The objective of the workshop was to discuss modelling as fit for purpose, by organizing a dialogue and obtaining feedback from modellers, experimentalists and stakeholders on this subject. Questions addressed at the workshop were: What is the purpose of the models? Why do we need radioecology models? How should an ideal radiological model look like? How is the interactions between the modellers and the experimentalist? What is the model/data requirements? The discussions held during the workshop are compliled in COMET deliverable D-N 5.5.