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Case interrelations Relationships and integration Episode 3 - CAATS II Final Dissemination Event John Harrison Hu-Tech CAATS II Brussels, 13 & 14 Oct 2009
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Episode 3 - CAATS II Final Dissemination Event 2 The need for cases Complexity of ATM system Many concerns Many interactions Scope for unforeseen consequences of change Specialist expertise Generalists cannot go into enough depth Balanced judgements Need formal structure to ensure all aspects covered Process to filter and reconcile key issues for decision
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 3 Cases: different perspectives Case E Case D Case A Case B Case C Case F Concept (benefits, costs, Issues)
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 4 Development & evaluation Evaluation informs decisions Concept (ATM system + proposed change) Case ACase BCase CCase DViewpoint AViewpoint BViewpoint C Viewpoint D Decisions
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 5 Different perspectives imply … Different simplifications (to focus on key issues) System models must be coherent Different language (from specialist concerns) Present results for non-specialists Different priorities Link concerns and conclusions explicitly to KPAs and (KPIs) Potentially different stakeholders Manage the balance between shared and separate access
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 6 Outputs, processes, teams Relationships needed for cost-effective, coherent cases
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 7 Specific relationships Business Case Provides a focal point for performance assessments Coordinates with other cases Provide justification (economic impact) to support decisions Safety case Contributes to Business case - Concept cost depends on safety mitigation - Safety gains or losses affect overall business case Needs HF input where human performance affects safety Human Factors case Focuses on key (human) system component - Inherent overlap with other cases - Human performance affects most aspects of system. - many shared concerns with other disciplines Environment case Co-ordinates with Safety case on scope definitions - Common coverage of items as third party risk Contributes to Business case
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 8 Indirect case interaction Cases evolve during a project Issues are uncovered Ideas about resolution are formed Emergent cases influence concept development Resolve the problem by change, rather than just report it at the end So the concept is a moving target Cases indirectly affect each other Need to maintain coherence Easier if case teams are mutually aware But case teams must retain independent view
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 9 Case integration KPAs (Key Performance Areas) Cover ‘all that matters in ATM’ Can be weighted and prioritised Cases Cover different specialist perspectives Not uniform mapping to KPIs Might not be complete Drivers and constrainers Different concepts – different emphasis Some KPAs drive the concept Some KPAs guide and constrain Drive-constrain balance different in different cases
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 10 Combining evidence Effectiveness hierarchy Cost hierarchy Comparison Overall assessment Stakeholder input Evidence from Cases
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 11 Achieving effective integration Identify maturity across all Cases to be integrated In advance in a uniform way Establish effective communication among all stakeholders Regardless of primary interest (in particular Case) Involve stakeholders in all critical decisions … Definition of assumptions and KPIs Relative importance of Cases KPAs and KPIs Coordinate inputs used by different Cases … Use of common inputs One Case output feeding other Case input Select integration/aggregation method for Case results Considering lifecycle phase Communicate Case results and integrated outcome to stakeholders of all Cases
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Brussels, 13 & 14 Oct 2009 Episode 3 - CAATS II Final Dissemination Event 12 Questions…?
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