. . 2556 16-18 2556

The Comparison of Ergonomics posture assessment methods

A case study of welding shop floor at University of Phayao.

1* 2 1 . . 12121

2 . . 56000 E-mail : kit_9m@hotmail.com*

Khomkit Meksagul1*Namngern Chantaramanee2 1Medical Engineering, Faculty of Engineering, Thammasat University, Pathum Thani. 2Occupational Health and Safety, School of Medicine, University of Phayao, Phayao.

E-mail : kit_9m@hotmail.com*

11 (Abnormal Index),OWAS (Ovako Working Posture Analysis System) REBA (Rapid Entire Body

Assessment) 3

ABSTRACT

The objectives of this research were to study ergonomics risk posture and to compare the methods for

risk assessment in welding shop. 11 engineering students were selected. The ergonomics risks were assessed by three methods (Abnormal Index, OWAS and REBA).

The results showed, All three methods give the corresponding results. Then, the method of any one method can apply to ergonomics risk assessment and unsafe posture identification in welding shop.

Keywords: Ergonomics assessment work methods welding shop

. . 2556 16-18 2556

1.

19 (Forge Welding)

20

1 2

2 Manual Metal Arc (MMA)

Shielded Metal Arc Welding (SMAW)

2.

2.1

2.2

3.

3

3.1 Abnormal Index (AI)

. .

CERGO questionnaire

8

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0 � 9 ( 0 9 )

AI8

]8,3[]7,6,5,4,2,1[ (1)

(1) (AI)

AI 0 0 AI 2

2 AI 3 3 AI 4

4>AI

3.2 OWAS(Ovako Working Posture Analysis System)

Ovako Steel Company

(Finnish Institute of Occupational Health) . .

1973

4 3

7 3

OWAS 4 1

2

3

4

3.3 REBA (Rapid Entire Body

Assessment) Dr.Sue Hignett

Dr.Lynn McAtamney

RULA (Rapid Upper Limb Assessment) 15

A

C

B

C

C C

REBA 15 1

2 � 3 4 � 7

8 � 10 11 � 15

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4.

Abnormal Index

11

5 6 Kolmogorov Smirnov

One Sample Test (Goodness of fit)

1 Kolmogorov-Smirnov test

N 5 6 Normal Parameters (Mean) 2.6020 2.2517

Std. Deviation 0.66788 1.31120

Kolmogorov-Smirnov Z .535 .506

Asymp. Sig. (2-tailed) .937 .960

1 p-value >.05

(normal curve) (AI)

2.60 2.25

(AI) Independentt-test

2 Independentt-test

Mean 2.6020 2.2517

Std. Deviation 0.66788 1.31120

F-test 3.133

Sig. 0.111 Df 9

t Stat 0.538019561

P(T<=t) one-tail 0.301805876

t Critical one-tail 1.833112923 P(T<=t) two-tail 0.603611751

t Critical two-tail 2.262157158

2 p-value >.05

(AI)

95%

(AI)

2 AI 3

1

(welding work-station)

OWAS REBA

2

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OWAS

2 1

2

10 1

3 OWAS

3 OWAS 2

REBA

4 REBA

4 REBA

4 � 7

OWAS

5.

(AI) 2 � 3

(AI) 95%

OWAS

2 REBA

4 � 7

3

OWAS (Ovako Working Posture

Analysis System) REBA (Rapid Entire Body Assessment) Abnormal Index

3

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(2550)

(Objective Assessment)

3

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RapidEntire Body Assessment : REBA. AppliedErgonomics, 31:201�205.

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