(147c) Adapting Cause and Effects Methodology to Your Safety Instrumente System (SIS) to Reduce Human Errors from Engineering, Operations and Beyond

Fialkowski, C., Siemens
Title: Adapting cause and effects methodology to your Safety instrumented system (SIS) to reduce human errors from engineering, operations and beyond


A Safety Instrumented System (SIS) is designed to reduce the likelihood of hazardous risk by decreasing the frequency of unwanted accidents. The amount of risk reduction that an SIS can provide is represented by its safety integrity level (SIL). The SIS is designed to detect when the process reaches a hazardous condition and respond accordingly to move the process to a safe, thus preventing the unwanted accident from occurring. Studies indicate however, that over 50% of all SIS failures are related to human error. While many SIS systems boast having SIL 3 certification, it’s often the human interactions that render many of these well intended systems to be essentially non-existent. A cause and effects methodology is an approach many in the industry are exploring to help reduce human errors throughout the entire safety lifecycle of the SIS.

What attendees will learn 

In this session attendees will learn how a safety interlock matrix can help reduce human errors during key phases of the lifecycle:

  1. Provide intuitive cause and effect diagrams for input in the Safety Requirement Specification (SRS)

  2. Reduce translation errors during the design and engineering phase

  3. Help to validate the SIS during installation and commissioning

  4. Maintain system integrity during operation and maintenance

  5. Provide traceability for changes after commissioning

Speaker's name and contact information

Charles Fialkowski, CFSE



Brief bio of speaker 

Charles M. Fialkowski, C.F.S.E. (Certified Functional Safety Expert) has been a Safety Systems Specialist for more than 20 years, with a focus on process safety. He served as Chairman for ISA's Safety Division for both Burner Management (BMS) and Fire and Gas systems (F&G) and a member of the ISA's technical committee ISA84 on Safety Systems. He has instructed ISA's BMS, LOPA and SIS courses, published numerous papers on Safety Instrumented Systems, and is a developer of a BMS course for Exida.com. Mr. Fialkowski holds a BSEE from Oklahoma State University and is the National Process Safety Manager for a global automation supplier.


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