Functional Safety
Consulting
IEC 61508 is the foundational standard for functional safety of electrical, electronic, and programmable electronic safety-related systems. We help you navigate the safety lifecycle from hazard identification to validated SIS deployment.
Safety Integrity Levels
SIL quantifies the reliability requirement for a safety function. We have experience with SIL 1 through SIL 3 applications across multiple sectors.
Low demand applications. Common in general manufacturing and utilities.
Medium demand. Required in many oil & gas, chemical, and power generation applications.
High demand. Nuclear, petrochemical, and high-hazard applications.
Our IEC 61508 Services
End-to-end functional safety support — from initial hazard identification to validated system commissioning.
SIL Determination & LOPA
Identify the required Safety Integrity Level for your safety functions. We facilitate Layer of Protection Analysis (LOPA) and SIL determination studies, linking process hazards to SIS requirements.
- LOPA facilitation and documentation
- SIL determination report
- Protection layer inventory
HAZOP Facilitation
Structured Hazard and Operability studies led by experienced facilitators who understand both process engineering and functional safety. We produce actionable recommendations, not just documentation.
- HAZOP study facilitation
- Deviation worksheets and action register
- Risk ranking and prioritization
Safety Requirements Specification
Develop rigorous Safety Requirements Specifications (SRS) that form the basis of your SIS design. We cover safety function description, SIL, safe state, demand rate, and response time requirements.
- Safety Requirements Specification (SRS)
- Functional and integrity requirements
- Verification checklist
SIS Design Review & Architecture Selection
Evaluate SIS architectures for hardware fault tolerance and diagnostic coverage. We calculate PFD/PFH using IEC 61508 / IEC 61511 methods and verify SIL achievement.
- Architecture evaluation (1oo1, 1oo2, 2oo3 etc.)
- PFD/PFH calculation report
- Diagnostic coverage assessment
Safety Lifecycle Management
IEC 61508 requires management of the full safety lifecycle. We help you establish governance for conceptual design through decommissioning, including change management and functional safety audits.
- Functional safety management plan
- Phase-gate review process
- Competency assessment framework
Validation Testing & Commissioning Support
Design and execute validation test plans to verify that the SIS meets the SRS. We develop test procedures, witness testing, and produce the validation test report required for compliance.
- Validation test plan
- Test execution and witnessing
- Validation test report
Sectors We Serve
Functional safety requirements vary significantly by sector and regulatory regime. Our practitioners bring experience across heavy industry applications where SIS failure has real consequences.
Discuss Your ProjectIEC 61508 vs. IEC 61511
IEC 61508 is the umbrella standard for E/E/PE safety-related systems across all sectors. IEC 61511 is the sector-specific application standard for the process industry, derived from IEC 61508.
We work to both standards. In process industry applications we typically apply IEC 61511 (ANSI/ISA-61511), which references IEC 61508 for SIS hardware and software. We'll guide you to the right standard for your context.
Need a SIL determination or HAZOP?
We'll scope the work and give you a fixed-price proposal. No surprises.
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