This deliverable defines an Assessment Interoperability Framework (Assessment-IF) to ensure consistent and transparent FAIR assessments of Digital Objects (DOs) across diverse typologies and research disciplines. By collecting requirements from scientific communities and aligning with existing resources such as FAIRsharing, it establishes a generic and extendable approach to harmonise tool behavior. Complementary services, including the FAIRassist registry and FDP Index, support the sharing, discoverability, and integration of assessment components. The deliverable outlines current implementation by early-adopter partners and identifies next steps for refinement in future project phases.