Safety Instrumented Systems and Functional Safety.

Safety instrumented systems play an important part in the minimisation of risk. The functional safety standards were developed to provide a robust framework for the management of these systems throughout their life, thereby minimising failures in this critical layer of protection.

This module will provide an introduction to the functional safety standards, the underpinning legislation and the concept of the functional safety lifecycle from hazard and risk assessment, shut down system design to testing and maintenance.
This course provides an overview of current tools, industry recognised techniques and methodologies.
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Course Content

  • Computer control in the process sector – where and how computers are used for control and safety.
  • Incidents related to failures of safety instrumented systems.
  • Basics of functional safety provides an overview of the IEC 61508 and IEC 6511 standards
  • The safety lifecycle and functional safety management.
  • Hazard identification and risk analysis covers process hazard analysis and risk assessment and allocation of safety functions.
  • Setting target safety integrity levels (SILs) for safety instrumented functions (SIFs).
  • Developing the Safety Requirements Specification (SRS).
  • Hardware design including the concepts of Probability of Failure on Demand (PFD), safe failure fraction, hardware fault tolerance, proven in use, failure modes, reliability, diversity, separation and the influence of common cause.
  • Software design and the V-model.
  • Verification and validation – on ongoing requirement.
  • Operations, maintenance and repair – key lifecycle phases.
  • Modification – overview of what’s important when undertaking changes to a safety system.

Course Director - Dr Lyn Fearnie, Zento Global