assessment would require specific knowledge of several aspects: of the specific topic, of the — real — 
situation at the workplaces in an enterprise, and of the expected reduction of these risks by the proposed 
or recommended risk mitigation measures. This has rarely been done. Moreover, even inside one 
enterprise the quality of a risk assessment might differ depending on the topic , for example, 
between ‘easier’ topics as ‘correct provision of warning signals’ or ‘adequate temperatures’, and more 
complex topics like psychosocial, musculoskeletal, or chemical and biological risks.414