Performance assessment
Article 12
1. When implementing Article 11, Member States shall ensure that the central unit for ATFM produces annual reports indicating the quality of the ATFM that shall include details of: (a) causes of ATFM measures; (b) impact of ATFM measures; (c) adherence to ATFM measures; (d) contributions by parties referred to in Article 1(3) to the optimisation of the overall network effect. 2. Member States shall ensure that an archive of ATFM data listed in Article 6(5), flight plans, operational logs and relevant contextual data is created and maintained by the central unit for ATFM. The data referred to in the first subparagraph shall be retained for 2 years from their submission and made available to the Commission, Member States, ATS units and operators. That data shall be made available to airport coordinators and airport operators to assist their regular assessment of the declared capacity.