Each ergonomic risk assessment method has a
classification of body posture, ultimately, their risk
levels can be varried due to the differences in the
process of information and basic of any method.
Although REBA and QEC methods are used to
evaluate the entire body, each of them studied
different factors. For example, REBA can study
posture of trunk, neck, and legs (in combination with
force/load score) and upper arms, lower arms, and
wrists (in combination with coupling score),
however, the QEC can study posture of back,
shoulder/upper arm, wrist/hand, and neck combined
with the score of task duration, weight handled, hand
force exertion, vibration exposure, and visual task
demands which are obtained from the workers (18-