Fault Tree Analysis (FTA)

Fault Tree Analysis (FTA) is a top-down, logic-driven risk assessment method that identifies how multiple small failures can cascade into a critical system event. It's the tool you need when failure is not an option—and when you want to understand the "why" behind the "what if."

FTA is ideal for complex systems like drones, robotics, avionics, and automated machinery, where multiple components interact and redundancy, human error, or hidden dependencies can create critical points of failure.

Why Fault Tree Analysis Matters

1. See the Big Picture of Failure
   FTA helps you visualize how combinations of faults, errors, or external events can lead to a top-level hazard—offering clarity beyond single-point assessments.
2. Certify with Confidence
   Aerospace, automotive, defense, and medical sectors all rely on FTA for certification. It’s aligned with standards like ARP4761, ISO 26262, MIL-STD-882, and DO-254/178C.
3. Discover Hidden Dependencies
   Uncover indirect risk chains or failure contributors that aren’t obvious from part-by-part analysis—ideal for safety-critical systems.
4. Make Informed Design Trade-Offs
   FTA provides logic-backed insights into which components, interactions, or redundancies actually mitigate risk—and which just add complexity.

What This FTA Service/Product Delivers

Top-Event Definition

We start with your most critical risk scenario (e.g., "loss of control," "uncommanded descent," "fire on board") and build the tree down from there.

Logical Gate Modeling

We map how hardware, software, environmental factors, and human actions could logically combine to trigger the top event—using AND/OR logic, inhibition, and other gate structures.

Quantitative or Qualitative Analysis

Depending on data availability, we perform probabilistic analysis (MTBF, failure rates) or deliver a qualitative review with severity rankings and confidence indicators.

Structured Output

You get a clean, regulator-ready report or model:

• Graphical fault tree diagrams
• Event definitions and IDs
• Failure rates (if applicable)
• Mitigation recommendations

All documentation is ready to plug into safety cases, design reviews, or certification filings.