Identification and assessment of Human Error in Cabin Roofed Crane Using SHERPA and SPAR-H Techniques

  Introduction: Human errors play a significant role in the occurrence of industrial accidents.  This study aims to investigate the human errors in cabin roof crane operators of a metal industry using SHERPA and SPAR-H techniques.        Material and Method: In this research, first, all of the tasks of the tower crane operator were identified and analyzed. Then, adopting SHERPA technique, probable operator errors were identified in each task and the control modes and error probability were determined by and SPAR-H technique.  Results: Analysis of SHERPA worksheets showed that a total of 217 errors were identified, of which 41% were functional, 21% review, 13% recovery, 15% communication and 10% selective. . According to the results of risk assessment, 38% of errors at the level of risk are unacceptable, 26% are undesirable, 14% are acceptable but need to be reconsidered and 22% are acceptable without the need for reconsideration. H The highest probability of error was related to the three sub-tasks of longitudinal motion, transverse motion, and high and low motion (0.3712). The lowest probability of error was below the task of recording shift reports and transmitting information orally and in writing (0.001). Conclusion: the highest type of error detected is the functional type and the highest probability of error in cargo handling along the route (0.3712) and in this regard to reduce the error, the necessary corrective measures to improve The work process and the reduction of human error were made available to the personnel of the crane unit