-optimal decisions. The range-based Multi Actor Multi Criteria Analysis (MAMCA) framework aims to deal with this issue by implementing an exploratory scenario approach into the traditional MAMCA, using a Monte-Carlo simulation. The chapter presents the range-based MAMCA methodology and the main rationales to deploy it.