Living Safety Cases for Aviation
An ARP 4761/AC 25.1309-style risk matrix and live fault-sequence bowtie diagrams, from Failure Condition classification through to mitigation.
ARP 4761 and AC 25.1309 Failure Condition Probability, Computed Against Severity Thresholds
Civil aviation safety assessment, as described in SAE ARP4761 and FAA AC 25.1309, classifies each failure condition by severity — Catastrophic, Hazardous, Major, Minor, No Safety Effect — and requires the associated probability to fall below a threshold that gets stricter as severity increases. SAFOPS's aviation project template starts from this style of matrix, computing probability from your model rather than requiring it to be entered by hand, as a reviewable baseline you adjust to your own programme. An automated consistency check keeps the template and its example project aligned, so a new project always starts from the reviewed baseline.
Interactive Bowtie Diagrams: Every Fault Sequence Traced to Its Barriers
Initiating events, preventative and mitigative barriers, and consequences are modelled as interactive bowtie diagrams you can click, drag, and zoom through — hover any barrier to see its zone of influence and open deficiencies directly on the diagram, not in a separate tracker. Deficiencies flow straight into the Deficiencies Schedule, and a barrier credited across several failure conditions is recognised once rather than double-counted.
A Tamper-Evident Audit Trail for Certification Review
Every edit to the safety assessment, whether made by an engineer or suggested by the optional AI copilot, is logged in a SHA-256 hash chain — a tamper-evident record for internal review and certification authority scrutiny alike. Scrub back through that history with Time Machine, or freeze an approved version as a formal issue.
Software, With Safety Engineers Behind It
You don't have to adopt SAFOPS alone. Our safety engineers can do the work in the platform for you — performing the hazard identification and risk assessments, building the fault-sequence models, and keeping the safety assessment current as the design evolves — from a one-off migration of legacy documents to ongoing support through certification milestones. Use SAFOPS as a tool, a fully managed service, or anything in between.