The document discusses the development of biomechanical methods for ergonomic evaluation and compares them with established observation methods such as the RULA and SES. It highlights the results of tests using sensors to measure biomechanical data during various tasks and concludes that while biomechanical methods provide a more accurate assessment of risk factors, discrepancies remain in the evaluation of neck and wrist postures across the different methods. Overall, the biomechanical approach is found to be more effective in assessing ergonomic workloads compared to observation techniques.