Required Total System Performance (RTSP) Bernard Miaillier EUROCONTROL Agenda Item 3 EUROCONTROL

Genesis of RTSP RCP, RNP, RSP Conceived within the FANS Committee For CNS Performance Requirements Notion generalised to RTSP ICAO ATMCP tasked to investigate feasibility Future ATM to be performance based (incl. safety) (see Agenda Item 1, WP/4 - operational concept ) Complex topic, initial work aimed at ANC/11

Need for Performance Orientation ATM serves society and air traffic stakeholders Various expectations, safety comes first Performance, always a reference: “safe, orderly and expeditious flow of traffic” Performance orientation trend in economy Communicate on goals, achievements Current and future requirements Plans and actual levels Support / facilitate decision making Understand the effect of changes To move system development from add-ons to goal driven

4 A Performance Framework to Structure Discussion Three pillars –A hierarchy of ATM Performance Concepts –Accurate models of ‘what drives what’ e.g. cause/effect relationships between expectations, functions, system components, concept of use, architecture –Rigorous description of traceable performance parameters An approach: ISO13236 Quality of Service Framework

Hierarchical ATM Performance Concepts & Models Level 1:Political and socio-economic requirements safety, security, environmental efficiency, costs, etc. Level 1:Political and socio-economic requirements safety, security, environmental efficiency, costs, etc. Level 2:RASP safety, throughput, delay, predictability, flexibility, etc. Level 2:RASP safety, throughput, delay, predictability, flexibility, etc. Level 3:RTSP on operational functions/entities set of characteristics Level 3:RTSP on operational functions/entities set of characteristics RfnPRf1P Level 4:System Requirements for an airspace and/or type of users sets of consistent enabler requirements, e.g. RNP, RCP, etc. Level 4:System Requirements for an airspace and/or type of users sets of consistent enabler requirements, e.g. RNP, RCP, etc. { … } Level 5:Standards & specifications (technologies) tech. SARPs, MOPS, standards, ISO90xy, etc. Level 5:Standards & specifications (technologies) tech. SARPs, MOPS, standards, ISO90xy, etc. Actual Performance Measurement & Monitoring

Illustration RNP –navigation accuracy RCP –95% transit delay –message integrity –reliability/availability Illustration RNP –navigation accuracy RCP –95% transit delay –message integrity –reliability/availability Quality of Service (QoS) Framework ISO Use for RTSP seems appropriate for ATM system constituents, even operational services –they can be represented in terms of information processing Describing underlying technical services Main requirements covered by 4 characteristics Delay - Transient responsiveness Capacity - Throughput Integrity - Accuracy Reliability - Availability

From Expectations to System Characteristics RTSP RASP ATM System “SMART” Metrics Trade-offs, except for safety Global / regional / local targets Vs global standards Operational concept Scenarios System architecture Operational concept Scenarios System architecture Expectations

RTSP: an aggregate of ATM system component requirements Describes the performance of the ATM Concept Components in a given environment –Adapted to local and user needs –Defined for most demanding characteristics –Not independent from available implementation options balance between generic (to keep implementation flexibility), specific (to prevent proliferation of solutions) –Driven by most stringent requirements likely: conflict management and navigation (real-time, safety related decisions) Summed up by a few Categories only ?

RTSP / Performance in ICAO Activities Framework to facilitate co-ordination of individual contributions Planning Tool Global, regional or local: same model, consistency, harmonisation For the target situation and the implementation steps towards it Monitoring Tool Against objectives, at appropriate level Feed back is essential

Future Work Feasibility to be confirmed Define metrics Further develop the framework Distribute individual aspects to panels with an overall consolidation body Keep momentum on SARPs development and planning Priorities Upper layers, definition of indicators/targets Understand ATM system behaviour

Agenda Item 3: Expected Discussion Outcome WP/8: basis for discussion Conference expected to –Support performance orientation for future ATM definition –Call for, and support, more work to Formulate and define objectives/targets & metrics Harmonise all contributions within an overall framework.