Adapting cause and effects methodology to your Safety instrumented system (SIS) to reduce human errors from engineering, operations and beyond
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Mary Kay O'Connor Process Safety Center
Abstract
A safety instrumented system (SIS) is used to implement one or more Safety Instrumented Functions (SIFs) which are designed to reduce the likelihood of hazardous risk by decreasing the frequency of unwanted events (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 state, thus preventing the unwanted accident from occurring. Studies indicate however, that over 50% of all SIS failures are related Systematic faults introduced by 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 idle. 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.
Description
Presentation
Keywords
safety instrumented system (SIS)