Expert functional safety engineering services ensuring compliance with IEC 61508 and IEC 61511 standards throughout the complete Safety Life Cycle for process industry applications.
IEC 61508 & IEC 61511 Compliance Specialists
Comprehensive functional safety services from hazard identification through to Safety Instrumented System (SIS) design, implementation, and lifecycle management in accordance with international standards.
IEC 61508 Compliance
Functional safety of electrical/electronic/programmable electronic safety-related systems. Lifecycle approach from concept through to decommissioning, ensuring systematic safety integrity for all E/E/PE systems.
IEC 61511 – Process Industry SIS
Safety Instrumented Systems for the process industry sector. Specification, design, installation, operation and maintenance of SIS to achieve required risk reduction and Safety Integrity Levels (SIL 1-4).
SIL Determination & Verification
Systematic determination of required Safety Integrity Levels through LOPA (Layer of Protection Analysis), risk matrices, and risk graphs. SIL verification calculations ensuring achieved SIL meets requirements.
Functional Safety Life Cycle
Complete lifecycle management from hazard and risk assessment through design, implementation, operation, maintenance, modification, and decommissioning.
Phase 1: Analysis
Hazard & Risk Assessment
- Process hazard identification (HAZID)
- Hazard and operability studies (HAZOP)
- Risk assessment and evaluation
- Safety requirements specification
SIL Allocation
- Risk reduction target determination
- LOPA (Layer of Protection Analysis)
- SIL assignment to safety functions
- Safety requirement specification (SRS)
Phase 2: Design & Engineering
SIS Design
- Safety instrumented function (SIF) design
- SIS architecture selection (1oo1, 1oo2, 2oo3)
- Component selection (SIL-rated devices)
- Cause & effect diagrams
SIL Verification
- PFD (Probability of Failure on Demand) calculations
- Hardware fault tolerance analysis
- Systematic capability verification
- Common cause failure analysis
Phase 3: Implementation
Installation & Commissioning
- Factory Acceptance Testing (FAT)
- Site Acceptance Testing (SAT)
- SIF proof testing procedures
- Installation verification
Validation
- Pre-startup safety review (PSSR)
- SIS functional testing
- Safety validation documentation
- Safety manual development
Phase 4: Operation & Maintenance
Operations Phase
- Proof test planning and execution
- Periodic functional testing
- SIS performance monitoring
- Incident investigation and reporting
Management of Change
- SIS modification assessment
- Impact analysis on safety integrity
- Re-verification after modifications
- Periodic safety review and audits
Safety Studies & Assessments
- HAZID (Hazard Identification)
- HAZOP (Hazard and Operability)
- LOPA (Layer of Protection Analysis)
- SIL determination workshops
- Quantitative Risk Assessment (QRA)
- Pre-startup safety reviews
SIS Engineering
- Safety Requirement Specification (SRS)
- Safety Integrity Level verification
- Reliability calculations (PFD, PFH)
- SIF design and architecture
- Logic solver programming & testing
- Bypass and override management
Documentation & Compliance
- Safety case development
- Functional Safety Management Plan
- Functional Safety Assessment (FSA)
- SIS design documentation
- Proof test procedures
- Safety lifecycle audit reports
Key Safety Standards
IEC 61508
Generic functional safety standard for all safety-related systems. Defines Safety Integrity Levels (SIL 1-4) based on risk reduction requirements and systematic approach to safety lifecycle management.
IEC 61511
Process industry specific application of IEC 61508. Addresses complete safety lifecycle for Safety Instrumented Systems including design, operations, maintenance, testing, and modification of SIS.
Supporting Standards
- IEC 61508 Parts 1-7
- IEC 61511 Parts 1-3
- ISA TR84.00.02 (SIF verification)
- IEC 62061 (Machinery safety)
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