The Technical Assistance and Information Exchange (TAIEX) instrument was initially put in place to assist the public administrations of European Union (EU) candidate and potential candidate countries to “fill the gaps” in their knowledge and understanding of EU rules and procedures (acquis communautaire) with regards to the internal market. TAIEX has since been rolled out to European Neighbourhood Partnership (ENP) countries and now also covers the entire acquis. It shares the expertise of European Union Member State (EUMS) public officials and civil servants with beneficiary countries and as such fosters networks. AETS was nominated by the Directorate General for Neighbourhood and Enlargement Negotiations (DG NEAR) of the European Commission to evaluate the capacity of the TAIEX instrument in the Western Balkans and Turkey. The overall objective of this evaluation was to enhance European Union added value and cost-effectiveness (efficiency) in delivering TAIEX assistance while addressing beneficiary needs. The specific objectives of the evaluation can be summarised as follows: • To assess TAIEX capacity to make adequate expertise of EUMS public officials and administrations available to countries wishing to align their standards with the European Union’s in the most relevant and effective way; • To assess the TAIEX contribution to: - Improving the performance of Candidate Countries and potential Candidates in transposing, implementing and enforcing legislation in the pre-accession context; - Enhancing transparency and information flow, and to building institutional capacity; - Assisting in advancing key institutional reforms, approximation with EU legislation and in deepening trade agreements. The evaluation focused on a sample of four countries and TAIEX initiatives (workshops, expert missions, study tours). Questions were be formulated against measurable indicators and grouped under the five OECD-DAC criteria (relevance, effectiveness, efficiency, sustainability and impact).