1. Human Engineering Evaluation of Street Cleaners’ MSDs Symptoms

2. Reason of subject selection The aim of project Survey from Street cleaners What is MSDs(about MSDs) RULA system - A nalysis of evaluation group 1&2 Improvements Gantt chart Q & A

3. Reason for selection  We want to get the point of level of job stress and MSDs symptoms for street cleaners, also we want to investigate the relationship between job stress and MSDs symptoms. ▶ Identify the level of job stress from Street cleaners ▶ Identify the level of work-related musculoskeletal symptoms in body parts from street cleaners ▶ Identify the independent correlation between work-related musculoskeletal sy mptoms and job stress from street cleaners

4.  Human Engineering Evaluation of Street Cleaners’ MSDs Symptoms  Way to reduce overloading of the amount of work  Preventive management of MSDs

5. Survey from street cleaners Place : Seoul Ages : All ages Respondents : Street cleaners from Seoul Total : 299

6. Survey from street cleaners Ages Years of service

7. Survey from street cleaners

9. What is MSDs? M usculoskeletal disorders (MSDs) are injuries or pain in the body's joints, ligaments, muscles, nerves, tendons, and structures that support limbs, neck and back. MSDs can arise from a sudden exertion, or they can arise from making the same motions repeatedly repetitive strain, or from repeated exposure to force, vibration, or awkward posture. E xamples of specific MSD disorders are carpal tunnel syndrome, Lowback pain and Tension Neck Syndrome.

10. Evaluation Group 1

11. Posture analysis of RULA An action of picking up trash

12. Table A-1 upper arm lower arm wrist posture score 1234 wrist twist 12121212 1 112222333 222223333 323333344 2 123333444 233333444 334444455 3 133444455 234444455 344444555 4 144444555 244444555 344455566 Score A

13. Posture analysis of RULA No support things, unbalanced posture : +2points

14. Table B-1 Neck posture score trunk posture score 123456 legs 121212121212 1132334556677 2232345556777 3333445566777 4555667777788 5777778888888 6888889999999 Score B

15. Table C-1 1234567+ 11233455 22234455 33334456 43334566 54445677 64456677 75566777 85567777 Score C Score D Score B (6) + Muscle (1) + Force (0) = Score D (7) Score A (4) + Muscle (1) + Force (0) = Score C (5) Grand Score (7)

16. The RULA System Wrist twist Wrist Lower arm Upper arm Legs Trunk Neck A B Muscular use Power ++ ++ Score C = = Posture score by using graph A Power Use score Action level Score D Muscular use Posture score by using graph B Posture score by using graph C 3 2 3 1 3 4 2 6 4 1 1 0 0 5 7 7 4

17. Action level # The requirements for action into which the grand scores are divided is summarized into Action levels as follows. Action level 1 : A score of 1 or 2 indicates that posture is acceptable If it is not maintained or repeated for long periods. Action level 2 : A score of 3 or 4 indicates that further investigation is needed and changes may be required. Action level 3 : A score of 5 or 6 indicates that investigation and changes are required soon. Action level 4 : A score of 7 indicates that investigation and changes are required immediately.

18. Evaluation Group 2

19. Posture analysis of RULA An action of putting trash

20. Table A-2 upper arm lower arm wrist posture score 1234 wrist twist 12121212 1 112222333 222223333 323333344 2 123333444 233333444 334444455 3 133444455 234444455 344444555 4 144444555 244444555 344455566 Score A

21. Posture analysis of RULA No support things, unbalanced posture : +2points

22. Table B-2 Neck posture score trunk posture score 123456 legs 121212121212 1132334556677 2232345556777 3333445566777 4555667777788 5777778888888 6888889999999 Score B

23. Table C-2 1234567+ 11233455 22234455 33334456 43334566 54445677 64456677 75566777 85567777 Score C Score D Score B (6) + Muscle (1) + Force (0) = Score D (7) Score A (3) + Muscle (1) + Force (0) = Score C (4) Grand Score (6)

24. The RULA System Wrist twist Wrist Lower arm Upper arm Legs Trunk Neck A B Muscular use Power ++ ++ Score C = = Posture score by using graph A Power Use score Action level Score D Muscular use Posture score by using graph B Posture score by using graph C 2 2 0 3 3 4 2 6 3 1 1 0 0 4 7 6 3

25. Action level # The requirements for action into which the grand scores are divided is summarized into Action levels as follows. Action level 1 : A score of 1 or 2 indicates that posture is acceptable If it is not maintained or repeated for long periods. Action level 2 : A score of 3 or 4 indicates that further investigation is needed and changes may be required. Action level 3 : A score of 5 or 6 indicates that investigation and changes are required soon. Action level 4 : A score of 7 indicates that investigation and changes are required immediately. Action level 1 : A score of 1 or 2 indicates that posture is acceptable If it is not maintained or repeated for long periods. Action level 2 : A score of 3 or 4 indicates that further investigation is needed and changes may be required. Action level 3 : A score of 5 or 6 indicates that investigation and changes are required soon. Action level 4 : A score of 7 indicates that investigation and changes are required immediately.

26. Action level Picture 1 - Action level 4 : A score of 7 indicates that investigation and changes are required immediately. Picture 2 - Action level 3 : A score of 5 or 6 indicates that investigation and changes are required soon. # The requirements for action into which the grand scores are divided is summarized into Action levels as follows. # The requirements for action into which the grand scores are divided is summarized into Action levels as follows.

27. Improvements

28. Improvement – 1 & 2

29. Improvement - 3

30. Improvement - 4

31. Improvement - 5

32. Gantt chart 1주1주 2주2주 3주3주 4주4주 5주5주 6주6주 7주7주 8주8주 9주9주 10 주 11 주 12 주 13 주 14 주 Organizing team Theme selection Symptom Survey on MSDs work measurement interim report Data analysis and evaluation Improvement Final report