Impact of sit-stand exoskeleton on work productivity in metal inert gas welding task

Ahmad Nazri, Ahmad Hanis Haikal (2024) Impact of sit-stand exoskeleton on work productivity in metal inert gas welding task. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

The study investigates the integration of sit-stand exoskeletons in MIG welding environments at Wentel Engineering Sdn. Bhd. Welders face significant ergonomic risk factors such as awkward postures and static positions, leading to musculoskeletal disorders (MSDs). The study aims to identify these risks through ergonomic assessments, utilize sit-stand exoskeletons tailored to welders’ needs to reduce these risks, and evaluate their effectiveness in improving both ergonomics and productivity. Methodologies include observational studies to understand current ergonomic challenges, the development and implementation of custom exoskeletons, and quantitative assessments using RULA scoring and productivity metrics. Additional methodologies involve surveying worker satisfaction and conducting detailed task analyses to ensure comprehensive evaluation. Results show a significant reduction in ergonomic risks, with RULA scores improving from 7 to 3, and all four exoskeletons slightly decreasing productivity. The double-stand exoskeleton design showed the most significant decline in productivity at 58%, highlighting the need for design optimization. Conversely, the single-stand and benchmarked exoskeletons showed smaller productivity declines, indicating potential for refinement. Overall, the exoskeletons enhanced worker health, increased productivity, and promoted sustainable industrial practices, supporting long-term ergonomic and economic benefits. The study concludes that while exoskeletons offer substantial ergonomic advantages, ongoing improvements are necessary to optimize productivity outcomes.

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