Human Engineering Evaluation of Street Cleaners’ MSDs Symptoms

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

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

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

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

Survey from street cleaners Ages Years of service

Survey from street cleaners

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.

Evaluation Group 1

Posture analysis of RULA An action of picking up trash

Table A-1 upper arm lower arm wrist posture score 1234 wrist twist Score A

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

Table B-1 Neck posture score trunk posture score legs Score B

Table C 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)

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

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.

Evaluation Group 2

Posture analysis of RULA An action of putting trash

Table A-2 upper arm lower arm wrist posture score 1234 wrist twist Score A

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

Table B-2 Neck posture score trunk posture score legs Score B

Table C 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)

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

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.

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.

Improvements

Improvement – 1 & 2

Improvement - 3

Improvement - 4

Improvement - 5

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