Merry Siska, - and AISYAH AULIA HARAHAP, - (2022) Improvement in Body Posture of Sumedang Tofu Small Enterprise Workers Using Workplace Ergonomic Risk Assessment (WERA). ndustria: Jurnal Teknologi dan Manajemen Agroindustri, 11 (2). pp. 128-138. ISSN ISSN 2252-7877 (Print) ISSN 2548-3582 (Online)

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Abstract

This study aims to analyse the work body postures, to determine the work risk level before and after the improvement using the Workplace Ergonomic Risk Assessment (WERA) and to improve the workstation by designing ergonomic production tools. An empirical study was carried out at a small industry producing Sumedang Tofu at Rimbo Panjang, Pekanbaru, Indonesia. The workers must bend their body to move 77 kg soybeans with an 11 kg single-lifting capacity. The level of work risk was determined using the Workplace Ergonomic Risk Assessment (WERA) method based on nine categories, i.e., shoulders, wrists, back, legs, neck, strength, vibration, contact pressure, and work duration. The soaking and milling stations scored 35 and 31 using the WERA method. The two scores indicated an average performance level that requires improvement. Anthropometric data were used to develop tools for improving workers' body posture. The new tool used for soaking and milling has footrests, so workers did not have to reach too far above their chests to move the soybeans to the milling. The soaking station and the milling station both achieved a score of 24, which is considered as a low level, indicating that neither station requires improvement. Time reduction after the body posture improvement was 3.33 seconds for the milling station and 2.08 seconds for the soaking station. Keywords: anthropometry, soybean, posture improvement, workplace ergonomic risk assessment

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