Functional Safety and SIS/SIL Consulting

Functional Safety

Practical SIS and SIL support from hazard analysis through operation.

NavonLogic helps process and manufacturing teams turn functional safety requirements into systems that can be designed, tested, operated, and maintained. The work connects process hazards, instrumentation, safety logic, field devices, operating procedures, and lifecycle documentation.

Functional safety capabilities

• IEC 61511 and IEC 61508 lifecycle alignment
• HAZOP and LOPA action review and SIF identification support
• Safety Integrity Level allocation and verification coordination
• Safety Requirements Specification and cause-and-effect review
• SIS architecture, independence, voting, diagnostics, and bypass philosophy

Validation and lifecycle support

• Safety PLC logic, interlock, alarm, and trip-matrix review
• FAT, SAT, functional testing, validation, and startup readiness
• Proof-test procedures, intervals, records, and maintenance handover
• Management of change, impairment, override, and bypass controls
• Vendor scope review and owner-side coordination

Typical engagements

Support may include an independent review of SIS deliverables, closing HAZOP or LOPA actions, translating safety requirements into testable logic, coordinating vendors, preparing validation plans, or resolving lifecycle gaps before startup or after a modification.

Discuss a Functional Safety Project