It is a practical, systematic, comprehensive, modular, flexible, scientific questionnaire, that is, well adapted to national laws:

1. Practical utility. It is a practical tool based on empirical research which has been adapted to national laws on the assessment and prevention of occupational hazards.

2. Systematic and comprehensive. The scales cover a wide range of stressors (psychosocial dangers) and consequences (individual, group and organizational damage).

3. Modular and flexible. The RED questionnaire matrix is ‘modular’ and is made up of 37 scales.

4. Scientific. The scales included in the questionnaire have been validated in previous studies (see list of publications) and are based on theoretical models of scientific impact in the field of Occupational Health Psychology.

5. Copyright. RED holds a copyright for the scales and instruments used.

6. Presentation. Results reports are presented in a clear and simple language which is easy for the non-scientific community to understand.

7. Electronic version. This questionnaire is available in an electronic version (via the Internet or Intranet).