Some useful links about participatory ergonomics:

• Definition in wikipedia
  Basic definition of the concept with some useful references and external information. Good to get familiar with the concept.
• Process and implementation of participatory ergonomics interventions: A systematic review
  Very interesting experience developed by the Insitute for Work and Health (IWH). Includes two detailed volumes with development and specific experiences in Participatory Ergonomics.
• Participatory ergonomics (Ontario Leaflet)
  Leaflet to promote the Participatory Ergonomics.
• What is participatory ergonomics? (In Spanish)
  Interesting article about how to develop programs in PE.