Posture Analysis of Workers in Bare Core Production Workers using the Index and Job Strain Method Assessment of Repetitive Task Tool

Abstract

The study was conducted using the Job Strain Index (JSI) method and the Assessment of Repetitive Task (ART) tool to determine the risk of muscle injury arising from work activities carried out.The objects of this study were six workers at six work stations, namely: (1) cutting 1 workstation, (2) removal and cutting work station, (3) surface planner 1 work station, (4) surface planner 2 work station, (5) gang rip workstation, and (6) conveyor workstation. The stages in the JSI method are collecting 6 task variable data, namely: intensity of effort, duration of effort, effort per minute, hand/wrist position, work speed, and work duration per day. The stages in the ART Tool are (1) frequency and repetition, (2) hand strength, (3) awkward postures, (4) additional factors, (5) task score and exposure score, (6) presentation of the results.The results of calculations using the JSI method, from 11 work activities there are 5 work activities with the low-risk level and 6 work activities with the moderate risk level. The results of calculations using the ART Tool method, there are 6 work activities with the moderate risk level and 5 work activities with the high-risk level. Proposed improvements made are adding a table for surface planner 1 workstation and changing the chair design by adding chair height, adding footrests, and backrests for the body for surface planner 1 and surface planner 2 workstation. The results of the redesign of the workstation can reduce the score ART Tool up to 48%.