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Purpose of the Assessment

Purpose of the Assessment. Safety Impact Assessment Purpose. Demonstrate that the Digital SNOWTAM infrastructure is providing a satisfactory service to the users involved The test facility fulfils its intended function It is acceptably safe. Overall Safety Argument in GSN*.

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Purpose of the Assessment

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  1. Purpose of the Assessment

  2. Safety Impact Assessment Purpose • Demonstrate that the Digital SNOWTAM infrastructure is providing a satisfactory service to the users involved • The test facility fulfils its intended function • It is acceptably safe SNOWTAM Trial Safety Impact Assessment

  3. Overall Safety Argument in GSN* ‘Success’ approach Normal operations ‘Failure’ approach Failure modes GSN: Goal Structuring Notation SNOWTAM Trial Safety Impact Assessment

  4. Intended Functions Operations Specification Implementation Design Safety ‘coverage’ of the V-cycle Arg2: Failure Mode(failure approach) Arg1: Nominal Mod (success approach) SNOWTAM Trial Safety Impact Assessment

  5. ‘Success’ approach

  6. Users and Intended Functions SNOWTAM Trial Safety Impact Assessment

  7. System Fulfils its Intended Functions Test infrastructure fulfils intended functions How to help the Safety Expert checking this? Traceability Specification Design Implementation Operation SNOWTAM Trial Safety Impact Assessment

  8. Specifications (*) Table partially reproduced SNOWTAM Trial Safety Impact Assessment

  9. Design SNOWTAM Trial Safety Impact Assessment

  10. ‘Failure’ approach

  11. System is Acceptably Safe Check safety requirements are covered Hazard analysis ▼ Safety requirements SNOWTAM Trial Safety Impact Assessment

  12. Simplified process Hazard analysis Mitigation means Safety requirements Specification, Design Test infrastructure, Operations SNOWTAM Trial Safety Impact Assessment

  13. Identified Hazards SNOWTAM Trial Safety Impact Assessment

  14. Mitigation means => Safety Requirements (*) Table partially reproduced SNOWTAM Trial Safety Impact Assessment

  15. Checking coverage of safety requirements (*) Table partially reproduced SNOWTAM Trial Safety Impact Assessment

  16. Assessment caveats

  17. Caveats - Assumptions - Outstanding Issues Digital SNOWTAM performances depend on the availability and the quality of some external data as the SNOWTAM information itself and some static aeronautical information (e.g. airport layout) - Limitations The real effectiveness for most of the Safety Requirements mainly depends on each user and their awareness on the use they can do of Digital SNOWTAM infrastructure SNOWTAM Trial Safety Impact Assessment

  18. Conclusion

  19. Assessment Conclusions - The proposed Digital SNOWTAM infrastructure fulfils the intended functions for the Digital SNOWTAM trial. - There is no impact on real ATM related operations while using Digital SNOWTAM infrastructure during the trial. SNOWTAM Trial Safety Impact Assessment

  20. Developer’s ‘mantras’ - Integrate safety aspects in your development as soon as possible - Traceability SNOWTAM Trial Safety Impact Assessment

  21. Questions?

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