Musculoskeletal disorders is most common occupational disease in Taiwan, many scholars and researchers in many countries have recognized the issue of musculoskeletal disorders as one of research and development focus areas in occupational health. An amendment of Occupational Safety and Health Act passed in July 2013, and the amendment of draft of Labor Safety and Health Law Enforcement Rules, announced on Nov. 25, 2013, indicating that employers should take preventive strategies for the workplaces with workers suffered from suspected musculoskeletal disorders triggered from repetitive cumulative jobs. The possible strategies include analyzing job content or process and identifying ergonomic factors, etc. Furthermore, Understanding the ergonomic factors for workers with musculoskeletal disorders could be helpful to decide the policy and preventive methods.

The work-related musculoskeletal disorders resulting from the heavy working cause significantly productivity loss in Taiwan. Awkward posture is the predominant risk factor of WMSDs (including over-exertion, high repetition, prolonged exposure, cold and vibration). This awkward posture may bring aches to the neck, shoulder, waist, wrist and other joint.,It may also lead to tiredness and illness of labor.

This study used the techniques of ergonomicintervention to improve the bad posture in workplace. Key Indicators Method (KIM) was applied to evaluate the effectiveness of the intervention. The results showed that risk of material mixing was reduced to level 2 from level 3. In General, the WMDs risk of invervented material mixing cases were significantly improved in workplace.