Electrical & Technical Audits

Instrumentation & Control Systems Audit

The Instrumentation & Control Systems Audit evaluates the reliability, accuracy, and safety of automation and control systems within a process facility. We assess the condition of sensors, transmitters, PLCs, DCS, and crucially, the Safety Instrumented Systems (SIS). This audit ensures that processes remain within safe operating limits, alarms function correctly, and automated safety interlocks operate flawlessly when required to prevent process safety incidents.

Aim

To verify the reliability and integrity of process control and safety instrumented systems, ensuring safe, stable, and efficient plant operations.

Scope of Audit

Evaluation of the architecture and reliability of DCS/PLC systems

Assessment of Safety Instrumented Systems (SIS) and Safety Integrity Levels (SIL)

Review of alarm management systems and response procedures

Inspection of critical sensors, transmitters, and final control elements (valves)

Evaluation of calibration programs and traceability of standards

Assessment of logic modifications and management of change (MOC) for software

Review of power supply redundancy (UPS) for critical control systems

Evaluation of cybersecurity measures for industrial control systems (ICS)

Assessment of environmental conditions in control rooms and rack rooms

Review of interlock bypass procedures and authorizations

Evaluation of operator interfaces (HMI) for clarity and human factors

Checking documentation accuracy (P&IDs, loop diagrams, logic narratives)

Key Outcomes

Assessment of the reliability and availability of critical control systems
Identification of vulnerabilities in Safety Instrumented Systems
Evaluation of alarm system effectiveness (identifying alarm floods/nuisance alarms)
Report on the robustness of calibration and maintenance practices
Assessment of risks related to control system cybersecurity and obsolescence
Recommendations for improving process stability and safety through automation

Key Benefits

Prevention of process safety incidents due to control system failures

Improved product quality and process efficiency through accurate control

Reduction in unplanned shutdowns caused by instrumentation faults

Enhanced situational awareness and response capabilities for operators

Assurance of functional safety compliance (e.g., IEC 61511)

Mitigation of cyber threats to critical industrial infrastructure

Audit Support

Conducting SIL assessment, verification, and validation studiesDevelopment of alarm management philosophies and rationalization exercisesDesigning and implementing robust calibration management systemsUpgrading legacy control systems and mitigating obsolescence risksIndustrial control system (ICS) cybersecurity vulnerability assessmentsEstablishing rigorous Management of Change (MOC) procedures for automationProviding specialized training on SIS and functional safetyAssistance in optimizing control loop tuning for better performanceUpdating critical instrumentation documentation (P&IDs, cause and effect matrices)Support in designing ergonomic and effective control room environments

Why Choose ABHIRUP?

Specialized automation and control engineers with process safety expertise
In-depth knowledge of functional safety standards (IEC 61508/61511)
Capability to audit complex, highly automated process environments
Focus on the crucial interface between automation, process dynamics, and human operators
Forward-looking approach addressing both reliability and emerging cybersecurity risks

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Instrumentation & Control Systems Audit

Aim

Scope of Audit

Key Outcomes

Key Benefits

Audit Support

Why Choose ABHIRUP?

Related Services

Electrical Safety Audit

Electrical Compliance Audit

Mechanical Safety Audit

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