Case study · European institution
Optimising the search experience of a multilingual institution
European Parliament · November 2023 to October 2025
The European Parliament makes a considerable volume of documents available to the public and professionals, in every language of the Union. The mission: improve internal search, that is, every visitor’s ability to find the right document, fast.
The problem
- Queries that too often led to zero results, or to poorly relevant results.
- Rich search logs and behavioural data, but under-used to steer improvements.
- A search experience (filters, query refinement, result presentation) to evolve without disruption for users.
The deployed solution
- Steering, over several quarters, of a data-driven and iterative optimisation strategy: result relevance, response speed, reduction of zero results.
- Cross-functional collaboration with UX and UI teams: query refinement, filters, result layout.
- Transformation of search logs and behavioural data (Piano Analytics) into dashboards and strategic recommendations.
The results
- A continuous search-improvement process, data-driven, quarter after quarter over two years.
- UX decisions grounded in real search behaviour rather than intuition.
- Dashboards that made search performance readable for non-technical teams.
The institution’s internal metrics are not publishable.
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