Based on diagnosis and worker proposals raised in the appraisal stage (interviews) the experts' team developed alternative solutions that focused on the design of the new work system, although workstation and environmental solutions were also proposed. One of the alternatives was selected for prototyping and testing after discussions between the experts' team and two managers. Some changes in the work system and workstations were carried out and tested based on feedback from 11 volunteer workers involved in the prototyping stage and from the analysis from the experts' team.Afterwards, the new design was qualitatively validated by the same
eleven workers, two managers and experts' team.