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Safety Integrity Level


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This course focuses on the principles involved in the design of safety instrumented systems (SIS) that conform to the requirements of ANSI/ISA-61511-2018. (IEC 61511 Mod). In this intensive 2-day course, we will teach you how to evaluate the need for a safety instrumented function (SIF), evaluate potential system architectures, and analyze the system to determine its predicted performance, from both a risk reduction and reliability standpoint.

Combine this course with Layer of Protection Analysis and save!


  • Those who will be involved in the design, evaluation, operation and maintenance of safety instrumented systems
what will i learn in this course?
  • Learn how to design, specify and evaluate performance of safety instrumented functions within a safety instrumented system
  • Learn the importance of good maintenance procedures for the integrity of your systems
  • Gain an understanding of the regulatory requirements for safety instrumented systems
  • 1.2 CEUs, 1.2 COCs, 2.0 CMs, ABIH approval #10-242

Dates & Locations

View our current schedule of virtual or on-site courses at



Day 1: 8:00 a.m. to 5:00 p.m.
  • Introduction
    • OSHA and EPA regulations
    • CCPS guideline documents
    • ANSI/ISA-84.00.01-2004 (IEC 61511 Mod) life cycle
  • Developing the System Requirements
    • Layers of protection and LOPA
    • Inherently safer design
  • Safe Instrumented Function (SIF) Performance Calculations
    • Probability of failure on demand (PFD)
    • Spurious trip rate
  • ANSI/ISA-84.00.01-2004 (IEC 61511 Mod) Overview
    • Safety integrity levels (SIL)
    • Hardware fault tolerance of SIF architectures
    • Proven in use and certified devices and logic solvers
    • Safety requirements specification (SRS)
  • Workshop 1: High Level SIF design for tank overfill scenario
  • Introduction to Devices and Failures
    • Device failure modes
    • Common cause failure
    • Diagnostics
Day 2: 8:00 a.m. to 4:00 p.m.
  • Design Concerns
    • Alarm problem
    • Human factors (man/machine interface)
    • Plant production environment
  • Workshop 2: High Level SIF design for tank overfill scenario revisited
  • Installation, Commissioning and Validation
    • Factory acceptance test (FAT)
    • Site acceptance test (SAT)
  • Operational and Mechanical Integrity
    • Proof tests
    • Compensating measures
    • Bypass management
    • Managing changes
    • Access security
    • Operating with detected faults
  • Workshop 3: SIF design for isostripper addition scenarios
  • Implementing Your Own Program
  • Course Summary and Wrap-up


Mr. Scott Sandler - Senior Process Risk Consultant, ABS Consulting

John Farquharson - Senior Risk/Reliability Engineer, ABS Consulting

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