Sherpa and Tafei, comparison of two human error identification techniques; a case study

Abstract

The following paper presents a case study of the analysis of human error in a task performed in a computer equipment repair center. Therefore, a Hierarchical Task Analysis was performed, as well as the application of two human error identification techniques, TAFEI and SHERPA. As a result, TAFEI developed 11 SSDs that helped identify 5 illegal transitions and 5 error modes, one of which was catastrophic. Once the results of TAFEI and SHERPA were analyzed and compared, errors could be found due to the bad execution of the task, bad identification of the equipment being repaired, damages due to bad handling of the materials and errors in the placement of the components.