Multinational pilot projects

Multinational pilot projects provide controlled environments in which public organisations can jointly test, validate, and refine interoperability solutions before committing to large‑scale or long‑term implementation. They are particularly valuable for innovative, cross‑border use cases where technical, legal, organisational or semantic uncertainties need to be explored incrementally and collaboratively.

In the context of the Guidelines, multinational pilot projects focus on the experimentation and evaluation of interoperability solutions, such as shared data models, interfaces, APIs, semantic artefacts, reference architectures or reusable components. By working together in a pilot setting, participating public organisations can build a shared understanding of interoperability challenges, harmonise approaches where feasible, and develop trust across administrative and national boundaries.

This scenario is closely linked to the concept of interoperability regulatory sandboxes, as set out in Articles 10, 11 and 12 of the Interoperable Europe Act. Regulatory sandboxes provide a formal mechanism that allows participants to develop, test and validate interoperability solutions under supervised conditions, which may include temporary flexibility in the application of certain regulatory requirements, where permitted by law and subject to safeguards.

At the same time, multinational pilot projects may also be conducted outside a sandbox setting, under normal regulatory conditions. In both cases, similar principles apply: experimentation, collaboration, controlled testing, documentation of results and shared learning across administrations.

This scenario illustrates how pilot projects can complement the publication (Pathway 2), sharing (Pathway 3), adaptation (Pathway 4) and platform integration (Pathway 6) mechanisms of the European Interoperability framework.

Multinational pilot projects are most effective when they are clearly scoped, time‑bound and focused on concrete interoperability solutions, rather than on abstract policy objectives.

Pilot projects typically begin with the identification of a shared challenge or use case that would benefit from cross‑border experimentation, such as mobility services, health data exchange or digital identity integration. Participating administrations may agree on broad objectives, expected outcomes and the specific interoperability solutions to be tested.

Clearly defining the purpose of the pilot, the aspects to be explored and the expected learning outcomes helps ensure focused collaboration and meaningful results.

Pilots often operate in iterative cycles, allowing teams to test components, evaluate results and adjust their approach based on findings. In cross‑border or cross‑sector pilots, particular attention is often required for:

• semantic alignment and shared data models;
• technical interfaces and APIs;
• authentication and authorisation mechanisms;
• compatibility with existing national systems and standards.

These iterations allow interoperability solutions to be refined before wider adoption.

Legal and regulatory aspects should be considered from the outset. Where a pilot is conducted within an interoperability regulatory sandbox, temporary adaptations or flexibilities may be applied under supervision and subject to safeguards, enabling innovative approaches to be explored while managing legal and operational risks, including those related to data protection and cybersecurity.

Where pilots take place outside a sandbox, they remain subject to the applicable legal framework. In both cases, documenting legal assumptions and constraints contributes to transparency and future scalability.

Multinational pilots often reveal differences in legal frameworks, data models, organisational workflows or language requirements. These differences are not necessarily obstacles; rather, they provide valuable insights into how interoperability solutions can be adapted, mapped or harmonised across national contexts.

The experience gained through multinational pilot projects can help determine whether an interoperability solution is suitable for broader implementation, or whether further adaptation or refinement is required. Clear documentation of findings, decisions and technical artefacts supports transparency and facilitates subsequent phases of reuse.

Where appropriate, administrations are encouraged to publish the outcomes of successful pilot projects on the Interoperable Europe Portal or connected repositories, making validated interoperability solutions visible to other administrations and encouraging replication or further collaboration.