Although all ergonomic risk analysis tools have a
bias, if the tools are used correctly, these biases can
be recognized or considered in interpretation of total
output. The results show that no agreement was
found between these methods and there is no
correlation between output of REBA and QEC
methods and reported MSDs. Therefore, there is no
possibility of interchangeable application of these
methods for postural risk assessment in working
stations. In ergonomic risk assessment and postural
analysis, the choice of analysis tools must be based
on the nature of the work, major identified
ergonomic risk factors, and the results of assessment
of MSDs prevalence in the workplace. An
appropriate method should take into account any
variables (risk factors) which may influence or
impact the prevalence of MSDs. In other word, it
should analyze subjects/workstations in greater
detail to determine and calculate the risk level. We
believe each ergonomic risk assessment method has
its own usage and it is better to use these methods
together to complement each other, but we do not
propose the interchangeable usage of these methods