Supervisor Intervention

“Supervisor Intervention is a credited IPL (Independent Protection Layer) when various criteria are satisfied to assure the effectiveness of the action. It is initiated by alarms or observations. These critical alarms and human intervention system are the second level of protection during normal operation and should be activated by the BPCS (Basic Process Control System).”

Reference: CCPS (Center for Chemical Process Safety. Layer of Protection Analysis: Simplified Process Risk Assessment. 1st Edition