PRIMA is an acronym for Pluralistic fRamework for Integrated uncertainty Management and risk Analysis. PRIMA is not a tool in the classic sense, but a meta approach (organising framework) to structure the process of uncertainty management (van Asselt, 2000). The guiding principle is that uncertainty legitimates different perspectives on policy issues and that, as a consequence, uncertainty management should explicitly take these different perspectives into account. In doing so, different legitimate interpretations of uncertain values and causal relationships are explored in a systematic manner, which enables to tell a story behind the various outcomes/outlooks.