In mission-critical fields, safety and reliability have to be built in from the start — they are how the program succeeds, not a paperwork exercise after design freezes.
We structure the safety assessment process so hazards, architecture decisions and item assurance levels stay connected through development, and we back that with reliability prediction and demonstration methods that primes and authorities recognize.
Hazard assessment, architecture-driven DAL allocation and reliability evidence that stand up in review.
Safety assessment process
Aircraft Functional Hazard Assessment (AFHA)
Preliminary Aircraft Safety Assessment (PASA)
System Functional Hazard Assessment (SFHA)
Preliminary System Safety Assessment (PSSA)
System Safety Assessment (SSA) and Aircraft Safety Assessment (ASA)
Safety plans matched to FAR/CS 2X.1309, ARP4761A/ED-135 or MIL-STD-882
Safety assessment methods
Fault Tree Analysis (FTA)
Dependence diagrams and Markov analysis
FMEA / FMES (functional and piece-part where required)
Common Mode Analysis (CMA) and Cascading Effects Analysis
Zonal Safety Analysis (ZSA) and Particular Risks Analysis (PRA)
Reliability engineering
MTBF / failure-rate prediction and demonstration planning
Reliability Block Diagrams (RBD) and availability modelling
Data sources such as MIL-HDBK-217, FIDES, NPRD/EPRD and Telcordia where applicable
Feedback of reliability and DAL results into systems engineering
