Functional safety

Design and engineering of safety instrumented systems to meet IEC 61511 for the process industry

1-Day Training Course

Course description:

This course on safety instrumented systems (SIS) is specifically intended for systems and engineering service providers in the process industry. The course is structured into three parts:

1. Specifying safety instrumented functions (SIFs) and their SILs
2. Engineering the SIS and SIL verification
3. General: regulatory, standards and compliance issues

The information is carefully structured as a mixture of slides and worked examples on each main topic with frequent questions and answers to ensure that participants are fully engaged.

The introduction describes many examples of SIFs in the process industry and how their safety integrity levels (SILs) are derived. The second (in-depth) session covers what is needed in terms of the system engineering and verification to ensure the SIL is achieved in accordance with BS EN 61511. The essentials of reliability theory and practice, system level hardware reliability modelling and the common statistical methods are all covered. This course is an excellent way to gain the background knowledge required for safety instrumented system practitioners. An excellent foundation before attending SILMETRIC’s 1-day SIS practitioner workshop.

Supporting material:

Each attendee receives a training manual (based on the slides, example procedures, exercises and answers) and a certificate of attendance for each individual’s competence record.

The trainer:

The course is delivered by Paul Reeve CEng, SILMETRIC’s Principal Consultant who has over 15 years’ experience of consultancy and training in functional safety for product designers and systems engineers.

Course Outline

Training Course Outline

1. Determining the safety requirements
• Introduction to the course
• Hazards, risks, risk reduction, ALARP, risk criteria, SIFs and SILs
• Examples of SIFs and SIL determination (LOPA)
• The safety requirements specification
• Q&As / quiz
2. Engineering the SIS and SIL verification
• The SIS lifecycle (framework)
• How systems can fail
• Random hardware and systematic integrity (theory and practice)
• Safety architectures and SIL constraints
• Selection of SIS elements (IEC 61508 compliance or prior use)
• Interpreting the instrument vendor’s safety manual
• SIS reliability calculations (PFD and PFH)
• Estimating reliability parameters by FMEA
• Reliability modeling for SIFs and subsystems (SIL verification)
• Effects of proof test coverage
• Systematic integrity: the SIS lifecycle and safety planning, documentation, modifications, verification and validation, audits, functional safety management (FSM), competence, functional safety assessment (FSA)
• Summary and examples/worksheets
• Q&As / quiz
3. Regulatory, standards and compliance
• The legal position
• Standards overview (BS EN 61508 and BS EN 61511)
• Conformity assessment
• Final Q&As / quiz