Functional Safety

Helping the process industry cost-effectively implement the requirements for safety and security standards.


From Functional Safety Assessment to Cybersecurity, exida can show you the way.



Companies around the world turn to exida for help and guidance related to functional safety, alarm management, and cybersecurity. Our team of industry leading consultants have over 400 years of combined knowledge, with extensive experience in Chemical, Oil & Gas, Subsea, Metals and Mining, Pharmaceutical, Pulp & Paper, Power Utilities and Machinery applications.

This unique combination of technical depth and hands on experience enables exida to provide practical solutions to address your most difficult challenges.

exida is the choice of leading companies when it comes to implementing and achieving compliance to the global standards relating to the IEC 61508 and IEC 61511 standards for safety; IEC 62443 for industrial control system cybersecurity; ISA-18.2 for alarm management; and IEC 62061 for safety of machinery.

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Adding Value

Process industry clients need to cost-effectively implement the requirements of the safety and security standards. exida enables this this by creating unparalleled engineering tools that reduce the time and cost of compliance, delivering coaching and training to rapidly develop a knowledge base within the clients organization, offering a full range of lifecycle services to supplement in-house resources, and providing independent assessments to ensure compliance and traceability.

Whatever your needs, exida has you covered.
Let our knowledge be your guide.

Process Safety Management

Developing a Compliant Process Safety Management Program

Process Safety Management (PSM) is an integral part of the plant’s overall management system. PSM is essential in order to properly identify and understand potential process hazards so as to prevent process-related incidents and injuries. A systematic approach to evaluating the whole process is imperative when implementing an effective PSM program. This helps ensure employee and public safety, improve business value and performance, as well as compliance with government regulations. 

exida works with its clients to help develop an efficient PSM program for their organization, which includes an evaluation of current processes to define key elements that may impact such processes. This integrated lifecycle approach leverages activities from multiple disciplines into a coordinated, streamlined process. 

Having a sound Mechanical Integrity program for the Safety Instrumented System (SIS) is just one of the key components to ensuring that there is an appropriate set of Operating and Maintenance policies & procedures in place to ensure the integrity of the plant.  

By having the correct procedures and test plans in place, your safety instrumented system can enjoy years of trouble free service.

Functional Safety Services for the Process Industry

To improve plant process safety, functional safety systems enable the orderly shutdown of processing units when abnormal situations occur that are beyond the capabilities of the regulatory control system or operators to correct or to prevent a catastrophe.

exida makes implementation of safety and high availability automation products easier and more cost effective than ever.

Users now have the ability to use procedures and tools that were written by industry authorities for a fraction of the cost of having them internally developed, and without having to go through the effort of having core staff trained to become safety and reliability experts. This lets you and your staff focus on your core tasks.

The lifecycle is a series of phases from initiation and specifications of safety requirements, covering design and development of safety features in a safety-critical system, and ending in decommissioning of that system. exida provides initial guidance on performing key facets of the lifecycle, providing specific services for individual tasks within each lifecycle phase.

Safety Lifecycle Stage Tasks Supporting Services Supporting Tools
  • Hazard & Risk Analysis
  • Consequence Analysis
  • Identification of protection layers
  • Likelihood analysis
HAZOP Facilitation
PHA Facilitation
Consequence Analysis
LOPA facilitation
  • SIF identification
  • Target risk reduction factor assigned for each SIF
  • Develop Process Safety specification
  • SIF conceptual design:
    • select technology
    • select architecture
    • Determine test plan
    • Perform reliability/safety calculation
SIF assessment
SIL determination
Process SRS development
SIF definition
Equipment justification report
SIL verification
  • Detailed design
  • Factory Acceptance Test
  • SIS Installation & Commissioning
  • SIS Safety Validation
  • Cyber Security Audit
  • SIS Operation & Maintenance
  • Management of Change
  • SIS Decommissioning
Gap analysis
Cybersecurity assessment
Validation Test requirements
Proof Test Requirements
Prior Use justification
Failure data analysis