Prediction techniques active site identification

ABSTRACT Permit To Work (FTW) is a means of safety system to coordinate different work activities. However, it may be susceptible for human error. The purpose of this study was identification and analysis of human errors in PTW system using Predictive Human Error Analysis (PHEA) technique. The most important identified errors were inadequate isolation of process equipments, inadequate labelling of equipment, and delay in starting the work after issue the work permit, improper gas testing, inadequate site preparation measures etc. Finally for preventing and recovering from the identified errors, site work permit form and its procedure was revised. 

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