Status date

IDeAS will, in the frame of the Iris programme, facilitate the understanding of aviation safety and certification requirements in standard space domain terminology, and provide an initial road-map to future Iris service certification.

This activity will:

  1. Critically assess the present aviation service requirements against ECSS design requirements, and develop a mapping between them.
  2. Develop a methodology for the translation of aviation service requirements to Iris system design requirements.
  3. Produce a draft safety and verification methodology in line with Air Traffic Management best practice.
  4. Support to ESA during the evaluation and convergence process.

Space programmes use dependability and end of life availability figures to define requirements, whereas aviation typically specifies system performance metrics, such per probability of failure per flight hour.

Space programmes typically study only equipment elements, when considering system safety and validation aspects. However aviation certification and safety requirements focus on a wider system view which encompasses equipment, people and procedures, as well as service safety.

IDeAS will provide a guide for space domain specialists to understand the language and methods of the aviation domain, and additionally enable translation of system and safety requirements between the two domains.


The Iris programme will have a clear understanding of the aviation safety and validation requirements, in terms and concepts which are familiar to space programmes e.g. existing ECSS standards.

Additional benefits are expected to be derived from early inclusion of safety, certification and operational service delivery considerations within the programme framework. Such considerations may influence design and development decisions, and a clear understanding of certification requirements may mitigate or prevent programmatic impacts.


IDeAS will deliver a series of technical notes:

  1. Aviation safety standards state of the art and space RAMS design requirements,
  2. Aviation glossary of term and references,
  3. Methodology for the definition of RAMS requirements for safety critical services,
  4. Iris safety implementation and verification methodology,
  5. Iris certification roadmap,
  6. Iris certification plan.

The Project started in late June 2008 with the following schedule:

Negotiation/Kick-off Meeting  
Requirement Assessment Review (RAR) October 2008
Safety Assessment Review (SAR) December 2008
Final Review (FR)

January 2009


Current status

The study completed with the final submission of the 6 TNs, Final Report and Executive Summary, with the following major conclusions:

  • The current aviation standards and requirements are, or may be, satisfied by appropriate tailoring of the project space domain standards and requirements. Areas in which there is no applicable or potentially insufficiently rigorous space standard aviation requirements shall be identified.
  • The performance requirements given in the COCR and the NAT SPG are very much communication and ATC derived perceptions that do not follow the same logical reasoning as used in the Navigation domain; therefore care should be taken when using requirements having the same nomenclature as they may have different meanings.
  • One main considered issue is that the regulatory process for Aviation (ATC) systems is going through a transition. EASA is about to be given the competency to regulate/certify the pan European provision of air navigation services within the European Union.
  • The main recommendations are that the Phase B programme should be used to prepare a safety plan (as a living document) that would be used to approve the development in Phase C/D of the programme. This plan should also identify the Safety Management System (SMS) being put in place.
  • A safety board should be developed with EASA having a leading role with the role of reviewing the safety deliverables.