Abstract :
Rapid upper limb assessment (RULA) is a survey method developed for assessing the exposure to risk factors associated with musculoskeletal disorders (MSDs). Based on the results of the data collection and the process using the RULA method the work tools or workstations are redesigned in order to avoid musculoskeletal problems. However, users of this tool may be uncertain about his/her risk assessment. A new model based on Fuzzy logic is presented to eliminate the uncertainty that occurs through the risk calculation. The proposed model was verified by a real case study in a solar power plant cleaning process and showed more flexibility in the decision-making.