System Safety Engineering

ModAsfa provides expert support across the full system safety lifecycle — from concept hazard assessments to safety case development and safety verification. Our approach is grounded in standards such as ARP4761A, MIL-STD-882E, EN50126/8/9, and ISO 26262.

Our safety programs are designed to be certifiable and effective, whether implemented within traditional engineering workflows or integrated with digital and MBSE environments. A cornerstone of our approach is the use of the System Mishap Model (SMM), which helps trace unsafe conditions from top-level system mishaps down to root causes across functional, physical, and software domains.

ModAsfa offers a structured and reusable Hazard Log capability called HazSafe which is built upon the SMM and enables traceable tracking of hazards, mitigations, verification status, and risk levels throughout the lifecycle. This ensures accountability and supports compliance with assurance standards.

Why System Safety?

In complex systems, safety must be engineered into the architecture from the outset to meet regulatory obligations, legal requirements and internal safety objectives. ModAsfa helps clients achieve safety goals through proactive design strategies, quantitative risk assessment, and traceable safety assurance artifacts.

Safety Planning & Strategy

Define safety objectives, applicable standards, and program scope. Establish safety roles, milestones, and deliverables aligned with development timelines.

System Architecture & Safety Requirements

Derive and allocate safety requirements based on hazards and risk assessments. Ensure traceability across system elements and interfaces.

Comprehensive Safety Analysis

Apply a full suite of system safety methods including FMECA, FTA, STPA, ETA, and QRA to identify hazards, assess risk, and support safety-driven design and compliance.

Safety Verification & Validation

Develop verification strategies and tests to demonstrate safety requirements are met. Align test evidence with safety goals and compliance needs.

Safety Case Development

Structure the safety argument using GSN or equivalent methods. Collect supporting evidence to demonstrate compliance and risk acceptance.

Certification & Regulatory Support

Support client engagement with regulatory authorities and certifying bodies. Ensure documentation and safety artifacts meet required standards.

System Safety Expertise

ARP 4761A Methodology

Expertise in safety assessment processes for aircraft systems, including FHA, FTA, and PSSA.

IEC 61508 Certification

Experienced in applying this foundational standard for functional safety across industrial applications.

IEC 31010 Application

Skilled in applying risk assessment techniques to support robust safety decision-making frameworks.

MIL-STD-882E Practices

Skilled in implementing U.S. military system safety processes, including hazard identification, mitigation, and lifecycle safety analysis.

Software Safety Assurance

Specialists in software safety (AOP-52 and JSSSEH) and airworthiness assurance (DO-178) for defence and aerospace systems.

ISO 26262 Compliance

Proficient in managing functional safety for electrical and electronic systems in road vehicles.

Safety Analyses Performed

ModAsfa applies a comprehensive range of industry-standard safety analysis techniques, from early-phase hazard identification through to detailed risk quantification and assurance.

Preliminary Hazard Analysis (PHA) Early-phase screening of potential system hazards to guide risk-based planning.
Functional Hazard Analysis (FHA) Identifies the consequences of functional failures to inform architecture and mitigation.
FMECA Evaluates failure modes, effects, and criticality to prioritize safety-driven design improvements.
Fault Tree Analysis (FTA) Top-down logic analysis of failure combinations that lead to hazardous events.
Common Cause Analysis (CCA) Assesses simultaneous failure risk due to shared components, environments, or dependencies.
Zonal Safety Analysis (ZSA) Evaluates hazards related to spatial arrangement, interference, and physical proximity.
STPA (System-Theoretic Process Analysis) Modern systemic hazard analysis focused on unsafe control actions and interactions.
Software Safety Analysis Identifies software-driven hazards and aligns with assurance needs under DO-178C and DO-330.
Event Tree Analysis (ETA) Forward-looking technique modeling possible outcomes of initiating events.
Quantitative Risk Assessment (QRA) Applies probabilistic methods to assess likelihood, severity, and overall system risk.
Reliability Block Diagrams (RBD) Graphically models system reliability paths and dependency structures.

Contact Us

At ModAsfa we work with leading companies that trust our ability to solve complex projects with agility, precision and commitment.
If you would like to start a conversation with our team, please fill out the form below and we'll get back to you shortly. Prefer to speak with us directly? Call us on 1300 575 336.