ADAPTING CAUSE AND EFFECTS METHODOLOGY TO YOUR SAFETY INSTRUMENTED SYSTEM(SIS)TO REDUCE HUMAN ERRORS FROM ENGINEERING,OPERATIONS AND BEYOND

摘要

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 state,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.