This document describes the Pilot Methodology that will be applied to perform user-testing and assess discipline-specific fi tness of the outputs developed within the EOSC EDEN project. The testing will be performed by teams representing the seven early-adopter disciplines of the EOSC EDEN project, following the guidelines outlined here. This document covers the full testing process from preparing testing materials and generating evidence, through to evaluation. Testing teams will assess outputs based on multiple feedback dimensions and user-acceptance criteria. The criteria and the methodology will be defined and refined iteratively in collaboration with the testing and development teams.