In this observational method, postures and movements of
body parts, including back, shoulder/upper arm,
wrist/hand, and neck, are assessed. Furthermore,
information is obtained about work conditions such
as task duration, maximum weight handled, hand
force exertion, vibration exposure, and task visual
demands from the workers. Therefore, the total QEC
score for each task is based on a combination of
scores of each body part assessed by the observer
and worker. Finally, in order to determine risk level
of tasks, this total score is divided by the maximum
possible score (i.e., 176 for manual material
handling tasks and 162 for others).