PEMETAAN DAN MITIGASI ERROR TRAPS MENGGUNAKAN METODE WALK-THROUGH TALK-THROUGH PADA PEKERJAAN PENGECORAN LOGAM PT X

• Main Author: Alam Prasetyo, Panggah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85931
• Institution: Institut Teknologi Bandung

Melting is a job with the highest accident rate, reaching 50%, at the Foundry Plant of PT X during the 2022-2023 period. The interventions implemented, such as the use of HIRADC and supporting safety activities, have proven to be insufficient in preventing workplace accidents due to the presence of additional contributing factors known as error traps. Three error traps with the highest severity levels were identified and mitigated through engineering controls. Observations and interviews using the Walk-Through Talk-Through (WTTT) method were conducted to easily and quickly identify error traps, a method that has not been widely used in research. Meanwhile, engineering control mitigation was carried out through needs identification, concept generation, and concept selection. Out of a total of 18 routine tasks involving 11 operators as sources, 56 error traps were identified with the percentage distribution of people-related factors at 36%, task-related factors at 41%, and organizational-related factors at 23%.. The classification results indicated that the most frequently encountered subfactors of error traps included unclear signs or signals, work experience, unfamiliar or rare situations, and the trust in equipment. The application of WTTT in identifying error traps can be performed easily and yields sufficiently detailed results. However, the classification results tend to indicate that the distribution of error traps occurs due to task-related factors. This may be attributed to the WTTT process, which allows for closer observation of the work being performed. The first error trap occurred during the melting task to ensure that there was no water in the charging box when charged into the furnace. The second error trap occurred during the washing ladle task when the crane operator placed the ladle into a safe parking jig. The third error trap was identified during the pouring task when the operator aligned the nozzle with the pouring cup using the molten metal's flame for guidance. The mitigation for the highest-ranking error trap involved the design of drainage in the scrap charging box; the second error trap involved a mechanical signal to ensure the parking jig's safety; and the third error trap involved a mechanical scoop to ensure precision in the molten metal's flame.