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All Journal Jurnal Optimasi Sistem Industri

Mirta Widia

Universiti Malaysia Pahang Al-Sultan Abdullah

Author-ID : 7099093

Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Ergonomic Risk Assessment of Warehouse Workers in the Courier Service Industry: A Case Study from Kuantan, Malaysia Alya Nadhirah binti Ismail; Mirta Widia; Ezrin Hani binti Sukadarin; Wan Norlinda Roshana Binti Mohd Nawi; Mohammad Faizal bin Zainal Abidin
Jurnal Optimasi Sistem Industri Vol. 23 No. 1 (2024): Published in July 2024
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

The global surge in demand for courier services has introduced both benefits and challenges. Courier workers face immense pressure to handle large volumes of orders, leading to increasing cases of health and occupational injuries. The lack of ergonomic interventions in their work highlights the urgent need for ergonomic assessments in the courier industry. In Malaysia, current ergonomic risk assessments for warehouse courier workers are insufficient, making it essential to identify prevalent musculoskeletal disorders (MSDs) and determine the associated risk factors and levels posed by their daily tasks. This study aimed to address this gap by conducting ergonomic risk assessments among 35 warehouse workers using the Cornell Musculoskeletal Discomfort Questionnaire (CMDQ), the Initial Ergonomic Risk Assessment (ERA) Checklist, and Rapid Entire Body Assessment (REBA). Three different work tasks were observed: scanning and sorting, tiered storage and stacking, and load unloading. The findings revealed that lower back pain was the most common ailment (14.5%), followed by hip pain (8.39%) and neck pain (7.89%). The tiered stacking storage activity posed the highest ergonomic risk, with identified risk factors including awkward postures, static and sustained activity, and repetitive tasks. The REBA analysis indicated a very high-level risk for tiered stacking storage, necessitating immediate ergonomic interventions. These findings contribute to the field of ergonomics and provide valuable insights for safety practitioners, ergonomists, researchers, and academicians in occupational safety and health and the courier service industries.

OSH Management in Small and Medium Enterprises: A Bibliometric Review Sofia Afifah Hazemi; Noor Diana Abdul Majid; Mirta Widia; Hanida Abdul Aziz
Jurnal Optimasi Sistem Industri Vol. 24 No. 1 (2025): Published in June 2025
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Sustainable Small and medium-sized enterprises (SMEs) are crucial to economic growth but face significant challenges in occupational safety and health (OSH). SMEs often lack the resources, expertise, and institutional support needed to manage OSH effectively, leading to higher rates of workplace accidents. This study addresses the lack of thematic synthesis and trend forecasting by offering a structured overview of the field's intellectual landscape. Using bibliographic coupling and co-word analysis, we identified key research themes, emerging trends, and influential studies. Data were collected from the Web of Science (WoS) Core Collection (1990 to 2024) yielding 552 initial records. After screening, 393 journal articles were analysed, with a total of 6,408 citations (6,181 excluding self-citations), an average of 16.31 citations per item and an H-index of 39. Applying a 30-citation threshold, 54 highly cited papers were subjected to bibliographic coupling, revealing six thematic clusters. The analysis indicates four prominent clusters: (1) the role of human resources in OSH programs, (2) health certifications and safety management systems, (3) employee perceptions of OSH efforts, and (4) the development of OSH models tailored to SMEs. Consequently, our findings demonstrate that OSH research in SMEs is steadily evolving toward more integrated, systematic management approaches. These insights suggest that enhancing OSH outcomes requires targeted strategies including strengthening human resource roles, adopting formal safety frameworks, emphasizing risk assessment and staff training, and implementing standardized practices fit for the SME context.

Factors Affecting Personal Hearing Protector (PHP) Use Among Industrial Workers: Development and Validation of the Questionnaire Nur Syafiqah Fauzan; Ezrin Hani Sukadarin; Mirta Widia; Muhammad Faizal Zainal Abidin
Jurnal Optimasi Sistem Industri Vol. 24 No. 2 (2025): Published in December 2025
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v24.n2.p286-304.2025

Personal hearing protectors (PHPs) used by industrial workers have already been a preferred measure in various industrial sectors that have issues with excessive noise exposure. Although personal hearing protectors (PHPs) are widely provided across industrial workplaces, actual worker compliance with their consistent and correct use remains notably low. Therefore, this study aimed to develop a valid measure to evaluate factors affecting PHP use among industrial workers in Malaysia. A questionnaire was developed on the factors affecting PHP use among industrial workers in Malaysia. The questionnaire comprised several items and was created using a systematic, thorough process consisting of three stages: (i) formulating items, (ii) translating them back-to-back, and (iii) subjecting them to expert content assessment by six (6) panels of experts. The questionnaire constructs and items were evaluated for content validity and reliability. The content validity score for each item was considered satisfactory. The Cronbach’s alpha was 0.940, indicating high overall internal consistency. The domain coefficients were as follows: interpersonal influence, 0.899; perceived severity, 0.902; perceived benefit, 0.868; perceived barrier, 0.893; perceived self-efficacy, 0.879; cues to action, 0.815; and use of PHP, 0.840. The domain coefficients demonstrated good to high internal consistency, ranging from 0.815 (cues to action) to 0.902 (perceived severity). This study shows that the questionnaire on factors affecting PHP use among industrial workers is valid and well-structured. Therefore, this study provides a valid and reliable tool for assessing factors influencing PHP use, which can inform the planning of targeted noise management programs.

Co-Authors Alya Nadhirah binti Ismail Ezrin Hani binti Sukadarin Ezrin Hani Sukadarin Hanida Abdul Aziz Mohammad Faizal bin Zainal Abidin Muhammad Faizal Zainal Abidin Noor Diana Abdul Majid Nur Syafiqah Fauzan Sofia Afifah Hazemi Wan Norlinda Roshana Binti Mohd Nawi

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