Analysis of the impact of the increase of production volume on the material supply system and work in process through simulation scenarios

Gomez, Jacob Ortega; García, José Alfredo Jiménez; Arriaga, Andrea Verónica Balderas; Lira, Armando Javier Ríos

doi:10.1504/ijscor.2018.093285

Cited by 1 publication

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“…Industrial work is oriented towards increased automation, with the worker primarily engaged in the operation, driving, and supervision of machinery in a production line. ( Gómez et al 2018 ; Cimini et al 2021 ). Nevertheless, work-related musculoskeletal disorders (WRMSD) persist as a prevalent issue among this workforce ( Yang et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Myotonometry in machinery operators and its relationship with postural ergonomic risk

Urrejola-Contreras,

Martínez,

Rodríguez-Bagó

et al. 2024

Annals of Work Exposures and Health

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Objectives To analyze the association between occupational ergonomic risk, personal characteristics, and working conditions with the biomechanical properties of stiffness and muscular tone in the paravertebral muscles of electric pallet jack and forklift operators in the industrial sector. Methods A total of 75 industrial sector machine operators were evaluated in 2021. Personal characteristics and working conditions were assessed through a questionnaire. Ergonomic risk was assessed using the Rapid Entire Body Assessment (REBA) method, and biomechanical properties of stiffness and muscular tone were obtained using the Myoton Pro device. Stiffness in paravertebral muscles was compared based on the operated machine and observed ergonomic risk. A multilevel linear regression model was employed to quantify the relationship, with mean differences and 95% CI calculated. Results Very high ergonomic risk was found in 75% of the electric pallet truck drivers. In this group with the highest ergonomic risk, an association between biomechanical properties and older workers was observed. Additionally, among electric pallet truck drivers, stiffness (mean difference 335.9 N/m, 95% CI: 46.4 (3.4 to 110.0), P < 0.05) and paravertebral muscle tone (mean difference 17.5 Hz, 95% CI: 1.4 (0.1 to 3.4), P < 0.05) showed statistically significant differences in the very high ergonomic risk category compared to the high-risk category. No significant differences were observed in any of the analyzed variables among forklift drivers. Conclusions Workers operating electric pallet trucks with very high ergonomic risk according to the REBA method and aged over 40 yr are associated with increased muscle stiffness and tone.

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Section: Introductionmentioning

confidence: 99%