| Sumario: | Background: Visual inspection workers are always performing under various ergonomic factors and are more vulnerable to the effects of physical and organizational aspects, since their work deals highly with cognitive functions and the impact of ergonomic factors has to be identified in automotive industries to improve work performance. Objective: To study the combined effect of ergonomic factors that may have an impact on the performance of visual inspection workers in the automotive industry. Methods: In this experimental study combined factors such as postures (standing, sitting, Sit-stand) and work shifts (A shift, B shift, C Shift) have been studied at three levels. The study was conducted among selected employes (n = 10) in the automotive manufacturing industry in 2023. During the study, the visual inspectors' work performance was measured using the error study, and the cognitive functions of visual inspectors' were evaluated by taking the Digit Symbol Substitution Test (DSST). Results: The study established that postures significantly impact work performance at 40.08% and cognitive functions at 36.25%. Work shifts significantly impact work performance with 18.18% and cognitive functions with 26.62% of visual inspectors' in the automotive industry. The combined effect of postures and work shifts has significantly impacted the visual inspectors' performance with 13.29% on work performance and 10.12% on cognitive functions. Conclusions: This study draws the inference that individual and combined factors (Posture and Work shift) both possess a significant impact on the work performance and cognitive functions of visual inspectors' in the automotive manufacturing industry.
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