1) interviews for gathering information on user ergonomic demands or ergonomic demand items (EDIs);
2) identification of an importance score for the EDIs based on how often they are mentioned by respondents in the interview, and on the order in which items are mentioned. Items are scored, for each respondent, according to the order of their mentioning (i.e.first mentioned EDI scores 1, second scores 2, third scores 3, and so on). The item importance weight is then given by its inverse order, therefore first mentioned items received higher scores: 1/1 ¼1.00; 1/2 ¼ 0.50, 1/3 ¼ 0.33 etc. Items from all interviews are reviewed and grouped to avoid replication due to how respondents may refer to the same EDI by different names. The final importance score of each EDI is obtained summing up the scores from all respondents;
3) incorporation of experts' opinion for the inclusion of EDIs not identified by workers but deemed important by the experts.