Purpose: Workplace accidents in welding and assembly manufacturing in Indonesia remain a key safety issue. This study examines the relationship between knowledge, age, education, and work tenure and accident occurrence among workers at PT. X, Batam.
Methodology: A quantitative cross-sectional study was conducted on 30 welding and assembly workers using total sampling. Data were collected through structured questionnaires. Occupational Safety and Health (OHS) knowledge was measured using a validated instrument, while demographic data were self-reported. Accident experience was classified as ever or never. Chi-square test (? = 0.05) was applied.
Results: Univariate analysis showed 56.7% had experienced accidents; 40% had low OHS knowledge, 63.3% were under 35 years, 73.3% had low education, and 53.3% had short tenure. Chi-square tests indicated significant associations between accidents and knowledge (p = 0.000), age (p = 0.013), education (p = 0.014), and tenure (p = 0.000).
Conclusions: All four factors are significantly associated with workplace accidents, with knowledge and tenure showing the strongest relationships and priority for intervention. These findings highlight the importance of strengthening occupational safety culture in manufacturing workplaces.
Limitations: Small sample size and single-company scope limit generalizability and causal inference. Future studies should include larger samples and multiple sites to improve external validity.
Contributions: Findings support targeted OHS training and structured onboarding to reduce accidents in welding and assembly work. The study also provides empirical evidence for policy development in similar manufacturing settings.