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in objective between environmental assessments subjective of manufacturing association plants and factors ergonomic

Association between objective and subjective assessments of environmental ergonomic factors in manufacturing plants
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Association between objective and subjective assessments of environmental ergonomic factors in manufacturing plants

Iman Dianat b, *, Abdollah Vahedi a, Sara Dehnavi a
a Department of Health and Safety, Safa University of Applied Science and Technology, Saveh, Iran
b Department of Ergonomics, Tabriz University of Medical Sciences, Tabriz, Iran

Abstract

The association between objective and subjective assessments of environmental ergonomic factors including noise, lighting and heat were conducted in a field study in three manufacturing plants. Data were collected from 130 workstations using questionnaire and physical measurements of the noise (noise dosimetry), lighting (task area illuminance) and heat (wet bulb globe temperature – WBGT) levels. The recommended noise, illuminance and WBGT levels were not met in about half of the workstations surveyed, which was in agreement with low satisfaction levels with the environmental factors in the workplace. A considerable effect of the environmental factors was found on perceived workers' job performance, safety and health. The results from contingency coefficient analysis indicated a relatively good agreement between the measured noise, illuminance and WBGT levels and the workers' perception of these factors. The results suggest that quantitative physical measurements should be supplemented by qualitative subjective assessments to provide more specific and additional details about the environmental conditions in each workplace and consequently to improve workers' satisfaction, job performance, safety and health
Relevance to industry

The findings highlight the importance of environmental ergonomics and have implications for improvements in the design of the workplace to enhance workers' satisfaction, job performance, safety and health on areas where the environmental factors are not favourable. A better understanding of the environmental conditions and their effects in each working environment has the potential for a notable impact on productivity and workers' quality of life

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