Software system safety

“The dependability of a system is the property that allows its users to place justified trust in the service it delivers.”
— Jean-Claude Laprie

Ensuring dependability helps avoid the additional costs incurred by non-compliance with safety requirements.

Systerel performs dependability and safety analyses for highly critical systems. These activities contribute to establishing the safety level according to the normative requirements of highly constrained systems.

Domain knowledge

Railway systems

  • Metro, trams, high-speed lines
  • Signaling, interlocking stations, next-generation stations, computerized switching stations, etc
  • CBTC (ZC, CC)/SAET/OCTYS, ERTMS (EVC, RBC), KVB, DMI…

Aerospace Systems

  • Inertial navigation system (IRS), thrust reversal (ETRAS), landing gear systems(LGS, LGBSCU)…
  • DO178 C certification kit for tools used in aircraft electrical distribution systems

Strong Expertise in Methodologies

  • Process hazard analysis
  • Functional analysis
  • Failure mode, effects and criticality analysis (FMECA)
  • Software error impact analysis (AEEL)
  • Fault tree analysis
  • Dependency analysis
  • Independence analysis
  • Reliability and availability calculations

Mastery of normative processes

  • Expertise in safety-critical systems
  • Compliant with industry standards norms: CENELEC EN 50126, EN 50128/EN 50716, EN 50129, IEC 61508, IEC 62138, ARP 4761, etc.

Examples of activities:

  • Writing the safety assurance plan
  • System/software risk analysis
  • Specification of safety requirements
  • Establishment of a safety report (generic product, generic application or specific application)

Safety-critical systems have very high dependability requirements.

Qualified Accredited Functional Safety Body (OQA SDF)

As a Qualified Accredited Functional Safety Body (OQA SDF), Systerel evaluates the safety of railway systems, particularly in the fields of railway control-command and signaling.

Evaluation Directors

Our Evaluation Directors (DRE) are recognized experts in functional safety and cybersecurity, with highly complementary backgrounds, enabling them to address issues that are both vast and complex.

  • Autonomous Road Transport Systems (STRA): Cybersecurity compliance evaluation for autonomous vehicles
  • Railway Systems (STRTMG): Signaling, traction logic, etc.