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In India, the cashew nut shelling (CNS) is an important task in all small-scale cashew nut processing industries. Workers engaged in CNS task commonly operate pedal-operated cashew nut sheller (CNSR) in awkward standing posture that can contribute to work-related musculoskeletal disorders (MSDs). However, investigations from an ergonomics perspective have barely been conducted in Indian small-scale cashew nut processing industries. Therefore, the present study aims to evaluate the postural workload in CNS task to propose an ergonomic design intervention in small-scale cashew nut processing industries. A combination of methods, including posture recording, postural assessment, interviews, questionnaire study, virtual prototyping, and digital human modeling and simulation, were used. Using the pedal-operated CNSR resulted in high-risk postures of MSDs. Based on these preliminary findings, a simple, improved, and adjustable hand-operated CNSR was designed and evaluated ergonomically. It was found that newly designed CNSR improved postures noticeably and provided comfort for workers.

Ergonomic design and simulation-based evaluation of a new cashew nut sheller