Recognising the diversity of Participatory Ergonomics (PE) and the need for better research and practice guidance, the Health and Safety Executive in the UK commissioned a guidance document. A modified set of dimensions has now been produced as a conceptual framework for understanding PE. In this paper the framework is validated within a structured exercise, involving case studies previously carried out by peers of TNO Work and Employment. Thus the framework has been produced in the UK and been validated using 7 cases in the Netherlands (armed services, community health and domestic care, installation industry, chassis assembly of trucks, daycare for children, construction and tractor assembly). The majority of the projects has "reducing physical workload" as one of their stated aims. The paper begins by describing the framework to be tested and the methods used in the validation exercise. The results of the exercise are then presented and discussed, and implications are drawn for the development of the framework.