Occupational Safety and Health

Scope and key concepts

OSH covers a wide range of activities and responsibilities. Common elements include hazard identification, risk assessment, selection and implementation of controls, health surveillance, incident investigation and continuous improvement. Controls typically follow a hierarchy: elimination or substitution of hazards, engineering controls, administrative measures and personal protective equipment (PPE) as a last resort. Worker participation, training and clear communication are essential components for effectiveness.

Main components

• Hazard identification and risk assessment: systematic processes to find hazards and estimate their likelihood and severity.
• Preventive and corrective measures: engineering changes, safe procedures, maintenance and PPE.
• Health surveillance and medical support: monitoring for occupational diseases and managing return‑to‑work programs.
• Training and information: ensuring workers know risks, safe practices and emergency procedures.
• Management systems and inspection: policies, audits and records that promote continuous improvement.

Legal frameworks and responsibilities

Many countries regulate workplace safety and health through national legislation, standards and enforcement agencies. Laws typically place primary responsibility on employers to provide a safe workplace, to assess risks and to train and protect employees. Employees also have duties to follow safety instructions, use provided controls and report hazards. In addition to national rules, international instruments, technical standards and industry codes of practice provide guidance. The specific terminology and statutory arrangements vary between jurisdictions.

History and development

The origins of modern occupational safety and health trace back to the industrial revolution when rapid mechanization and factory work produced new hazards. Early reforms—such as factory acts and safety regulations—responded to frequent accidents and poor working conditions. Over the 19th and 20th centuries, the emergence of occupational medicine, industrial hygiene and systematic risk management broadened the focus from preventing traumatic injuries to addressing chronic exposures, ergonomics and psychosocial risks. Technological advances and evolving social expectations continue to shape OSH practice.

Practical implementation and examples

Effective OSH combines technical, organizational and behavioral measures. Examples include redesigning workstations to reduce musculoskeletal strain, installing ventilation to limit chemical exposure, instituting lockout/tagout procedures for machinery, and conducting emergency drills. Many workplaces establish safety committees, conduct regular inspections, maintain incident reporting systems and provide targeted training. In sectors such as construction, manufacturing, healthcare and agriculture, sector‑specific controls and monitoring are common.

Benefits and notable distinctions

Investing in occupational safety and health reduces injuries, illnesses and related costs such as compensation and lost work time, while improving morale and productivity. It also fulfills ethical and legal obligations to protect workers. It is useful to distinguish between "occupational safety"—often emphasizing accident prevention—and "occupational health," which focuses on preventing work‑related disease and preserving long‑term health. The term "job security" (protection against unemployment) is distinct and should not be conflated with OSH. Terminology may differ by country and language, but the common goal is the protection and promotion of worker health and safety.