Article 21 4

(a)

the collection, validation, examination, evaluation and dissemination of relevant data related to the performance of air navigation services and network management from all relevant parties, including air navigation service providers, airspace users, airport operators, national supervisory authorities, national competent authorities, and other national authorities, the Agency, the Network Manager and Eurocontrol;

(b)

key performance indicators for target setting in the key performance areas referred to in paragraph 3, point (a) of this Article, without prejudice to paragraph 3, point (c)(iii) of this Article,and to Article 28, point (g);

(c)

indicators for monitoring performance in the key performance areas referred to in paragraph 3, point (a) and relevant safety indicators defined in coordination with the Agency;

(d)

a methodology to calculate breakdown values;

(e)

procedures for the establishment and revision of performance plans and of performance targets for air navigation services, and for the network management, as well as the templates, content and timetables of such plans;

(f)

the assessment of the draft performance plans and targets for air navigation services and network management;

(g)

monitoring of performance plans, including appropriate alert mechanisms for revision of performance plans and targets and for the revision of Union-wide performance targets in the course of a reference period;

(h)

benchmarking of air navigation service providers designated under Articles 8 and 10 where relevant;

(i)

incentive schemes including both financial positive incentives and disincentives;

(j)

risk-sharing mechanisms in respect of traffic and costs;

(k)

timetables for target setting, assessment of performance plans and targets, monitoring and benchmarking;

(l)

general principles established by the Commission on a proportional allocation of costs common to en route and terminal air navigation services between the two categories of services;

(m)

mechanisms to address unforeseeable and significant events which have a material impact on the implementation of the performance and charging schemes.