III. Reba Method
REBA Method is a quick and easy to use observational postural analysis tool for whole body activities and giving a
musculoskeletal risk action level. The method is similar to RULA tool where the assessor assigns scores to postures and body alignment based on body part diagram. Load, Force and coupling scores are added to calculation for the body and then final score for both groups are summated to form the final action score .The REBA method evaluate the ergonomics risk factor by observation the posture of employees while they working at their workstation directly (H i gnet, S. and McAtamney, L. 2000).Postural and biomechanical loading was assessed on the entire body by valid REBA method. We used several score in this method with the help of REBA score sheet, that the scores evaluate the posture of different body parts Neck, Trunk and Legs give posture score A with the help of standard Table and Upper Arm, Lower Arm, Wrist, and Wrist twist give the posture score B with the help of standard Table . The loading or coupling scores were added to posture scores A and posture score B to obtain scores A and B, respectively (McAtamney and Corlett 1993). Combination of scores A and score B give the Grand score with the use of standard Table and table score C is obtained. After this the activity score is added in the table score C the final REBA score is obtained. The range of Grand scores varies from 1 to 11 and reflects the musculoskeletal loading associated with the worker’s posture. Whereas low scores of 1 indicate that the work posture is acceptable if not maintained or repeated for long time (action level 1), For low score of 2 to 3, further investigation is needed and changes may be necessary (action level 2). Investigation and changes are required for scores of 4 to 7 (action level 3). Further investigation and changes are required soon for score of 8 to 10 (action level 4). Further investigation and the changes required immediately for the score of 11 and onward. REBA action level is shown in Table -1. REBA score 1 show the negligible risk level, REBA score 2 to 3 shows the low level risk, REBA score 4 to 7 shows the medium level risk, REBA score 8 to 10 shows the high level risk. REAB score 11 to 12 shows very high level risk. Figure 2 to 5 shows the work of worker at different processes in awkward posture like shearing, furnace unloading, forging process, grinding process and picking or placing.
III. Reba วิธีREBA วิธีเป็นเครื่องมืออย่างรวดเร็ว และง่ายต่อการใช้สังเกตการณ์เนื้อ postural วิเคราะห์กิจกรรมทั้งร่างกายและให้การmusculoskeletal risk action level. The method is similar to RULA tool where the assessor assigns scores to postures and body alignment based on body part diagram. Load, Force and coupling scores are added to calculation for the body and then final score for both groups are summated to form the final action score .The REBA method evaluate the ergonomics risk factor by observation the posture of employees while they working at their workstation directly (H i gnet, S. and McAtamney, L. 2000).Postural and biomechanical loading was assessed on the entire body by valid REBA method. We used several score in this method with the help of REBA score sheet, that the scores evaluate the posture of different body parts Neck, Trunk and Legs give posture score A with the help of standard Table and Upper Arm, Lower Arm, Wrist, and Wrist twist give the posture score B with the help of standard Table . The loading or coupling scores were added to posture scores A and posture score B to obtain scores A and B, respectively (McAtamney and Corlett 1993). Combination of scores A and score B give the Grand score with the use of standard Table and table score C is obtained. After this the activity score is added in the table score C the final REBA score is obtained. The range of Grand scores varies from 1 to 11 and reflects the musculoskeletal loading associated with the worker’s posture. Whereas low scores of 1 indicate that the work posture is acceptable if not maintained or repeated for long time (action level 1), For low score of 2 to 3, further investigation is needed and changes may be necessary (action level 2). Investigation and changes are required for scores of 4 to 7 (action level 3). Further investigation and changes are required soon for score of 8 to 10 (action level 4). Further investigation and the changes required immediately for the score of 11 and onward. REBA action level is shown in Table -1. REBA score 1 show the negligible risk level, REBA score 2 to 3 shows the low level risk, REBA score 4 to 7 shows the medium level risk, REBA score 8 to 10 shows the high level risk. REAB score 11 to 12 shows very high level risk. Figure 2 to 5 shows the work of worker at different processes in awkward posture like shearing, furnace unloading, forging process, grinding process and picking or placing.
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III. Reba Method
REBA Method is a quick and easy to use observational postural analysis tool for whole body activities and giving a
musculoskeletal risk action level. The method is similar to RULA tool where the assessor assigns scores to postures and body alignment based on body part diagram. Load, Force and coupling scores are added to calculation for the body and then final score for both groups are summated to form the final action score .The REBA method evaluate the ergonomics risk factor by observation the posture of employees while they working at their workstation directly (H i gnet, S. and McAtamney, L. 2000).Postural and biomechanical loading was assessed on the entire body by valid REBA method. We used several score in this method with the help of REBA score sheet, that the scores evaluate the posture of different body parts Neck, Trunk and Legs give posture score A with the help of standard Table and Upper Arm, Lower Arm, Wrist, and Wrist twist give the posture score B with the help of standard Table . The loading or coupling scores were added to posture scores A and posture score B to obtain scores A and B, respectively (McAtamney and Corlett 1993). Combination of scores A and score B give the Grand score with the use of standard Table and table score C is obtained. After this the activity score is added in the table score C the final REBA score is obtained. The range of Grand scores varies from 1 to 11 and reflects the musculoskeletal loading associated with the worker’s posture. Whereas low scores of 1 indicate that the work posture is acceptable if not maintained or repeated for long time (action level 1), For low score of 2 to 3, further investigation is needed and changes may be necessary (action level 2). Investigation and changes are required for scores of 4 to 7 (action level 3). Further investigation and changes are required soon for score of 8 to 10 (action level 4). Further investigation and the changes required immediately for the score of 11 and onward. REBA action level is shown in Table -1. REBA score 1 show the negligible risk level, REBA score 2 to 3 shows the low level risk, REBA score 4 to 7 shows the medium level risk, REBA score 8 to 10 shows the high level risk. REAB score 11 to 12 shows very high level risk. Figure 2 to 5 shows the work of worker at different processes in awkward posture like shearing, furnace unloading, forging process, grinding process and picking or placing.
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