Book excerpt: These guidelines have been prepared by the International Labour Office in order to assist employers and national organisations with practical advice on implementing and improving occupational safety and health (OSH) management systems, in order to reduce work-related injuries, occupational ill health and diseases and unsafe working conditions. The guidelines may be applied on two levels: they provide a national OSH framework for legal and voluntary regulatory standards; and encourage the integration of OSH management principles with overall policy management at the organisational level.