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Incidence of Stress and Psychosocial Factors on Musculoskeletal Disorders in CAD and Data Entry

Cail F., Aptel M.

International Journal of Occupational Safety and Ergonomics

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2005

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Vol. 11, No. 2

119--130

EN

A comparative study concerning the incidence of psychosocial factors and stress on musculoskeletal disorders (MSD) was conducted on 30 males carrying out a computer-aided design (CAD) task and on 26 females carrying out a data entry task. Both populations completed a questionnaire concerning complaints of MSD, stress symptoms, psychosocial factors and working life. This study showed that the work context was more favourable to the data entry task operators than to the CAD task operators. In addition, there were relationships in CAD and in data entry between complaints of MSD and stress variables as well as between anguish and psychosocial factors. This field study has shown the importance of stress and of the work context in the occurrence of MSD in computer work.

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Biomechanical Stresses in Computer-Aided Design and in Data Entry

Cail F., Aptel M.

International Journal of Occupational Safety and Ergonomics

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2003

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Vol. 9, No. 3

235--255

EN

A study of the risk factors of musculoskeletal disorders (MSDs) of the upper limbs was carried out on 2 populations, 1 performing a computer-aided design (CAD) task and the other performing a data entry task. A questionnaire on MSD complaints and working life was completed by a sample of each population. Biomechanical measurements of the forces, the angles, and the repetitiveness of movements of the upper limbs were carried out on some operators in each sample. It emerged that complaints of the upper limbs seem to be linked to the use of input devices. The grip forces exerted when using the keyboard and mouse were higher in CAD than in data entry.

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Integration of Ergonomics Into Hand Tool Design: Principle and Presentation of an Example

Aptel M., Claudon L., Marsot J.

International Journal of Occupational Safety and Ergonomics

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2002

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Vol. 8, No. 1

107--115

EN

The development of ergonomic tools responds to health protection needs on the part of workers, especially the work related musculoskeletal disorders of the upper limbs and to the development of ergonomic tools to take into account the needs of the factories. Only an ergonomic design process can enable tool manufacturers to meet these requirements. Three factors are involved: integration of ergonomics into the design process, definition of the different ergonomic stages involved, and finally knowledge of the different factors involved in hand tool design. This document examines these 3 elements in more detail and presents briefly a project of research whose main purpose is to integrate ergonomic criteria into a design process.